Method of columns assembly and device for columns gripping

FIELD: construction.

SUBSTANCE: invention is related to the sphere of construction, namely, to method of columns assembly and device for columns gripping. Method of assembly of columns of crossbar-free frame of building includes preliminary installation of mounting tables on mounted column in horizontal position. Fixing of mounted column is carried out with the help of gripping mount with flexible sling. Flexible sling is fixed, embracing exactly half of column cross section on one side. On the other side the second equal half of column cross section is embraced with u-shaped metal bracket with lugs. Formation of gripping mount is carried out by means of flexible sling passage through bracket lugs. After lifting of mounted column and putting it in vertical position, column is lowered into foundation pile and vertically leveled. Foundation pile is fixed in head of mounted column. Mounted column is lowered until its lower end surface touches gasket on top end surface of mounted column. Gasket is rigidly fixed metal plate of square form. Area of plate is 0.4 times less than area of end surfaces of joined columns. After that strainers are fixed to lugs of mounting tables with their one side, and with their second side - to shoes. Shoes are fixed to the surface of ceiling plates. After strainers fastening flexible sling is removed by means of remote cable. Cable has been preliminarily inserted into rings fixed to u-shaped bracket. Then welding is done along perimeter of butt joint of columns end surfaces with interrupted seam in diagonally opposite sequence. At that gaps are left between welding seams of 20-25 mm. Cement-sand mortar is supplied to gaps until butt joint between end surfaces of columns are filled.

EFFECT: reduction of labour intensity and material intensity of erection.

2 cl, 3 dwg,1 ex

 

The invention relates to the field of construction and is intended for use in the erection of multi-storey buildings with columns of residential, public and industrial purposes, mainly with tension reinforcement in construction conditions.

Known joint connection of precast concrete columns and the method of its execution [patent RU No. 2233368, Appl. 17.10.2002], which includes the ends of joined columns with flat ends, these end sections contain indirect reinforcement in the form of transverse welded mesh and clamps, the ends of the rods longitudinal reinforcement of columns, the cutoff in the junction. In the end parts of the columns provided with channels filled with high strength mortar and containing reinforcing bars-the hand is the shorties. Between the ends of the columns in the gap has a centering strip. On the ends of the joined columns are made of the mechanical steel plate, is provided on the circuit in terms of surface contact with the concrete columns steel edging, these plates contain through holes for the passage of rebar-korotyshej. The gap also placed inserts in the form of individual steel plates. Mechanical steel plates joined columns on the lateral surfaces of the joint plate in the form of a steel strip, and airspace clearance filled with high strength mortar.

Under taccom known joint is the complexity of its implementation in construction, and effort required to perform splicing columns, requiring great precision in their manufacture.

A device for mounting columns [avts No. 893802, Appl. 12.04.1979]containing a spreader suspended by flexible rods rectangular frame, composed of interconnected beams, and Rostropovich device comprising a rod equipped with a cable remote control and a safety strap. Moreover, the connection beams in three corners of the frame are made by hinges, and in the fourth corner is made of coaxial holes for the rod.

A disadvantage of the known device is the use of it only for columns with exposed consoles, as well as a relatively high intensity.

A device for mounting columns with consoles [avts No. 1414951, Appl. 28.01.1987], including traverse with flexible pendants, on the axes are fixed gripper frame, equipped with placed between the axles suspensions consoles with corrugated reference sites and clamping devices, each of which is made in the form of two shoulders l-shaped lever with a perpendicularly attached thereto a bracket, one arm of the lever is installed on the axis of the elastic suspension and the other fixed to the latter, each reference site is located symmetrically relative activities is but the plane passing through the axis of the flexible suspensions, and the arms of the levers are oriented towards each other.

A disadvantage of the known device is the use of it only for columns with exposed consoles, the complexity of the design capture and rapid wear of the clamping elements in the zone of their contact. Large consumption of materials.

Known grip for lifting and installation of the columns [avts No. 1375554, Appl. 20.06.1985], containing a rectangular frame with eyes and a counterweight and a u-shaped bracket connected to the frame by flexible connection. A rectangular frame made of four lengths of pipe, forming its sides welded together at right angles. On the side of the frame, provided with a counterweight, and the opposite side is installed on the brackets rollers to facilitate removal of the frame with columns, with the first side of the rollers mounted in its lower part, and the second at the top. On the other two opposite sides of the fixed lugs for the lead frame hooks slings lifting device. U-shaped bracket consists of a beam, in the middle part to which the eyelet is fixed to another end of the flexible connection at the ends of cantilevers beams fixed vertical shelf with holes for mounting the locking device in the form of a rod.

The disadvantages of the known devices are complicated is the outer coat structure and having a mounting opening in the bottom of the column, this scheme slinging does not provide a strictly vertical columns when lifting and moving it to the place of installation that requires a great deal of complexity in the regulation of the column in the conductor when placing it vertically.

The closest analogue to the claimed invention is a method of mounting columns process of building frame [N. Danilov. and other Technology of construction processes. Moscow. "High school", 1997, s-272, 282, 283], which includes the consolidation column mounted with a gripping frame with a flexible strap mounted lifting columns with giving her the vertical position with the subsequent lowering in the conductor mounted on top of the installed column and align it vertically without removing the flexible sling, mounted to docking columns installed, then made a commit mounted columns by means of brace rods, remove the flexible sling, then do the welding.

The disadvantage of this method is the complexity of dismantling flexible sling after installation and fixing of columns in the project location, as well as the lack of pre-fastener installation tools.

The task of the developed method of installation of pillars is improving the technology of mounting columns with minimal effort using technical is one device, requiring little material costs.

Technical results that may be obtained from the use of the claimed invention for a method of mounting columns:

- reducing the time of installation;

- preliminary fixing of technological equipment on site to install columns;

- minimum deviation of the axes of the columns;

- the minimum number of installers for the device to capture columns:

- ease of use;

- low power consumption;

- small size;

- ease of disassembly.

The solution of the stated problem and achieve the above results, it became possible

for the method of installation of the columns, including the consolidation column mounted with a gripping frame with a flexible strap mounted lifting columns with giving her the vertical position with the subsequent lowering her guard, mounted on top of the installed column and align it vertically without removing the flexible sling, mounted to docking columns with fixed column, and then made a commit mounted columns by means of brace rods, remove the flexible sling, then perform welding while before lifting column mounted beforehand in a horizontal position set mounting tables under the floor slab of the upper floors, a flexible sling is ukreplyayut, covering exactly half of the cross-section of the column with one hand, and on the other hand, the second equal to half the cross-section of the column u-shaped metal bracket with lugs forming the gripping frame by skipping these lugs flexible sling mounting column is lowered until it touches the lower end surface of the gasket on the upper end surface of the installed columns, the strip used is rigidly fixed to the metal plate has a square shape, which has an area of 0.4 times smaller than the area of the end surfaces of joined columns, tie clip with one hand to the lugs of the mounting table, and the second to shoes, attached to the surface floor slabs, removing the flexible sling is produced by using the optional remote cable, missed previously in rings, attached to u-shaped metal clamp, welding is performed along the perimeter of the junction of the end surfaces of the columns intermittent seam in diagonally opposite sequence, leaving gaps between welds 20-25 mm, which serves cement-sand mortar to fill the joint between the end surfaces of the pillars;

for the device to capture columns, including a lifting hook with a flexible strap, gripping the frame, while the gripper frame is composed is of u-shaped metal bracket with lugs covering with one hand exactly half of the cross-section mounted columns, and a flexible strap passing through eyelets of this bracket and covering the second is equal to half the cross-section of the column on the other hand, the ends of the flexible strap fixed on the lifting hook with the possibility of tightening the flexible sling lifting hook together with u-shaped metal bracket, pressing and clamping them to the sides of the column, while the u-shaped bracket is provided with two rings, which skipped remote cable for dismantling of flexible sling and a u-shaped metal clips after you install the column on the design mark and it locks.

Inventive step is the creation of a method of mounting columns, providing additional acceleration in the construction of precast-monolithic buildings allowing for preliminary fixation mounting tables on columns according to the project marks for floor slabs subsequent floors at the construction site that provides the extension of the scope of work, reducing labor costs and providing a reduction of time required for the preparatory operation for mounting the upper floors, there is no need to lift installers to install each mounting table.

Lifting columns and further moving the exercise device is the your capture, represents a simple and very effective tool that easily assembled and simply dismantle, removal is made directly from the bottom, while on a disk mounted on the floor slabs without the use of lifting equipment for lifting installers in height.

A capture device for columns allows to achieve a strictly vertical position mounted columns when lifting and moving it to the place of installation. The connection interface columns with performing arc welding intermittent seam in diagonally opposite sequence eliminates the deviation of the axis of the column from the vertical and offset columns in the plan. The use of spacers in the form of a metal plate, which is 0.4 times smaller than the area of the end surface of the column, makes minimal effort to set the column vertically in the jig and avoid eccentric contraction caused by the deviation of the axis of the columns from the vertical, and also to eliminate noncompliance with elevations of columns. The application of the totality of marked structural solutions in the invention allows to achieve a strictly vertical position of the column, starting from the rise and ending rigid fixing of the column, this significantly reduces the labor costs for installation and reduces the time.

The gap between styche the s end surfaces of the columns of cement-sand mortar between welds increases the reliability of the connection, protecting the contact area of the junction of the columns from corrosion.

Fixing columns using couplers requires little cost, because the tie one end is fixed directly to the mounting table, installed previously, and the second to special boots which is convenient in installation and are located on the disk mounted on the floor slabs.

The inventive method of mounting columns helps to reduce labor costs to a minimum, since the operation to capture and move the column to the place of installation are two of the installer. The dismantling of the capture after you install the column in the design position produces one fitter, being at the bottom of the disk floor slabs using only the remote control cable.

The claimed invention is illustrated in the following figure.

Figure 1. Shows the column in the phase of installation; the conductor, a flexible sling, lifting hook, u-shaped metal bracket with rings, mounting loop, remote cable, cable ties, mounting tables, shoes, slabs, strip, installed column.

Figure 2. The movie rise of the mounted column containing mounting loop, the gasket and the mounting groove together with a device for gripping comprising a flexible sling, u-shaped metal bracket with rings and remote cable.

Figure 3. The end surface of the installed columns; Rockledge, the sequence of weld seams, gaps.

Installation of the column is performed by the capture device for (1)comprising a lifting hook 1 with the flexible strap 2, the gripping frame (not shown)consisting of a u-shaped metal bracket 3 with lugs (not shown), covering on the one hand, exactly half of the cross-section mounted column 4, located on the construction site (not shown), where the pre-mounted to the mounting tables 5 through mounting slots 6 in accordance with the project marks the placement of the floor slab 7 (1-2), and a flexible sling 2, passed through the eyelets of the u-shaped metal bracket 3, located near the mounting loop 8 (1-2)covers the second is equal to half the cross-section of the column 4 on the other hand, with the ends of the flexible sling 2 fixed on the lifting hook 1. U-shaped metal bracket 3 is equipped with two rings 9, which are skipped remote cable 10. Mounted on the disk (not shown) of the floor slabs 7, formed by the connection of the installed columns 11 and floor slabs 7 by the tension of the cable fittings (not shown)is placed and fixed on the tip (not shown) installed column 11 and the conductor 12, resting on the floor plate 7 (Fig 1), and the end surface of the installed column 11 contains a hard-coded in rublennuju gasket 13 (Fig.1-3). Screed 14 is secured at one side to the lugs (not shown) mounting tables 5 and from the second side to the pads 15, which are mounted on the floor slab 7. Fix final column mounted performed using a discontinuous weld seams (not shown) in diagonally opposite sequence 16, 17, 18, 19, 20, 21, 22, 23 with gaps 24 between welds (figure 3).

The installation method is as follows. When lifting the lifting hook 1 draw flexible sling 2 missed lugs (not shown) of the u-shaped metal bracket 3, pressing together and clamping them to the sides (not shown) mounted columns 4 and begin a gradual climb up together with the mounting table 5 until this column will tighten flexible sling 2 with u-shaped metal bracket 3 by the force of its own weight (figure 2) and upright. Followed by moving the mounted column 4 to the place of its installation, then slowly bring in the conductor 12 (Fig 1), to touch its lower end surface (not shown) gasket 13, rigidly attached to the upper end surface (not shown) installed columns 11, which gives the possibility to adjust the vertical. Keeping fully assembled column 4 on the gasket 13 (Fig.1-3), produce alignment of the axes of joined columns 4 and 11 (figure 1) using a regulate is cnyh screws (not shown) of the conductor 12. After matching design elevations produce pre-mounted fixing columns 4 screws (not shown) of the conductor 12, an additional fixation of the column is carried out by means of tie-rods 14, which on the one hand fixed to the lugs (not shown) of the mounting table 5, attached to the mounted column, and on the other side to the shoes 15, fixed to the floor slab 7. After additional fixation mounted column 4 produces the dismantling of a gripper (not shown), which is fully lowered flexible sling 2 to final discharge, then use the remote cable 10 cloth u-shaped metal bracket 3, when in drive and floor slab 7, until flexible sling 2 will come out from the eyes of a specified u-shaped bracket 3, releasing the engagement with the mounted column 4 (figure 1).

After the above operations, perform final fixation using electric arc welding the joining surfaces mounted columns 4 and set the column 11 on the perimeter of interrupted sutures (not shown) in diagonally opposite sequence 16, 17, 18, 19, 20, 21, 22, 23 (3), leaving a gap 24 between welds equal to 20-25 mm In the resulting gap is produced by injectiona special cement-sand mortar to fill mezhstekolnogo space of smontirovan the x columns. Upon completion of the process seminolecounty interface columns are transferred to the installation of the following, which are mounted in the same way.

A capture device for columns allows to provide upright position mounted columns after its rise and in its further movement to the place of installation. The use of spacers in the form of a metal plate of smaller area 0.4 times compared with the end surfaces of columns, allows easy adjustment of the vertical location of the column through her movements in the conductor, providing the required number of degrees of freedom, since the gasket is placed squarely in the center of the end surface of the columns. Welding the perimeter of the joining surfaces of the columns in a specific sequence 16, 17, 18, 19, 20, 21, 22, 23 (3) eliminates the offset of the axes of the columns from the design position when the adhesion of the metal in the joint area of the columns. All identified technical solutions allows to achieve a strictly vertical columns on the entire process of installation of the column.

The inventive method of installation of the columns significantly reduces the time for the erection of the building frame, as all technological equipment mounted under the floor slab of the upper floors, which also need to fix the AI mounted columns, installed at a construction site before the installation of the columns. A capture device for columns is easily installed and even with the lowest complexity is dismantled at the end of the detent mounted columns. The application of the strip with the ratio of the areas is equal to 0.4 at the end surface, allows you to freely maneuver in the conductor moving columns without creating difficulties, which consequently saves time and simplifies the process of adjusting the vertical.

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

Example.

During the construction process of frame buildings and structures with tension reinforcement in construction conditions column mounted as follows. Directly on the construction site mounted on columns generate fastening of the mounting tables due to implemented it mounting grooves in accordance with the design placement of the floor slabs, which set later on these tables. Then taking the mounted columns using a grip that includes a u-shaped metal bracket attached to the rings, in which previously skipped remote cable, the bracket is placed in the upper part of the column mounted near the mounting loop, while it is placed on the mount is alone so, to cover exactly half of the cross-section of the column with one hand. Then, in the eyes of this bracket are pulled flexible sling, which covers the second is equal to half the cross-section mounted columns, and its ends are fixed on the lifting hook. After that carry out a smooth rise of the column, until it will not tighten flexible lanyard with u-shaped metal bracket and press them by force of its own weight to the faces of the assembled column. Then mounted the column moves to the place of installation of the lifting machine, gently lowering it to the conductor, mounted on top of the installed column and based on the assembled slabs. Mount the column is lowered until then, until it touches the strip, made in the form of a metal plate has a square shape, which is 0.4 times smaller than the area of the end surfaces of joined columns. Then make the alignment of the axes of the columns using the adjustment screws of the conductor, achieving a vertical column mounted with simultaneous fixing the appropriate location in this conductor. Additional fixation of the column is carried out with the help of ties, which on the one hand fixed to the mounting lugs of the tables posted on the mounted column, and on the other the shoes are attached to p is the it overlaps. After mounting the required number of wraps to mount the column to produce the dismantling of capture, for which the cloth is u-shaped metal bracket through the remote wire being directly on the floor slab constructed floor. Then perform electric arc welding around the perimeter of the end surfaces of joined columns intermittent seam, starting at any corner and continuing in a strictly diagonally opposite sequence. Moreover, the gap between welds leave 20-25 mm In this connection interface adhesion strength of the metal between them have a mutual opposition, which eliminates the offset of the column from the vertical.

Upon completion of the welding process perform the joining surfaces of the monolithic interface, for which the gap between the welds serves cement-sand mortar to fill mezhstekolnogo space mounted columns. Produced in this way the installation of the columns can significantly reduce labor costs and to accelerate the pace of construction in General.

Features:

Installation time one column, h0,92
Time dismantling capture, min5,0
The time of welding the joining surfaces, h1,2÷1,3
In EMA injection mezhstekolnogo space, minutes3,0
The number of installers not more people.3,0
The deviation of the axes of the columns from the design position, %±5,0
Mass capture, kg18÷20,0

The inventive method of installation of pillars and a capture device for columns reduce the time of construction of buildings, because the average installation time of one column is 0.92 hours, and dismantling capture takes just 5 minutes. The join of columns by the claimed method allows to ensure a quality installation with the deviation of the axes of the columns from the vertical is not more than 5.0%, including a set of application strip together with performing arc welding on the perimeter of the end surfaces of the columns intermittent seam in diagonally opposite sequence. This connection not only increases the quality of installation of the columns, but also increases the bearing capacity of the building frame, because the deviation from the vertical position creates additional eccentricities in the application of longitudinal forces, causing eccentric compression. The application claimed capture for columns allows you to raise and further transport to place of installation as well as dismantling capture directly from the fixed disk floor slabs using on the tion of the installer. This reduces both the complexity and the intensity due to the use of design capture low-mass, equal to a total of 18÷20 kg, and preliminary fixation mounting tables on columns for project marks for floor slab of each floor is done directly on site, ensuring all listed together to accelerate the pace of construction of buildings and structures.

1. The method of installation of pillars process of building frame, including the consolidation column mounted with a gripping frame with a flexible strap mounted lifting columns with giving her the vertical position with the subsequent lowering her guard, mounted on top of the installed column and align it vertically without removing the flexible sling, mounted to docking columns with fixed column, and then made a commit mounted columns by means of brace rods, remove the flexible sling, then do the welding, characterized in that before lifting column mounted beforehand in a horizontal position set mounting tables under the floor slab of the upper floors, a flexible sling fix, covering exactly half of the cross-section of the column with one hand, and on the other hand, the second equal to half the cross-section of the column p-clicks the heat metal bracket with lugs forming a gripper frame by skipping these lugs flexible sling mounting column is lowered until it touches the lower end surface of the gasket on the upper end surface of the installed columns, the strip used is rigidly fixed to the metal plate has a square shape, which has an area of 0.4 times smaller than the area of the end surfaces of joined columns, tie clip with one hand to the lugs of the mounting table, and the second to shoes, attached to the surface of the floor slab, removing the flexible sling is produced by using the optional remote cable, missed previously in rings, attached to u-shaped metal clamp, welding perform along the perimeter of the junction of the end surfaces of the columns intermittent seam in diagonally opposite sequence, leaving gaps between welds 20-25 mm, which serves cement-sand mortar to fill the joint between the end surfaces of the columns.

2. A capture device for columns, including a lifting hook with a flexible strap, gripping the frame, characterized in that the gripper frame made up of u-shaped metal bracket with eyes, covering on the one hand, exactly half of the cross-section mounted columns, and a flexible strap passing through pros the us this bracket and covering the second is equal to half the cross-section of the column on the other hand, the ends of the flexible strap fixed on the lifting hook with the possibility of tightening the flexible sling lifting hook together with u-shaped metal bracket, pressing and clamping them to the sides of the column, while the u-shaped bracket is provided with two rings, which skipped remote cable for dismantling of flexible sling and a u-shaped metal clips after you install the column on the design mark and it locks.



 

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