Adjustable pile body limiting device for prestressed pipe pile planting construction

Abstract

The utility model discloses a prestressed pipe pile planting construction adjustable pile body limiting device which comprises a horizontally-arranged roadbed box, a limiting support arranged on the roadbed box and an adjustable limiting hoop fixedly connected with the limiting support, a through opening is formed in the center of the limiting support, and a prefabricated pipe pile penetrates through the through opening to sink into a pile hole. The adjustable limiting hoop is mounted on the limiting bracket; the adjustable limiting hoop comprises two semicircular steel plates with the side faces spliced, the semicircular steel plates surround the side wall of the prefabricated pipe pile, thickness adjusting square steel is arranged in a gap formed by splicing the two sides of the semicircular steel plates, a movable bolt groove hole is formed in the limiting support, and a movable bolt is arranged in the movable bolt groove hole. The device has the functions of limiting a pile body, temporarily fixing a precast pile and bearing a high-pressure grouting pipe, and can effectively guarantee the pile planting construction perpendicularity of the prestressed pipe pile and the pile splicing and pile forming quality.

Description

Technical Field

[0001] The utility model relates to the technical field of building construction, and more specifically to an adjustable pile body limiting device for prestressed pipe pile planting construction. Background Art

[0002] Prestressed pipe piles are usually constructed by mechanical boring and pile planting in areas with hard strata or complex geological conditions. Due to the deep boring depth and the hole diameter being 100 to 200 mm larger than the diameter of the pipe pile, when the pipe pile sinks, if no pile body limiting measures are taken, the verticality of the pipe pile and the uniformity of the anchor slurry thickness during grouting around the pipe pile cannot be guaranteed. When the designed pipe pile depth is long and one prefabricated pile cannot meet the length requirement, it is often necessary to prefabricate in sections and connect the piles by welding. In order to ensure the quality of multi-section pile connection, the pile connection construction also requires the temporary fixation of the next section of the pipe pile body.

[0003] In the traditional method of lifting and connecting prefabricated pipe piles, the crane is not loosened or only steel pipes are used for temporary auxiliary fixing and limiting. This has a high safety risk and the quality of the pile connection construction and the verticality of the pile body cannot be guaranteed. In addition, if there is no supporting and fixing measures for the grouting pipe during the high-pressure grouting construction around the pipe pile, it is difficult to ensure that the grouting is carried out evenly and symmetrically, which affects the quality of the pile. Therefore, it is necessary to provide a pile body limiting device for prestressed pipe pile construction that can effectively solve the above problems. Utility Model Content

[0004] In view of the above defects or improvement needs of the prior art, the utility model provides an adjustable pile body limit device for prestressed pipe pile planting construction, which can be used for pile body limitation, temporary fixation of prefabricated piles and supporting high-pressure grouting pipes, and can effectively ensure the verticality of prestressed pipe pile planting construction and the quality of pile connection and pile formation.

[0005] In order to achieve the above-mentioned purpose, according to the utility model, there is provided an adjustable pile body limit device for prestressed pipe pile planting construction, comprising a horizontally arranged roadbed box, a limit bracket arranged on the roadbed box, and an adjustable limit clamp fixedly connected to the limit bracket, wherein a through opening is arranged at the center of the limit bracket, and the prefabricated pipe pile is sunk into the pile hole through the through opening, and the adjustable limit clamp is installed on the limit bracket; the adjustable limit clamp comprises two semicircular steel plates spliced ​​together on the side, the semicircular steel plates embrace the side walls of the prefabricated pipe pile, and square steels of adjustable thickness are arranged in the gaps spliced ​​together on both sides of the semicircular steel plates, and movable bolt slots are arranged on the limit bracket, and the semicircular steel plates are bolted to the limit bracket through the movable bolt slots.

[0006] During work, two semicircular steel plates are fixed around the outside of the pile body, and then the bottom of the semicircular steel plates are fixed to the limit bracket to achieve rapid limit support for the pile body. The spacing between the semicircular steel plates and the pile body can be easily adjusted by adding adjustable thickness square steel in the gap between the two semicircular steel plates. The movable bolt slots can be set to adjust the fixed position of the bottom of the semicircular steel plates according to the spacing, so as to achieve the functions of quickly adapting to the pile body limit, temporarily fixing prefabricated piles and supporting high-pressure grouting pipes.

[0007] Furthermore, the limit bracket is welded from four square steel pipes, which enclose a square opening. The lower parts of the four square steel pipes are spot welded and fixed on the roadbed box. The formed square opening can be preliminarily aligned with the pile hole at the bottom, which is convenient for lowering the prefabricated pipe piles.

[0008] Furthermore, the four square steel tubes include two long square steel tubes and two short square steel tubes which are respectively arranged in parallel, and the two short square steel tubes are welded to the inner side of the long square steel tubes.

[0009] Furthermore, the connecting steel plates are radially welded and fixed at the side connections of the two semicircular steel plates. After the two semicircular steel plates are buckled together, the connecting steel plates are fixed separately by connecting bolts. The connecting steel plates are fixed by bolts, so that the two semicircular steel plates can be quickly spliced ​​and fixed, thereby improving construction efficiency.

[0010] Furthermore, a plurality of first stiffening plates are welded to reinforce the connection between the middle portion of the connecting steel plate and the outer side of the semicircular steel plate.

[0011] Furthermore, a vertical stiffening plate is welded to the middle of the outer arc of the semicircular steel plate, a second stiffening plate is welded to the middle of the vertical stiffening plate, a mounting steel plate is welded to the bottom of the vertical stiffening plate, bolt holes are provided on the mounting steel plate, and the semicircular steel plate is fixed to the surface of the limiting bracket by passing an adjusting bolt through the bolt hole and the adjusting bolt slot.

[0012] Furthermore, a notch is provided on the thickness-adjustable square steel, and the notch is used for the connecting bolt to pass through.

[0013] In general, the above technical solutions conceived by the utility model can achieve the following beneficial effects compared with the prior art:

[0014] (1) The utility model provides an adjustable pile body limit device for prestressed pipe pile installation construction. The device has three functions: pile body limit, temporary fixation of prefabricated piles, and support for high-pressure grouting pipes. It can effectively ensure the verticality of prestressed pipe pile installation construction and the quality of pile connection and pile formation.

[0015] (2) The utility model provides an adjustable pile body limit device for prestressed pipe pile construction. The structure of the device is simple and stable, the gap between the device and the pile body can be quickly adjusted, and the disassembly and assembly is convenient and fast, with high construction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the general assembly of the prefabricated pipe pile body limiting device during the pile connection construction in the embodiment;

[0017] Figure 2 Schematic diagram of the limiting bracket in the embodiment;

[0018] Figure 3 Schematic diagram of an adjustable limit clamp in the embodiment;

[0019] Figure 4 It is a top view of the prefabricated pipe pile body limiting device during the pile connection construction in the embodiment;

[0020] Figure 5 It is a side view of the limiting device during the precast pile sinking construction in the embodiment;

[0021] Figure 6 It is a top view of the limiting device during the precast pile sinking construction in the embodiment;

[0022] Figure 7 Schematic diagram of adjusting the thickness of the square steel pipe in the embodiment.

[0023] In all the drawings, the same figure marks represent the same technical features, specifically: 1. Roadbed box; 2. Limit bracket; 3. Adjustable limit clamp; 4. Prefabricated pipe pile; 5. Long square steel pipe; 6. Short square steel pipe; 7. Movable bolt slot; 8. Adjusting bolt; 9. Semicircular steel plate; 10. Connecting steel plate; 11. First stiffening plate; 12. Connecting bolt; 13. Vertical stiffening plate; 14. Second stiffening plate; 15. Installation steel plate; 16. Bolt hole; 17. Adjustable thickness square steel. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the utility model and are not used to limit the utility model. In addition, the technical features involved in each embodiment of the utility model described below can be combined with each other as long as they do not conflict with each other.

[0025] like Figure 1-Figure 4As shown, this embodiment provides an adjustable pile body limit device for prestressed pipe pile construction, comprising a roadbed box 1 horizontally arranged on the site, a limit bracket 2 placed on the roadbed box 1, and an adjustable limit clamp 3 fixedly connected to the limit bracket 2, the adjustable limit clamp 3 is arranged around the side wall of the prefabricated pipe pile 4, after the pile hole is mechanically pre-drilled on the site and before the prefabricated pipe pile 4 is sunk, the soil around the pile hole is leveled and compacted, and multiple roadbed boxes 1 are laid around the pile hole, the roadbed box 1 is a flat plate structure, and the roadbed box 1 is used as a base. It is the installation and load-bearing foundation of the limit bracket 2. The center of the limit bracket 2 is enclosed to form a through opening for the prefabricated pipe pile 4 to pass through and then sink into the pile hole. An adjustable limit clamp 3 is fixedly installed on the upper part of the limit bracket 2. The adjustable limit clamp 3 is limited by splicing and pasting a plurality of semicircular steel plates 9 on the side wall of the prefabricated pipe pile 4. The semicircular steel plate 9 is fixed to the limit bracket 2 with bolts. A movable bolt slot 7 is set on the limit bracket 2 to adjust the position of the semicircular steel plate 9 to adapt to the installation of prefabricated pipe piles 4 of different diameters.

[0026] Furthermore, if Figure 2 As shown, the limit bracket 2 is welded by four square steel pipes, which are enclosed to form a square opening, and the pile hole is centered below the opening. The lower part of the square steel pipe is fixed to the roadbed box 1 by bolts or spot welding. The four square steel pipes include two long square steel pipes 5 and two short square steel pipes 6 respectively arranged in parallel. The two short square steel pipes 6 are welded to the inner side of the long square steel pipe 5, and the opening is square. Preferably, the side length is 50mm larger than the pile diameter of the prefabricated pipe pile 4. Two rows of adjustment bolt slots 7 are respectively arranged in the middle of the two long square steel pipes 5. The fixing bolts can be translated in the adjusting bolt slots 7 to adjust the fixed position, thereby adjusting the spacing of the semicircular steel plates 9.

[0027] Furthermore, if Figure 1-Figure 5 As shown, the adjustable limit clamp 3 is composed of two semicircular steel plates 9 assembled into a cylindrical structure, the diameter of the semicircular steel plate 9 is the same as the diameter of the prefabricated pipe pile 4, preferably, the height of the semicircular steel plate 9 is 500mm, the thickness of the semicircular steel plate 9 is 15mm-18mm, the side connection of the two semicircular steel plates 9 is radially welded and fixed with a connecting steel plate 10, and the two semicircular steel plates 9 are buckled and the connecting steel plates 10 are respectively fitted. Preferably, four bolt holes are evenly arranged on the connecting steel plate 10, the thickness of the connecting steel plate 10 is 20mm, and the connecting bolts 12 are used to fix the fitted connecting steel plates 10, and the adjustable limit clamp 3 is sleeved on the outside of the prefabricated pipe pile 4.

[0028] Furthermore, a plurality of first stiffening plates 11 are welded to reinforce the connection between the middle of the connecting steel plate 10 and the outer side of the semicircular steel plate 9. Preferably, the first stiffening plate 11 is horizontally arranged in a triangular shape with a thickness of 15 mm and is perpendicular to the side walls of the connecting steel plate 10 and the semicircular steel plate 9 respectively.

[0029] Furthermore, a trapezoidal vertical stiffening plate 13 is vertically welded in the middle of the outer arc of the semicircular steel plate 9. Specifically, the vertical stiffening plate 13 forms an angle of 90° with the connecting steel plate 10. A second stiffening plate 14 is welded in the middle of the vertical stiffening plate 13 to improve the structural strength so that the semicircular steel plate 9 can be effectively supported when restricting the prefabricated pipe pile 4. The side of the vertical stiffening plate 13 extending toward the bottom end of the semicircular steel plate 9 is a wide side. A mounting steel plate 15 is welded at the bottom of the vertical stiffening plate 13. The lower surface of the mounting steel plate 5 is flush with the bottom end of the semicircular steel plate 9 and is horizontally arranged. Bolt holes 16 are provided on the mounting steel plate 5 to fix the semicircular steel plate 9 to the surface of the limiting bracket 2. The adjusting bolts 8 are passed through the bolt holes 16 and the adjusting bolt slots 7 for fixing. By moving the tightening position of the adjusting bolts 8 on the adjusting bolt slots 7, the gap between the corresponding connecting steel plates 10 on the two semicircular steel plates 9 can be adjusted. Furthermore, as Figure 5 and Figure 7 As shown, a thickness-adjustable square steel 17 is arranged in the gap, and then the connecting steel plate 10 is fixed with the connecting bolt 12 to sandwich the thickness-adjustable square steel 17 in the middle, so as to adjust the distance between the pile body of the prefabricated pipe pile 4 and the adjustable limit clamp 3, and realize the conversion of the two functional states of pile body limit and pile body fixation. Preferably, a notch is provided on the thickness-adjustable square steel 17 for the connecting bolt 12 to pass through.

[0030] Furthermore, a construction process for using the adjustable pile body limiting device to carry out prestressed pipe pile planting is provided: when the previous section of prefabricated pipe pile 4 is sunk to 1 m above the ground elevation of the pile hole or the steel casing elevation, the pile body is first temporarily suspended with a wire rope, and an adjustable pile body limiting clamp 3 is put on the top of the previous section of prestressed prefabricated pipe pile 4, and the clamp is fixed in the adjusting bolt slot hole 7 of the limiting bracket with an adjusting bolt 8, and then the connecting bolts 12 are inserted into the bolt holes of the connecting plates on both sides of the clamp and tightened, so that the pile body is firmly fixed on the limiting bracket 2, and then the next section of prefabricated pipe pile 4 is hoisted to connect with the previous section of prefabricated pipe pile 4. After the first connection of the prefabricated pipe pile 4 is completed, the connection bolts 12 are loosened, and the thickness-adjusting square steel 17 is inserted between the connection steel plates 10 on both sides of the semicircular steel plate 9, and the gap between the prefabricated pipe pile 4 and the adjustable limit clamp 3 is loosened at the same time. The adjustment bolts 8 on the limit bracket 2 are fixed to the position corresponding to the movable bolt slot 7 according to the diameter of the prefabricated pipe pile 4. Under the limiting effect of the adjustable limit clamp 3, the next section of the prefabricated pipe pile 4 is continued to be sunk. When the next section of the prefabricated pipe pile 4 is connected, the connection bolts 12 of the adjustable limit clamp are loosened again, and the thickness-adjusting square steel 17 is taken out and then tightened. The connection construction is carried out after the pile body is fixed. By placing and taking out the thickness-adjusting steel plate 17, the pile body limit and pile body fixation can be easily switched, and the subsequent sections of the prefabricated pipe pile 4 are continued to be sunk until the pile head end plate reaches the designed position. When grouting around the pile body, two grouting pipes are symmetrically tied on both sides of the pile body limit device, so that the anchor slurry flows and rises evenly along the gap between the prefabricated pipe pile 4 and the hole wall. The pile body limit device is removed when grouting reaches a position about 3 to 5m from the hole mouth.

[0031] Furthermore, the size of the through hole of the limiting bracket 2 is determined according to the designed pile diameter, and the side length is 50mm larger than the pile diameter. The limiting device ensures that the center of the prefabricated pipe pile 4 coincides with the center of the hole, and the maximum error should be less than 20mm, ensuring that the gap between the pile body of the prefabricated pipe pile 4 and the surrounding of the hole wall is basically uniform. The time for connecting the piles should be shortened as much as possible to avoid stopping the driving for too long, which will cause the soil around the pile to consolidate and affect the pile sinking.

[0032] Furthermore, the verticality of the pile body must be strictly controlled during the construction process, and the focus should be on the first section of the pile. The pile pipe should be aligned with the pile position, and the pile verticality should be corrected after the pile pipe has entered 0.5m to 1.0m. The deviation must not be greater than 0.5% before the pile can be delivered.

[0033] It will be easily understood by those skilled in the art that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. An adjustable pile body limit device for prestressed pipe pile construction, characterized in that: It comprises a horizontally arranged roadbed box (1), a limiting bracket (2) arranged on the roadbed box (1), and an adjustable limiting clamp (3) fixedly connected to the limiting bracket (2), wherein a through opening is arranged at the center of the limiting bracket (2), a prefabricated pipe pile (4) passes through the through opening and is sunk into a pile hole, and the adjustable limiting clamp (3) is installed on the limiting bracket (2); The adjustable limit clamp (3) comprises two semicircular steel plates (9) joined at the sides, the semicircular steel plates (9) embrace the side walls of the prefabricated pipe pile (4), and a thickness-adjustable square steel (17) is arranged in the gap between the two sides of the semicircular steel plates (9). A movable bolt slot hole (7) is arranged on the limit bracket (2), and the semicircular steel plate (9) is bolted to the limit bracket (2) via the movable bolt slot hole (7).

2. The adjustable pile body limiter for prestressed pipe pile construction according to claim 1, characterized in that: The limit bracket (2) is formed by welding four square steel pipes, which are enclosed to form a square opening, and the lower parts of the four square steel pipes are spot-welded and fixed on the roadbed box (1).

3. The adjustable pile body limit device for prestressed pipe pile planting construction according to claim 2 is characterized in that: The four square steel tubes include two long square steel tubes (5) and two short square steel tubes (6) which are respectively arranged in parallel, and the two short square steel tubes (6) are welded to the inner side of the long square steel tubes (5).

4. The adjustable pile body limit device for prestressed pipe pile construction according to any one of claims 1 to 3, characterized in that: A connecting steel plate (10) is fixedly welded along the radial direction at the side connection of the two semicircular steel plates (9), and the connecting steel plates (10) are respectively fixed by connecting bolts (12) after the two semicircular steel plates (9) are buckled together.

5. The adjustable pile body limit device for prestressed pipe pile planting construction according to claim 4 is characterized in that: A plurality of first stiffening plates (11) are welded to reinforce the connection between the middle of the connecting steel plate (10) and the outer side of the semicircular steel plate (9).

6. The adjustable pile body limit device for prestressed pipe pile planting construction according to claim 4 is characterized in that: A vertical stiffening plate (13) is welded to the middle of the outer arc of the semicircular steel plate (9), a second stiffening plate (14) is welded to the middle of the vertical stiffening plate (13), a mounting steel plate (15) is welded to the bottom of the vertical stiffening plate (13), a bolt hole (16) is provided on the mounting steel plate (15), and the semicircular steel plate (9) is fixed to the surface of the limiting bracket (2) by passing an adjusting bolt (8) through the bolt hole (16) and the adjusting bolt slot hole (7).

7. The adjustable pile body limit device for prestressed pipe pile planting construction according to claim 4 is characterized in that: The thickness-adjusting square steel (17) is provided with a notch, through which the connecting bolt (12) passes.

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