Method of bored pile construction and device for method implementation

FIELD: construction.

SUBSTANCE: invention concerns bored pile construction in any soil environment, and can be applied in industrial and civil construction for construction of new foundations and reinforcement of existing ones, as well as in construction of supports bearing alternate loads. Method involves well drilling by drilling assembly consisting of drilling column and rock crusher, filling the well with solidifying mix, drilling column extraction from well, downtake of metal frame. Well drilling is performed with crushed rock discharge to surface by flush liquid or compressed air fed to bottomhole through hollow drilling column. Simultaneously with well drilling, metal frame made of reinforcement rods with helical flange at external surface is taken down by rotation. Frame is mounted coaxially along drilling column and can rotate together with it. Drilling column is extracted from well together with rock crusher, along with uninterrupted filling of well with solidifying mix through hollow drilling column.

EFFECT: enhanced efficiency of bored pile construction, improved manufacturing quality, enhanced life time and strength of pile.

4 cl, 3 dwg

 

The group of inventions relates to the construction, in particular to the construction of bored piles in all soil conditions, and can be used in industrial and civil construction for the construction of new and the strengthening of previously constructed foundations, and building supports, perceiving alternating loads.

There is a method of construction of bored piles in soil and device for its implementation, where the casing hollow tube with a tip at the bottom and spiral wrapped on the outer surface immersed in the soil to the design elevation due to the simultaneous rotation and its indentation. Then in the cavity of the tube is placed a metal frame and fill it with concrete, and then to hardening of concrete pipe vivencial from the soil or left in the ground (RF Patent No. 2208088, CL E02D 5/56, publ. 10.07.2003).

This method has several disadvantages. Immersion in sustainable soil requires a large amount of power, and therefore heavy and bulky drilling equipment. Lose the Shoe increases the cost of building piles. The filling of the casing after installing a metal frame does not ensure the formation of a protective layer of regulatory thickness around the valve, which reduces the durability of the pile.

A known method of construction of bored piles, taken as a prototype and including PR is a move well drill, consisting of a drill string and a rock cutting tool, filling wells hardening the mixture, removing the drill string from the borehole; lowering a metal frame (see EN 2278212, CL E02D 5/56, publ. 20.06.2006).

It is also known a device for the construction of bored piles, adopted as a prototype and includes a drilling string comprising a drill string and a rock cutting tool (see EN 2278212, CL E02D 5/56, publ. 20.06.2006).

The disadvantages of these methods and devices should include the necessity of using heavy drilling equipment to push the projectile into the ground during the construction of the piles, which limits its scope. Lose the rock-breaking tool increases the cost of the piles. The need for additional reinforcement of the piles after removing the drill reduces the performance of its installation. In the formation of the bore of larger diameter than the calculated diameter piles, metal frame will not be strictly centered on its axis along the length of the piles, which will affect its stability and bearing capacity.

The aim of the invention is to increase the productivity of the construction of bored piles, the quality of its manufacture, to increase the durability and strength of the piles.

This objective is achieved in that in the method of construction of bored piles, including p is kodku well drill, consisting of a drill string and a rock cutting tool, filling wells hardening the mixture, removing the drill string from the borehole; lowering a metal frame, according to the invention a borehole drilling exercise with the issuance of destroyed rocks on the surface by drilling fluid or compressed air pumped downhole through the drill string, is made hollow, simultaneously with the sinking of wells produce descent with the rotation of the metal frame, made of reinforcing bars with screw flange on its outer surface and is installed along the drillstring coaxially with it to rotate with it, while the drill string is pulled out of the well together with the rock body with the continuous filling of the well-curing the mixture through a hollow drill string.

In the part of the device, this objective is achieved in that it includes a drilling string comprising a drill string and a rock cutting tool, and according to the invention equipped with a metal frame made of reinforcing bars with screw flange on its outer surface, mounted along the drillstring coaxially with her and for rotation with it by sliding the hinge elements attached to the adapter, which connected the drill string, made hollow, with the rock cutting tool made with folding in the axial direction of the work items to retrieve the drilling string from the well, while in the case of the adapter is made through the window for a message cavity of the drill string with the cavity of the well.

Reinforcing bars can be interconnected by means of flanges with the slots to accommodate them.

In addition, the device may be provided with a supporting sleeve that is installed in the metal frame with the ability to transfer axial forces from the drilling Assembly by sliding the hinge elements.

The invention is illustrated in the drawings, in which figure 1 shows the device in operating position; figure 2 - cross section along a-a in figure 1; figure 3 is a device in the transport position.

Device for the construction of bored piles includes a drilling string comprising a drill string 2 and rock cutting tool 3 and the metal frame, made of reinforcing bars 9 with screw flange 13 on its outer surface. Metal frame installed along the drill string 2 coaxially with it. Screw the flange 13 provides additional rigidity to the metal frame and centers the frame in the hole, virtually eliminating the deviation of its axis from the axis of the pile, because the gap between the walls of the borehole 1 and what bordoy 13 minimum. Metal frame is rotatably together with the drillstring 2 by sliding the hinge elements 8, a hinge mounted in the longitudinal cavity 6 of the body of the adapter 5. In the working position retractable hinge elements 8 pass through the reinforcing rods 9 metal frame, passing it a spin. The adapter 5 connects the drill string 2 with the rock cutting tool 3. Rock cutting tool 3 is designed with a fold in the axial direction of the working elements 4 to enable extraction of the drilling Assembly from the wellbore 1. For the message of the hollow drill string with the cavity of the well drill string 2 is made hollow, and in the body of the adaptor 5 is a through Windows 7.

Reinforcing rods 9 may be interconnected by means of flanges 12, made in the form of pins and bushes with a Central hole 14, with the slots 11 to accommodate them "flush".

The device may be provided with a supporting sleeve 10 that is installed in the metal frame with the ability to transfer axial forces from the drilling Assembly by sliding the hinge elements 8, as in this case, the sliding hinge elements 8 rest against the upper end of the supporting sleeve 10.

The method is as follows. On the surface going drilling string in metal is practical framework for future piles. When this hollow drill string 2 with the adapter 5 is lowered to the bottom base metal frame. Set sliding elements 5 in a horizontal position, and then upon further lowering of the drill string 2 sliding elements 5 rest against the upper end of the supporting sleeve 10 and go for reinforcing rods 9. The lower end of the adapter 5 wrapped around a rock cutting tool 3 with the folding in the axial direction of the working elements 4. The upper end of the drilling Assembly connected to the top bar of the drilling rig (Fig. not shown) and produce a borehole drilling 1. Well 1 is traversed by the proposed device with removal of the destroyed rocks on the surface of the washing liquid or compressed air to the design depth of the piles with the simultaneous immersion of a metal frame with rotation transmitted to him sliding hinge elements 8, passing through the reinforcing rods 9.

1. The method of construction of bored piles, including borehole drilling drill, comprising a drill string and a rock cutting tool, filling wells hardening the mixture, removing the drill string from the borehole; lowering the metal frame, wherein the borehole drilling exercise with the issuance of destroyed rocks on the surface by washing the offered liquid or compressed air, applied to the face through the drill string, is made hollow, simultaneously with the sinking of wells produce descent with the rotation of the metal frame, made of reinforcing bars with screw flange on its outer surface and is installed along the drillstring coaxially with it to rotate with it, while the drill string is pulled out of the well together with the rock cutting tool for continuous filling of the well-curing the mixture through a hollow drill string.

2. Device for the construction of bored piles, including drilling string comprising a drill string and a rock cutting tool, characterized in that the device has a metal frame, made of reinforcing bars with screw flange on its outer surface, mounted along the drillstring coaxially with her and for rotation with it by sliding the hinge elements attached to the adapter, connecting with a drill string, is made hollow, with the rock cutting tool made with folding in the axial direction of the work items to enable extraction of the drilling string from the well, while in the case of the adapter is made through the window for a message the hollow drill string with a cavity SK is ageny.

3. The device according to claim 2, characterized in that the reinforcing rods are interconnected by means of flanges with the slots to accommodate them.

4. The device according to claim 2, characterized in that the device has a support sleeve that is installed in the metal frame with the ability to transfer axial forces from the drilling Assembly by sliding the hinge elements.



 

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FIELD: construction industry.

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5 cl, 7 dwg

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The invention relates to the construction of pile foundations for civil and industrial constructions

The invention relates to the construction of pile foundations for civil and industrial constructions

The invention relates to the field of construction

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7 cl, 8 dwg

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5 cl, 5 dwg

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5 cl, 7 dwg

FIELD: construction, methods or apparatus for placing sheet pile bulkheads, piles, mould-pipes, or other moulds by screwing down, namely for electric plant mounting.

SUBSTANCE: device comprises frame, guiding pipe with clamp, reduction gear with gear-wheels and bearings. Guiding pipe, driving gear-wheel and bearings are made as two sectional parts and provided with hinges from the first sides and with locks from the second sides thereof to join up all parts in single rigid structure. All hinges are coaxially arranged.

EFFECT: extended field of screw grounding electrode usage during grounding devices installation, increased structural simplicity, decreased weight and costs, increased reliability and operational safety, possibility of device usage in the case of power source absence or in territories unsuitable or unfavourable for another equipment usage.

3 cl, 3 dwg

FIELD: construction industry.

SUBSTANCE: method of installing tubular pile in permanently frozen earth involves rotation of pile and its simultaneous vertical movement under influence of pressing axial load applied to the pile. At that speed of vertical pile movement Vm, value of pressing axial load Pt and angular speed of pile rotation ω are controlled using a nomogram built in logarithmic coordinate system wherein along x-axis there marked are magnitudes of the value (athth) that comprises the ratio of thermal conductivity of thawed earth ath to thickness of thawed earth seam under pile edge δth, and along y-axis there marked are values of speed of vertical pile movement Vm. Nomogram consists of two families of Vm-vs-(athth) curves based on calculations of thermal, mechanical and hydrodynamic processes when installing the pile. The above nomogram provides the possibility of choosing the speed of vertical pile movement Vm, depending on pile size and specific earth properties, when Pt and ω are available, as well as the possibility of choosing pressing axial load Pt and angular speed of pile rotation ω when Vm and ath, δth are available.

EFFECT: improving the accuracy of parametrisation of pile installation mode.

3 cl, 2 dwg

FIELD: construction.

SUBSTANCE: invention concerns bored pile construction in any soil environment, and can be applied in industrial and civil construction for construction of new foundations and reinforcement of existing ones, as well as in construction of supports bearing alternate loads. Method involves well drilling by drilling assembly consisting of drilling column and rock crusher, filling the well with solidifying mix, drilling column extraction from well, downtake of metal frame. Well drilling is performed with crushed rock discharge to surface by flush liquid or compressed air fed to bottomhole through hollow drilling column. Simultaneously with well drilling, metal frame made of reinforcement rods with helical flange at external surface is taken down by rotation. Frame is mounted coaxially along drilling column and can rotate together with it. Drilling column is extracted from well together with rock crusher, along with uninterrupted filling of well with solidifying mix through hollow drilling column.

EFFECT: enhanced efficiency of bored pile construction, improved manufacturing quality, enhanced life time and strength of pile.

4 cl, 3 dwg

FIELD: construction.

SUBSTANCE: device for screwdriving of piles is related to construction and may be used for erection of bearing foundations, fixation of various mechanisms and devices on soil, also under conditions of frozen soils in process of screwdriving of metal tubular piles. Device comprises spinner 1, reducer 2 and cartridge 3, which is arranged in the form of bushing with longitudinal slot and horizontal axis. Lower part of cartridge 3 is equipped with grips with handle and spring-loaded fixator, besides grips have dead slots. Horizontal axis is made with cylindrical protrusions at ends, and longitudinal slots of bush are arranged as stepped and closed. Device may additionally be equipped with the second horizontal axis, detachable pad made of two plates, in which holes are arranged for horizontal axes, at the same time in one of plates holes are made with figure shape, and at one end of horizontal axes there are slants arranged with similar figure shape.

EFFECT: invention makes it possible, due to reduction of time for pile preparation for lift, its fixation in cartridge, to significantly increase efficiency of works on piles driving, and also to improve conditions of work, since all works are carried out not at height, but on ground, in close proximity to area of pipe screwdriving.

2 cl, 10 dwg

FIELD: construction.

SUBSTANCE: method for making well for rolled-screw pile including drilling of conventionally cylindrical well. Roller unit and step accessory are connected to auger, device rotation is actuated for thread rolling, roller unit is brought into well, and thread making is started with the help of three rollers with various diametres and thicknesses in the form of truncated cone each, which are serially rolled one after another, and soil is impressed into well wall with angle of thread inclination between plane, where large wheel of each roller is located, and axis of roller unit rotation, making 76 degrees. Master roller executes primary rolling of thread, then intermediate roller of larger diametre and thickness expands groove, increasing thread dimension, and shaping roller of larger size completes soil compaction into well wall and thread rolling. Pitch, which provides for step accessory on auger per single complete rotation of shaping roller equal to 360 degrees makes 0.67 d, where d is diametre of roller unit pipe, and thread pitch corresponds to pitch of single turn of auger blade. Step accessory operates only in process of thread rolling together with rolling unit, and thus thread is rolled for the whole depth of well, reverse rotation is started, and roller unit is brought upwards along shaped thread, afterwards well is inspected and concreted. Device for method realisation comprises auger for drilling of conventionally cylindrical well, device for thread rolling made of roller unit, auger and step accessory. Roller unit includes steel pipe with diametre d with slots for rollers, steel bushings for axles of rollers, master roller with diametre of 0.52 d, intermediate roller with diametre of 0.71 d, shaping roller with diametre of 0.83 d, cover with tail, bottom. All three rollers are arranged as steel and are shaped as truncated cone, and straight line that coincides with diametre line of large wheel in each roller, crossing axis of roller unit rotation, is perpendicular to generatrix of pipe cylindrical surface in point of their crossing, and plane of each roller fit, i.e. plane of roller unit rotation axis crossing with point of crossing of roller rotation axis and large wheel of roller are at the angle of 120 degrees to similar plane of fit of each of two rollers.

EFFECT: simpler, affordable and cheaper arrangement of well for rolled-screw pile of high bearing capacity with the help of facilities for well drilling.

7 cl, 5 dwg

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