Deep foundation pit cast-in-place pile supporting structure

Abstract

The utility model relates to the technical field of cast-in-place pile construction, and discloses a deep foundation pit cast-in-place pile supporting structure which comprises a pull rod installed on the inner wall of a deep foundation pit, an anchor pile inserted into a foundation of the deep foundation pit and a supporting assembly used for supporting the cast-in-place pile, a butt-joint hole is formed in the anchor pile, one end of the pull rod is connected with the inner wall of the butt-joint hole, and the other end of the pull rod is connected with the inner wall of the butt-joint hole. The other end of the pull rod is connected with the inner wall of the supporting assembly. A rotatable long rod is arranged in the pull rod, a plurality of arc-shaped blocks are installed on the two sides of the long rod in the axial direction at intervals, and the angle difference between every two adjacent arc-shaped blocks is 180 degrees. According to the deep foundation pit cast-in-place pile supporting structure, by arranging the anchor piles, the pull rods and the supporting assemblies, the cast-in-place piles and the land around the deep foundation pit can be firmly combined, the situation that the cast-in-place piles are fractured due to the fact that the cast-in-place piles are subjected to too large soil pressure in the using process in the deep foundation pit is prevented, and the stability and reliability of the cast-in-place piles are improved; and the supporting structure does not occupy the pit bottom space of the deep foundation pit, and foundation pit constructors and machines can conduct construction at the pit bottom conveniently.

Description

Technical Field

[0001] This utility model relates to the field of cast-in-place pile construction technology, specifically a deep foundation pit cast-in-place pile support structure. Background Technology

[0002] Cast-in-place piles are a type of in-situ drilling structure. They are typically formed by drilling or excavating holes in the foundation soil layer to create a cavity, then filling the cavity with concrete or reinforced concrete, and finally forming a pile after the concrete has solidified. They are a type of deep foundation pit support structure, possessing advantages such as simple construction, high bearing capacity, and strong adaptability, and are widely used in various engineering projects. Cast-in-place piles can be classified according to their drilling methods into drilled cast-in-place piles, driven cast-in-place piles, manually excavated cast-in-place piles, and expanded cast-in-place piles, among others.

[0003] When using cast-in-place piles for support, the gaps between the piles must be waterproofed to prevent collapse. The upper part also needs to be supported by a retaining frame device to prevent tilting. Currently, the common method is to use retaining frames in conjunction with overlapping adjustable diagonal braces for support. However, placing the overlapping adjustable support components between two opposite cap beams will reduce the opening of the deep foundation pit, making it difficult for building materials, personnel, and equipment to enter and exit normally. Utility Model Content

[0004] In view of the shortcomings of the existing technology, this utility model provides a deep foundation pit cast-in-place pile support structure, which solves the problems mentioned in the background.

[0005] This utility model provides the following technical solution: a deep foundation pit cast-in-place pile support structure, comprising: a tie rod installed to the inner wall of the deep foundation pit, an anchor pile inserted into the foundation of the deep foundation pit, and a support assembly for supporting the cast-in-place pile, wherein the anchor pile is provided with a docking hole, one end of the tie rod is connected to the inner wall of the docking hole, and the other end of the tie rod is connected to the inner wall of the support assembly;

[0006] The pull rod has a rotatable long rod inside. Multiple arc-shaped blocks are installed on both sides of the long rod at axial intervals. The angle difference between two adjacent arc-shaped blocks is 180°. Insertion holes are opened on the surface of the pull rod corresponding to the positions of the arc-shaped blocks. Insertion rod bodies are connected to the inner wall of the insertion holes.

[0007] Preferably, the support assembly includes a reinforcing plate and a fixing nut. The surface of the reinforcing plate has a through hole, and one end of the tie rod is provided with a threaded section. One end of the threaded section passes through the through hole and is threadedly connected to the inner wall of the fixing nut.

[0008] Preferably, the reinforcing plate has a clamping block on the side near the cast-in-place pile that matches the curved surface of the outer wall of the cast-in-place pile.

[0009] Preferably, the pull rod has two end plates symmetrically arranged inside. The surfaces of the two end plates are welded to the inner wall of the pull rod. Each of the two end plates has a mounting hole at its center. A ball bearing is embedded in the mounting hole, and the surface of the long rod is connected to the inner wall of the ball bearing.

[0010] Preferably, the multiple insert rod bodies on both sides of the pull rod are staggered.

[0011] Preferably, a knob is installed at one end of the long rod, and a groove is formed on the surface of the knob.

[0012] Preferably, the mating hole is a tapered hole, and the diameter of the tapered hole gradually decreases along the insertion direction of the pull rod.

[0013] Preferably, the tie rod is inserted laterally into the side wall of the deep foundation pit, the anchor pile is set perpendicular to the tie rod, and the bottom end of the anchor pile is inserted into the foundation of the deep foundation pit, while the top end of the anchor pile extends to the outside of the foundation of the deep foundation pit and is connected to a pile head.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. This deep foundation pit cast-in-place pile support structure, by setting anchor piles, tie rods and support components, can firmly connect the cast-in-place piles to the soil around the deep foundation pit, preventing the cast-in-place piles from breaking due to excessive soil pressure during use in the deep foundation pit, thus improving the stability and reliability of the cast-in-place piles. In addition, this support structure does not occupy the bottom space of the deep foundation pit, which facilitates the construction of foundation pit personnel and machinery at the bottom of the pit.

[0016] 2. This deep foundation pit cast-in-place pile support structure, by setting up a long rod, an arc-shaped block, a rod insertion hole and a rod body, can rotate the long rod to drive the arc-shaped block to rotate inside the tie rod. During the rotation of the arc-shaped block, it will squeeze the outer rod, so that the rod can be inserted into the soil around the tie rod through the through hole. This can increase the contact area between the tie rod and the soil, improve the pull-out resistance of the tie rod, and thus improve the support effect of the tie rod on the cast-in-place pile. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the orthographic section of the present invention;

[0018] Figure 2 This is a schematic diagram of the cross-sectional structure of the tie rod of this utility model;

[0019] Figure 3 This is a schematic diagram of the distribution structure of the arc-shaped block and the insert body of this utility model;

[0020] Figure 4 This is a top view of the structure of this utility model;

[0021] Figure 5This is a schematic diagram of the structure at the knob position of this utility model;

[0022] Figure 6 This utility model Figure 1 Enlarged structural diagram at position A.

[0023] In the diagram: 1. Deep foundation pit; 2. Foundation; 3. Cast-in-place pile; 4. Tie rod; 5. Anchor pile; 6. Support assembly; 61. Reinforcing plate; 62. Fixing nut; 63. Clamping block; 7. Connecting hole; 8. Long rod; 9. Arc-shaped block; 10. Insertion hole; 11. Insertion body; 12. End plate; 13. Mounting hole; 14. Ball bearing; 15. Knob; 16. Slotted groove; 17. Pile head. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Please see Figure 1-6 A deep foundation pit cast-in-place pile support structure includes: a tie rod 4 installed to the inner wall of the deep foundation pit 1, an anchor pile 5 inserted into the foundation 2 of the deep foundation pit 1, and a support component 6 for supporting the cast-in-place pile 3. The anchor pile 5 is provided with a docking hole 7, which is a conical hole. The diameter of the conical hole gradually decreases along the insertion direction of the tie rod 4. One end of the tie rod 4 is connected to the inner wall of the docking hole 7, and the other end of the tie rod 4 is connected to the inner wall of the support component 6.

[0026] The pull rod 4 has a rotatable long rod 8 inside. Multiple arc-shaped blocks 9 are installed on both sides of the long rod 8 at intervals along the axial direction. The angle difference between two adjacent arc-shaped blocks 9 is 180°. The surface of the pull rod 4 is provided with a rod insertion hole 10 corresponding to the position of the arc-shaped block 9. The inner wall of the rod insertion hole 10 is connected to the rod body 11.

[0027] The support assembly 6 includes a reinforcing plate 61 and a fixing nut 62. The surface of the reinforcing plate 61 has a through hole. One end of the tie rod 4 is provided with a threaded section. One end of the threaded section passes through the through hole and is threadedly connected to the inner wall of the fixing nut 62. The side of the reinforcing plate 61 near the grouting pile 3 is provided with a clamping block 63 that matches the outer curved surface of the grouting pile 3. Two end plates 12 are symmetrically arranged inside the tie rod 4. The surfaces of the two end plates 12 are welded to the inner wall of the tie rod 4. The center of the surface of each end plate 12 is provided with a mounting hole 13. A ball bearing 14 is embedded in the mounting hole 13, and the surface of the long rod 8 is connected to the inner wall of the ball bearing 14.

[0028] The multiple insert rod bodies 11 on both sides of the pull rod 4 are staggered.

[0029] In one specific embodiment, a knob 15 is installed at one end of the long rod 8. A slot 16 is formed on the surface of the knob 15. The slot 16 can be connected to a flathead wrench to rotate the long rod 7.

[0030] Tie rod 4 is inserted laterally into the side wall of deep foundation pit 1. Anchor pile 5 is set perpendicular to tie rod 4, and the bottom end of anchor pile 5 is inserted into the foundation 2 of deep foundation pit 1. The top end of anchor pile 5 extends to the outside of foundation 2 of deep foundation pit 1 and is connected to pile head 17.

[0031] In use, first, draw an outer line 3m away from the edge of the deep foundation pit 1. Then, vertically insert the anchor pile 5 onto the outer line, ensuring that the anchor pile 5 is directly opposite the center of two adjacent cast-in-place piles 3. Next, fully insert the anchor pile 5 into the soil. Then, insert the tie rod 4 horizontally one by one into the soil on the side wall of the foundation pit between the two cast-in-place piles 3. The vertical distance between the center of the tie rod 4's cross-section and the upper edge of the foundation pit is equal to the distance from the top of the anchor pile 5 to the center of the connecting hole 7. As the tie rod is continuously inserted, it will pass through the connecting and penetrating anchor pile 5, at which point the insertion of the tie rod 4 can be stopped. When the tie rod 4 is fully inserted, at least one set of the tie rod body 11 should be located on the side of the anchor pile 5 away from the cast-in-place pile 3. Then, install the reinforcing plate 61 on the tie rod 4 and install the fixing nut 62 onto the threaded section of the tie rod 4. The fixed nut 62 will push the reinforcing plate 61 to move, and the reinforcing plate 61 will push the clamping block 63 to move. The clamping block 63 will press the cast-in-place pile 3. At this time, the knob 15 at the end of the tie rod 4 will be rotated. The knob 15 will drive the arc block 9 inside the tie rod 4 to rotate. During the rotation of the arc block 9, it will squeeze the insert rod body 11 outward, so that the insert rod body 11 passes through the insert rod hole 10 and is inserted into the soil, thereby improving the pull-out resistance of the tie rod 4. When the soil pressure received by the cast-in-place pile 3 is too large and it gradually tilts, the pull-out force on the tie rod 4 will inevitably gradually increase. When it increases to the bearing limit of the tie rod 4, the tie rod 4 will gradually be pulled out of the soil. At this time, the anchor pile 5 will cooperate with the insert rod to block the tie rod 4 from being pulled out, thereby preventing the cast-in-place pile 3 from continuing to tilt and avoiding damage to personnel or equipment in the foundation pit caused by the collapse of the cast-in-place pile 3.

[0032] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A deep foundation pit cast-in-place pile support structure, characterized in that, include: Tie rods (4) installed on the inner wall of the deep foundation pit (1), anchor piles (5) inserted into the foundation (2) of the deep foundation pit (1), and support components (6) for supporting the cast-in-place piles (3). The anchor piles (5) are provided with docking holes (7). One end of the tie rod (4) is connected to the inner wall of the docking hole (7), and the other end of the tie rod (4) is connected to the inner wall of the support components (6). The pull rod (4) has a rotatable long rod (8) inside. Multiple arc-shaped blocks (9) are installed on both sides of the long rod (8) along the axial direction. The angle difference between two adjacent arc-shaped blocks (9) is 180°. The surface of the pull rod (4) is provided with a rod insertion hole (10) corresponding to the position of the arc-shaped block (9). The inner wall of the rod insertion hole (10) is connected to the rod body (11).

2. The deep foundation pit cast-in-place pile support structure according to claim 1, characterized in that, The support assembly (6) includes a reinforcing plate (61) and a fixing nut (62). The surface of the reinforcing plate (61) is provided with a through hole. One end of the pull rod (4) is provided with a threaded section. One end of the threaded section passes through the through hole and is threadedly connected to the inner wall of the fixing nut (62).

3. The deep foundation pit cast-in-place pile support structure according to claim 2, characterized in that, The reinforcing plate (61) is provided with a clamping block (63) on the side near the cast-in-place pile (3) that matches the outer wall curved surface of the cast-in-place pile (3).

4. The deep foundation pit cast-in-place pile support structure according to claim 1, characterized in that, The pull rod (4) has two end plates (12) symmetrically arranged inside. The surfaces of the two end plates (12) are welded to the inner wall of the pull rod (4). The center of the surfaces of the two end plates (12) is provided with mounting holes (13). The mounting holes (13) are embedded with ball bearings (14), and the surface of the long rod (8) is connected to the inner wall of the ball bearings (14).

5. The deep foundation pit cast-in-place pile support structure according to claim 1, characterized in that, The multiple insert bodies (11) on both sides of the pull rod (4) are staggered.

6. The deep foundation pit cast-in-place pile support structure according to claim 1, characterized in that, A knob (15) is installed at one end of the long rod (8), and a groove (16) is formed on the surface of the knob (15).

7. The deep foundation pit cast-in-place pile support structure according to claim 1, characterized in that, The docking hole (7) is a tapered hole, and the diameter of the tapered hole gradually decreases along the insertion direction of the pull rod (4).

8. The deep foundation pit cast-in-place pile support structure according to claim 1, characterized in that, The tie rod (4) is inserted laterally into the side wall of the deep foundation pit (1). The anchor pile (5) is set perpendicular to the tie rod (4), and the bottom end of the anchor pile (5) is inserted into the foundation (2) of the deep foundation pit (1). The top end of the anchor pile (5) extends to the outside of the foundation (2) of the deep foundation pit (1) and is connected to a pile head (17).

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