Method of prestressed rope armature guy in construction conditions and device for its realisations (variants)

FIELD: construction.

SUBSTANCE: armature guy is carried out at first in angular cells on construction contour, then in central cell, after in cells adjoining to central cell on all central axis across construction, then on cells of layer adjoining to central layer of cells in direction to external contour and at the end cells located on construction perimeter. In angular cells an armature guy is made in spans between a corner pillar and the first from it in two axes on construction location. In cells adjoining to central cell, on all central axis a guy is made on longitudinal spans on construction location, on cells of a layer adjoining to central layer of cells, guy is made in two mutually perpendicular spans, beginning from central axes concerning central cell, thus guy on different parts is carried out by different devices.

EFFECT: increase of load-carrying capacity of construction floorings and reliability of devices for armature guy.

7 cl, 8 dwg, 1 ex

 

The invention relates to the field of construction and is intended for the construction process of multistory reinforced concrete buildings for residential, public and industrial purposes with tension reinforcement in construction conditions.

There is a method of erecting a multi-storey frame buildings [Patent RU No. 2137886 Appl. 01.07.1998], including concreting of columns and slabs formwork each floor with education in overlapping open channels in mutually perpendicular directions for placement of the prestressing reinforcement by installing the formwork of kanaloobrazuyuschego. Open channels overlap perform variable depth with a slope to the center of each span of the frame to a value equal to the thickness of the slab. After hardening of the concrete, remove the casing and remove canadaontario that set up the next concreting of the floor frame. In open channels along the edges of columns in accordance with the curve of bending moments placed pre-tense the valve. Pull hydraulic Jack and is fixed on the ends of the joists around the perimeter of the building frame.

The disadvantage of this method is the high complexity and consequently low productivity, there is no uniformity of stresses in the cable fixture.

There is a method of pre-construction at the mummer frame multi-building [Patent RU No. 2140495 Appl. 01.07.1998], which includes the installation of columns with continuous channels in the level of overlap, installation of floor slabs, placing pre-tensioned reinforcement between the floor slabs and in the channels of the columns, the limb of the armature in accordance with a given plot of bending moments in the spans of the building, the tension of the armature with the subsequent fixing of its ends to the extreme columns of the building and monolithic joints and channels. Limb armature carried out by the application of tension reinforcement in the first flights of the building by fixing the points of inflection to tension reinforcement, followed by a post-tensioning reinforcement by application to the armature concentrated vertical forces at the points of inflection. The technical result of the invention is to provide a uniform compression of overlap in each span of the building and reduce the loss of prestress in the fixture.

The disadvantage is obvious uneven stresses in the armature being drawn across the disk slabs.

There is a method of tensioning the cable reinforcement in the manufacture of precast-monolithic floors of buildings with process framework [Patent RU No. 2199632 Appl. 13.06.2001], including the prestress of the beams in two orthogonal directions. In this way the tension is produced in one step directly through unbendable pins in curvilinear certan and, the tension in each rope is increased by half the total loss of power from friction in the excesses of the columns and on the pins, thibaudia all spans ropes down. Half ropes, one on each axis is stretched on one side and the other half on the opposite side of the axis.

The disadvantage of this method is the complexity of installation unbendable pins in the floor slab along the length (width) of the building that requires either special equipment or staff, and hinders the skipping rope fittings between the contacting surfaces. Simultaneously, the tension force is spent on the friction in the contact area, a part of which is redistributed in the friction force between the unbendable pins and channels in the columns that does not provide the uniformity of the force of the tension in each rope. Process for the simultaneous installation of unbendable pins is time-consuming.

Closest to the claimed method according to essential features is a well-known method of tensioning high-strength reinforcement in the construction of reinforced concrete frame buildings on the structural system IC [Patent SFRY BP. 25452. Appl. 07.12.1962]. According to the method of connection of floor slabs carried out without welding by means of compression plates through the columns of the ropes that miss h is cut the holes in the columns and axial joints between the plates with the outer faces of the columns, ropes aneroussa collet clamps that after fabrication of the slab concreted and leave the building. After the horizontal tension of the ropes by injectiona channels with ropes through the holes in the columns with cement mortar. After hardening of the mortar produced quickdraw free of the ropes between the columns down and fix them in the drawn state of the locking elements in the form of pins, the latter is inserted into openings in the floor slabs. Further concreted all axial seams with ropes. Buildings, manufactured by this method are earthquake resistant.

The disadvantage of the prototype is that it does not have the sequence of delays flights in the frame of the building, which leads to difficulties when installing the metal pins on the end of the process delays the last span of the structure due to misalignment and uneven stresses in the reinforcement, not solved mechanism delays prestressed cable fittings.

Also known device to implement the method of procrastination prestressed cable reinforcement in construction conditions.

A device for tensioning reinforcement and fixation [Patent RU No. 2132431 Appl. 13.03.1998], which contains a tensioning mechanism fittings with clamps and crimping mechanism anchor sleeves arranged coaxially. The mechanism opresso the key has a cylinder with a power piston rod and mounted in the housing of the hydraulic cylinder, the matrix. The tensioning mechanism made in the form of additional hydraulic cylinder mounted on the power shaft of the hydraulic cylinder mechanism crimp with the ability to maintain a constant tension force in the reinforcement. Transactions of the tension reinforcement and fixing it at one stage.

The disadvantage of this device is a violation of the uniform voltage in each armature at a consistent tension several ropes.

From the technical level of a device for tension reinforcement [AC No. 1011839 Appl. 06.04.1981], representing the support plate, the hinge associated levers, thrust with the seizure and pushers, attached to the rocker. At the ends of the thrust has a grip for fixing valves and levers posted by clamps, made in the form of forks. The measure of the efforts made in the form of strain gages installed on the deadlift. The force on the levers serves any power body, then the force is distributed on the tappets, rocker and traction with grip, pulling the valve.

The disadvantage of analogue is high materials and dimensions of the device, which requires labor to move and install it in the area of tension reinforcement in construction conditions.

A device for tension reinforcement [AC No. 1013612 Appl. 03.03.1981], including struts, the ends of which are attached by hinges the nuts and anchor flanges. The bearing flanges, a hinge connecting the ends of the crosspieces have grooves for passage of the rods and pre-tensioned reinforcement. Thrust combined with a power washer, and their ends secured to the other of the supporting flange. A power washer is used to transfer tensile forces pre-tensioned reinforcement. Anchoring rebar in the power washer and the supporting flange carried by the grippers. The tension reinforcement is closer to each other the ends of the rebar.

The disadvantage of analog is the complexity of the process of tension reinforcement, its dimensions do not allow for tension reinforcement in construction conditions, and the process delays the valve down in the interplate channel structurally impossible to implement.

The closest to the essential features of the claimed device for delays prestressed cable reinforcement in construction conditions in the cells at the perimeter of the building and the cells under the lift shafts and staircases is a device for tension reinforcement [AC No. 238119 Appl. 21.04.1967], which includes a cylinder member by a piston that interacts with the stops, and inventory thrust. Thrust is attached to the cylinder by means of the bracket with clips horizontal steps. The latches are connected with couplings installed on inventory rods, bearing anchor plate with Armat is Roy. Moving the piston, the cylinder carries a bracket with clips horizontal actions connected through couplings with inventory rods, from which the power is transmitted anchor plate with fittings. Upon reaching the desired tension reinforcement inventory thrust is fixed on the supports.

The disadvantage of the prototype is limited in its use and the inability to use such designs for guys prestressed cable fittings down in construction conditions.

The task of the claimed invention is a method and device that provides simultaneous uniform quickdraw prestressed cable reinforcement in construction conditions for equalization of stresses in each line.

Technical results that may be obtained by using the invention are:

for a method of procrastination prestressed cable reinforcement in construction conditions:

exception warp tension when procrastination prestressed cable reinforcement in construction conditions down;

- ensuring uniform tension prestressed cable fittings;

- increasing the carrying capacity of the slab;

- easier installation of dowels;

- improving technology;

for devices:

- increase compactness;

- simplification of the operation;/p>

- improved reliability;

- increase lifetime.

The solution of the stated problem and achieve the above results, it became possible for the method of procrastination prestressed cable reinforcement in construction conditions, including preliminary horizontal tension cable fittings with subsequent injection of its cement mortar in the channels of the columns, the shutter speed until the set of solution of the transfer strength, quickdraw prestressed cable fittings down in each cell formed by four columns, by the force of the hydraulic cylinder to the thrust plate, transmitting it to the valve, the installation of the tabs in the slots of the floor slabs and the subsequent fixation of the cable reinforcement in the channels between the plates of overlappings in two places of the span between the columns, with quickdraw carried out first in the corner cells the contour of the building, then in the cell, after the cell adjacent to the cell across the Central axis across the building, then the number of cells adjacent to the Central row of cells towards the outer loop, and complete cells, located on the perimeter of the building, in the corner cells of the building quickdraw prestressed cable fittings are produced in the spans between a corner column and the first from her in two axes at the location of the building, in chakah, adjacent to the Central cell, quickdraw produce throughout Central axis in the longitudinal spans the location of the building, the number of cells adjacent to the Central row of cells, quickdraw conduct in two mutually perpendicular spans from the Central axis relative to the Central cell.

Procrastination at prestressed cable fittings in cells along the perimeter of the buildings and the cells under the lift shafts and staircases before the application of force to the thrust plate is first installed in the installation grooves slabs made at a certain distance from the slots under the retainer in the form of a dowel, then pass into the channel between floor slabs around this plate inventory thrust, which is fixed with anchor plates and bottom plates, position gidrotartrat stationary part on the guide and the rod is placed along the axis of the cylindrical sleeve on the thrust plate, then set the plate serves the force of the hydraulic cylinder and move it together with prestressed cable fittings up to the moment when this valve will be below the slots under Nagel, then turn Nagel relative to its means over the cable fittings and install it into the grooves, which are arranged offset in opposite directions from the axis location Nagel and UKL the nom to the edge of floor slabs, then remove from the bearing plate effort to contact prestressed cable fittings with pins.

In cells located within the building, the force of the hydraulic cylinder is applied to the thrust plate, which is installed with the possibility of moving along the axis of the piston rod of the hydraulic cylinder and communicates with the thrust beam through functional cable fittings with sleeve, abutting against the thrust beam, the face of which is in contact with the floor slabs.

Device for delays prestressed cable reinforcement in construction conditions in the cells at the perimeter of the building and the cells under the lift shafts and staircases includes gidrotartrat, thrust plate, anchor plate, inventory traction connecting the base plate with anchor plate, with gidrotartrat is located between the thrust plate and anchor plate fitted in the Central part of the guide bushing hydraulic cylinder, the thrust plate is made bevels, preventing contact with the inventory rods and mounting slots in the floor slabs, and a cylindrical sleeve for sign-rod hydraulic cylinder, anchor plate and lower plates are made through the slots for move inventory rods.

Inventory thrust provided at the ends of the thread, and their cross-section is made or round or polyhedral, or t is updatem.

Device for delays prestressed cable reinforcement in construction conditions for the cells located inside the building, contains gidrotartrat, thrust plate, thrust beam, while the thrust plate has a bottom safety edge, and the top of the cheeks, in the center of the bearing plate is made the hole with the ability to skip functional cable fittings.

Functional cable fittings can be made in the form of a rod, with or round, or square, or the proper polyhedral or cylindrical cross-section, the opening in the thrust plate and the thrust beam has a cross section similar to the cross section of the rod.

Inventive step is to obtain a fully statically indeterminate system triaxial tension structures in construction conditions in two phases tension cable fittings: horizontal tension and delays prestressed cable fittings down. This method of simultaneous delays of several ropes not leads to severe stress concentration at the joints between columns and floor slabs, resulting in missing areas jacking concrete and formation of residual deformations in the joints in the form of so-called "pyramids", which eliminates the skew prestressed cable fittings, simplifying the installation of the pins and providing ravnomerno the e tension reinforcement. This increases the carrying capacity of the entire disk slabs and buildings in General, and therefore, resistance to wind and seismic loads, which allows to build high-rise structures.

The inventive device can solve the problem of procrastination prestressed cable fittings in the cells of the frame as on the perimeter of the building and in cells under lift shafts and staircases, and the cells inside the building. Inventive step devices is their versatility, in the first and the second used the same gidrotartrat for preliminary horizontal tension of the cable fittings. The absence of mating parts in devices reduce wear, and accordingly simplifies operation, increasing its duration, thereby increasing the reliability of the design. A small number of parts provides a low intensity and, accordingly, compactness, which allows you to speed up the process delays while pulling prestressed cable fittings on cells according to the claimed method of procrastination.

Guide anchor plate and a cylindrical sleeve bearing plate provide strict alignment rod of the hydraulic cylinder with the direction of the effort is strictly aimed at the bearing plate, through clear positioning hydraulic cylinder sootvetstvenno the force. The anchor plate and the bottom plate have through the slots, whereby to achieve vertical placement inventory rods. To ensure maintainability of the anchor plate, thrust beam and thrust plate provided with handles.

Thrust plate equipped with safety edges, excluding the contact prestressed cable fittings with floor slabs, which in the case of misalignment of the bearing plate to prevent slipping and jamming of the valve between the floor slabs and retaining plate. To prevent the departure of the rod of the hydraulic cylinder in the direction of the thrust plate is made of cheeks, ensuring the safe operation of the operator.

The inventive method delays prestressed cable fittings and device for its implementation allow to improve the manufacturability of the process, spending minimum time - 2-3 minutes on quickdraw one site.

The claimed invention is illustrated in the following figure.

Figure 1 - the structure of the building (view from above): cell frame; columns; prestressed cable fittings; zone delays prestressed cable fittings.

Figure 2 - device delays prestressed cable reinforcement along the perimeter of the building and in cells under lift shafts and staircases (cut parallel to the prestressed cable fittings): anchor plate; gidrotartrat; Inventa the major thrust; the lower plate; prestressed cable fittings; thrust plate; a cylindrical sleeve; a piston rod of the hydraulic cylinder; slabs; arm; a guide; a groove under Nagel.

Figure 3 - device delays prestressed cable reinforcement along the perimeter of the building and in cells under lift shafts and staircases (cut perpendicular to the prestressing cable fittings): prestressed cable fittings; gidrotartrat; thrust plate; inventory thrust; the bottom plate; arm; slabs.

Figure 4 is a device for delays prestressed cable reinforcement along the perimeter of the building and in cells under lift shafts and staircases (top view): prestressed cable fittings; anchor plate; slabs; through the slots; the groove under Nagel; Nagel; washer; nut.

5 is a device for delays prestressed cable fittings cells located inside the building (section perpendicular to the prestressing cable fittings): prestressed cable fittings; gidrotartrat; slabs; thrust plate; a thrust beam; safety edges; cheek; arm bearing plate; arm thrust beams.

6 is a device for delays prestressed cable fittings cells located inside the building (cut parallel to the prestressed cable fittings): prestressed Kahn the percentage armature; the piston rod of the hydraulic cylinder; a groove in Nagel; slabs; functional cable fittings; liner; cheek; arm bearing plate; arm thrust beams.

Fig.7 - thrust plate (isometric): cylindrical sleeve; bevels.

Fig - bottom plate (isometric): through the slots.

To built the Foundation of the assembled building frame (not shown) in cells 1-5, the angles are placed in columns 6 through the holes in the columns omitted prestressed cable armature 7, which in the area of procrastination 8 installed thrust plate 9, which transmits the force of the hydraulic cylinder 10 (Fig.2-6).

Guy prestressed cable fittings in the cells on the perimeter of the building 1, 5 (figure 1) and the cells under the lift shafts and staircases is a device (Fig.2-4), which is available in the installation grooves (not shown) of the floor slab 11.

The device includes inventory thrust 12 connecting the anchor plate 13 and lower plate 14 by means of washers 15 and nuts 16 in the channel between the floor slab 11. On the thrust plate 9 is gidrotartrat 10 through the guide 17 and the cylindrical sleeve 18 made under the rod 19 of the hydraulic cylinder. Arm 20 is attached to the anchor plate 13, which is made through the slots 21, the same grooves have a bottom plate 14. The groove under Nagel 22 and the Nagel 23 are located at the corresponding distance is anii from the installation grooves floor slabs 11.

Guy prestressed cable fittings cells located inside buildings 2, 3, 4 (figure 1), is provided by the device (5, 6), which is located in the installation grooves (not shown) of the floor slab 11. The device comprises a thrust plate 9, which is installed gidrotartrat 10, the thrust beam 24 with arms 25 through which skipped functional cable armature 26 with the sleeve 27 to the stop of this beam in the floor slab 11. In the thrust plate 9 is made from the bottom of the safety edge 28, and the top of the cheeks 29, moreover, it is equipped with a handle 30.

The inventive method delays prestressed cable reinforcement in construction conditions as follows. In the beginning produce quickdraw prestressed cable reinforcement in the corner cells 1 along the contour of the building, with quickdraw perform only spans between a corner column and the first from her in two axes at the location of the building, then pulled in the cell 2 along its perimeter, then do the 3 cells adjacent to the cell 2 across the Central axis across the building, and only on the longitudinal spans the location of the building, then pulled the cell 4 rows adjacent to the Central row of cells 2, 3 toward the outer contour of the building in two mutually perpendicular spans, starting from the Central axis C which project relative to the Central cell 2 (figure 1).

This quickdraw prestressed cable fittings in the cells on the perimeter of the building 1, 5 (1), and the cells under the lift shafts and staircases perform a device that works as follows. Perform transfer of force from the hydraulic cylinder 10 on the bearing plate 9 located on prestressed cable fittings 7 (Fig.2-4), for which gidrotartrat 10 is positioned in the guide 17, the piston rod 19 which communicates with a cylindrical sleeve 18 attached to the thrust plate 9, next to equalize all inventories rod 12 relative to the channel between the floor slab 11, the thrust plate 9 and the anchor plate 13, then tighten the nut 16. However gidrotartrat 10 strictly fixed. Served the pressure in gidrotartrat 10, in this case, the rod 19 moves the thrust plate 9, at the same time which is drawn down prestressed cable fittings 7. The application efforts hydraulic cylinder to the thrust plate hold up until prestressed cable armature 7 will be below the slots under Nagel 22 in the floor slab 11 (Fig.2-4). After that insert into the slots under Nagel 22 floor slabs 11 Nagel (metal rod) 23 and begin a gradual withdrawal of forces with hydraulic cylinder until prestressed cable armature 7 will be in contact with the Nagel 23. Then the ending is jut the pressure and relieve stress from the bearing plate 9, remove gidrotartrat 10, pre unscrewing the nut 16, and move on to the next segment delays 8 (figure 1).

In the event of a possible misalignment of the bearing plate 9 of the cylindrical sleeve 18 prevents the maintenance of stem hydraulic cylinder 19 to the side, ensuring the stability of movement and safety in operation. Bevels 31 (7) ensure smooth movement of the bearing plate 9 in the channel between the mounting grooves of the floor slabs 11 and inventory rods 12.

Quickdraw prestressed cable fittings cells located inside a building, the device performs (figure 5-6), which works as follows. In the installation grooves floor slabs 11 are placed thrust plate 9 on prestressed cable-valve 7. Then on top of this plate set gidrotartrat 10. Next, the bottom floor slabs 11 serves resistant beam 24 through which skipped functional cable armature 26 with the sleeve 27, with functional cable armature 26 is passed through the hole in the thrust plate 9 and through gidrotartrat 10 until the thrust beam 24 touches the floor slab 11. Then served the pressure in gidrotartrat 10, and he, together with the thrust plate 9 is lowered down, passing through the rod 19 functional cable valve 26, thereby pulling prestressed cable-valve 7. As tol is to procrastinate armature will move below the grooves under Nagel 22 floor slabs 11, the pressure flow stop and set Nagel 23 in the grooves 22, then smoothly release the rod 19 of the hydraulic cylinder 10 to contact prestressed cable fittings 7 Nagel 23. Then remove the pressure from the hydraulic cylinder, release and put down thrust beam 24 together with the function of the cable fittings 26 and sleeve 27 and move on to the next section for delays 8 (1) according to the claimed method.

Thrust plate 9 of the device for delays prestressed cable fittings cells located inside the building has a safety edge 28, to prevent possible slippage prestressed cable valve 7, and a hole for the passage of functional cable fittings 26. Cheeks 29 prevent the departure of rod hydraulic cylinder 19 from the given direction, providing security in the process of procrastination.

The practical applicability of the invention shown in the example of a specific use.

Example.

On the Foundation of the assembled structure, in the form of cells, the angles are placed columns. In the columns with holes through which skipped prestressed cable fittings. On prestressed cable fittings transmit the force to the hydraulic cylinder attached to the thrust plate. In the beginning produce quickdraw prestressed cable reinforcement in the span between the corner columns is Oh and the first from her in two axes at the location of the building. Then pull in the cell along its perimeter, then perform in cells adjacent to the cell across the Central axis across the building, and only on the longitudinal spans the location of the building, then pulled on cells of the row adjacent to the Central row of cells towards the outer contour of the building in two mutually perpendicular spans from the Central axis of the building relative to the Central cell.

Quickdraw prestressed cable fittings in cells along the perimeter of the buildings and the cells under the lift shafts and staircases perform the following way. Before the application of force to the thrust plate is first installed in the installation grooves slabs made at a certain distance from the slots under the retainer in the form of a dowel, then pass into the channel between floor slabs around this plate inventory thrust, which is fixed with anchor plates and bottom plates, position gidrotartrat stationary part on the guide and the rod is placed along the axis of the cylindrical sleeve on the thrust plate, then set the plate serves the force of the hydraulic cylinder and move it together with prestressed cable fittings up to the moment when this valve will be below the slots under Nagel, then turn Nagel otnositel what it means over the cable fittings and install it into the grooves, located offset in opposite directions from the axis location Nagel and executed with a slope to the edge of floor slabs, then remove from the bearing plate effort to contact prestressed cable fittings with pins.

In cells located within the building, the force of the hydraulic cylinder is applied to the thrust plate, which is installed with the possibility of moving along the axis of the piston rod of the hydraulic cylinder and communicates with the thrust beam through functional cable fittings with sleeve, abutting against the thrust beam, the face of which is in contact with the floor slabs.

Features:

Deviation of residual stresses in drawn
the cable fixture on the ceiling, %±5
The bias armature being drawnno
Residual strain valid
values do not exceed, %17-25
The actual deflection of the floor slab
less than the calculated time2,5-3
Breaking load one cell
is kg/m22000
The total time for the serious single site
average, min2-3
The dimensions of the devices does not exceed
the following values, mm380×300×900
Weight (without hydraulic cylinder, kg16
Life, years7

The device does not require special equipment and service, there is no friction and lubricated surfaces, easy to install, including a small number of parts - a maximum of 16 PCs

As can be seen from the above example, the inventive method delays prestressed cable reinforcement in construction conditions and device for its implementation (options) functional and implemented with positive results, eliminating the warp tension when procrastination prestressed cable fittings and ensure its uniformity, so the deviation of residual stresses in the drawn cable fittings on the overlap does not exceed ±5%, and permanent deformation are 17-25% of the allowable. All of this increases the carrying capacity of the buildings, since the actual deflection of the floor slab is less than the estimated 2.5-3 times, and the breaking load per cell is 2000 kg/m2. Process delays of the high-tech and requires 2-3 minutes on one site, ACAC is.

The device used is reliable and simple in operation due to their simple design, compact - 380×300×900 mm) and lightweight (weight not exceeding 16 kg) in operation, which is important when performing work in construction conditions.

1. The way the guys are prestressed cable reinforcement in construction conditions, including preliminary horizontal tension cable fittings with subsequent injection of its cement mortar in the channels of the columns, the shutter speed until the set of solution of the transfer strength, quickdraw prestressed cable fittings down in each cell formed by four columns, by the force of the hydraulic cylinder to the thrust plate, transmitting it to the valve, the installation of the tabs in the slots of the floor slabs and the subsequent fixation of the cable reinforcement in the channels between the plates of overlappings in two places of the span between the columns, wherein the quickdraw carried out first in the corner cells on the contour of the building, then in the cell after the cells adjacent to the cell across the Central axis across the building, then the number of cells adjacent to the Central row of cells towards the outer loop, and complete cells, located on the perimeter of the building, in the corner cells of the building quickdraw prestressed cable reinforcement is raissadat in spans between a corner column and the first from her in two axes at the location of the building, in cells adjacent to the cell, quickdraw produce throughout Central axis in the longitudinal spans the location of the building, the number of cells adjacent to the Central row of cells, quickdraw conduct in two mutually perpendicular spans from the Central axis relative to the Central cell.

2. The method according to claim 1, characterized in that when procrastination prestressed cable fittings in cells along the perimeter of the buildings and the cells under the lift shafts and staircases before the application of force to the thrust plate is first installed in the installation grooves slabs made at a certain distance from the slots under the retainer in the form of a dowel, then pass into the channel between floor slabs around this plate inventory thrust, which is fixed with anchor plates and bottom plates, position gidrotartrat stationary part on the guide and the rod is placed along the axis of the cylindrical sleeve on the thrust plate, then the set plate serves the force of the hydraulic cylinder and move it together with prestressed cable fittings up to the moment when this valve will be below the slots under Nagel, then turn Nagel relative to its means over the cable fittings and install it into the grooves, which are arranged offset in the opposite side of the s from the axis location Nagel and executed with a slope to the edge of floor slabs, then remove from the bearing plate effort to contact prestressed cable fittings with Nagel.

3. The method according to claim 1, characterized in that the cells located inside the building, the force of the hydraulic cylinder is applied to the thrust plate, which is installed with the possibility of moving along the axis of the piston rod of the hydraulic cylinder and communicates with the thrust beam through functional cable fittings with sleeve, abutting against the thrust beam, the face of which is in contact with the floor slabs.

4. Device for delays prestressed cable reinforcement in construction conditions in the cells at the perimeter of the building and the cells under the lift shafts and staircases, including gidrotartrat, thrust plate, anchor plate, inventory traction connecting the base plate with anchor plate, wherein gidrotartrat is located between the thrust plate and anchor plate fitted in the Central part of the guide bushing hydraulic cylinder, the thrust plate is made bevels, preventing contact with the inventory rods and mounting slots in the floor slabs, and a cylindrical sleeve for sign-rod hydraulic cylinder, anchor plate and lower plates made through the slots to move inventory rods.

5. The device according to claim 4, characterized in that inventory thrust f is received at the ends of the thread, and their cross-section is made or round or polyhedral, or tubular.

6. Device for delays prestressed cable reinforcement in construction conditions for the cells located inside the building, characterized by the presence of hydraulic jacks, thrust plate, thrust beams, while the thrust plate has a bottom safety edge, and the top - cheeks, in the center of the bearing plate is made the hole with the ability to skip functional cable fittings.

7. The device according to claim 6, characterized in that the functional cable fittings can be made in the form of a rod, with or round, or square, or the proper polyhedral or cylindrical cross-section, the opening in the thrust plate and the thrust beam has a cross section similar to the cross section of the rod.



 

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4 dwg

FIELD: construction.

SUBSTANCE: armature guy is carried out at first in angular cells on construction contour, then in central cell, after in cells adjoining to central cell on all central axis across construction, then on cells of layer adjoining to central layer of cells in direction to external contour and at the end cells located on construction perimeter. In angular cells an armature guy is made in spans between a corner pillar and the first from it in two axes on construction location. In cells adjoining to central cell, on all central axis a guy is made on longitudinal spans on construction location, on cells of a layer adjoining to central layer of cells, guy is made in two mutually perpendicular spans, beginning from central axes concerning central cell, thus guy on different parts is carried out by different devices.

EFFECT: increase of load-carrying capacity of construction floorings and reliability of devices for armature guy.

7 cl, 8 dwg, 1 ex

FIELD: construction.

SUBSTANCE: method of erection consists that casing is mounted between flooring slabs and columns, having laid preliminary of shuttering panels executed in a form of plywood strips on temporary skywalks and racks on which then floor slabs are laid in design position. Channels of contact seams formed between slabs are closed from below by plywood strips with holes between which longitudinal bars are placed. Slinging turning joints are executed in a form of wire passed through holes in plywood strips round a longitudinal bar; wire ends are passed through a channel of contact seam and are fixed accordingly on each cross-section bar by their tommy screw among them. Warming up is made due to power supplies feed on wire tommy screws.

EFFECT: possibility of continuous operation and crack formation exception at carrying out of a laid concrete mix steam treatment.

7 cl, 4 dwg, 2 ex

FIELD: construction.

SUBSTANCE: invention refers to the sphere of construction and namely to the framework building with prestressing of reinforcement and the device for heating-up of grouted channels in the framework columns. Electric heating of sand-cement mixture in the channels of the framework columns is performed by means of electric heating elements from one or several insulated or nickel-chromium or tungsten or coal-fiber filament that are placed before grouting and form them in the channels either like a straight area or like a coil covering along the helical line previosuly strained ropes. Following grouting of the column with the sand-cement mixture electric heating elements are consequently or parallely connected to the DC or AC power supply, at this the temperature of each electric heating element is changed stepwise during heating within 40-60, 60-80, 80-100°C.

EFFECT: acceleration of the setting process of the sand-cement mixture in the channels and of possibility to perform construction works in the conditions of low temperatures.

2 cl, 5 dwg, 6 ex

FIELD: construction.

SUBSTANCE: invention is related to the sphere of construction, in particular, to method of butt jointing of ceiling plates with column and device for its implementation. Method includes preliminary fastening of mounting tables on column facets prior to its installation into design position floor by floor. Tables are formed with four support angles with protrusions that are tightened between each other with pins. Protrusions enter into grooves in column facets. Column is installed at design elevation and fixed in design position with the help of strainers. Strainers are installed into lugs of support angles. Consoles are connected to lugs of support angles fixed to columns that are installed in places of sideboard elements and/or balcony plates installation. Prior to ceiling plates allotment on the surface of support angles, horizontal veneer strips are installed with vertical veneer strips fixed to them. End of vertical strips is pressed to column facets, and their surface - to facets of ceiling plates in their allotment. Ceiling plates allotment onto horizontal veneer strips is done with clearance between column facets and ceiling plates, which is equal to 2-3 cm. After allotment of ceiling plates surfaces to be joined are soaked with water. Column facets are connected with slots of ceiling plates by means of stressed reinforcement. Reinforcement is installed through column channels on completion of clearances embedment. Clearances are filled with cement-sand mortar along the whole disk of ceiling plates. After mortar achieves design strength, tension force is transferred to concrete.

EFFECT: improvement of erection reliability, reduction of labour and material intensity.

2 cl, 3 dwg, 1 ex

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