Foundation pit supporting module and foundation pit supporting device thereof

Abstract

The invention relates to the technical field of foundation pit supporting, in particular to a foundation pit supporting module and a foundation pit supporting device thereof, and solves the problems that when a supporting pile and an anchor rod are adopted for combined supporting in the existing foundation pit supporting process, the anchor rod is subjected to radial pressure and is prone to deformation, the pressure of the supporting pile is increased, and the supporting stability is affected. Comprising a plurality of foundation pit supporting modules and a foundation pit construction structure, the foundation pit supporting modules are attached to the inner wall of a foundation pit and surround the inner wall of the foundation pit to form an overlook closed curve shape, and after surrounding supporting is completed, a circle of crown beams are poured at the top ends of supporting piles of all the foundation pit supporting modules; the foundation pit construction structure is composed of a foundation pit bottom soil layer, a foundation pit bottom hardened layer, a supporting rock-soil layer and a foundation pit edge hardened layer. The supporting piles and the anchor rods are subjected to combined supporting, the anchor rods are subjected to grouting supporting, the strength of the anchor rods during supporting is effectively kept, and then the foundation pit supporting effect is improved.

Description

Technical Field

[0001] This invention relates to the field of foundation pit support technology, specifically to a foundation pit support module and a foundation pit support device. Background Technology

[0002] The foundation pit support structure and foundation pit support components are a general term for the components or other measures taken to support, strengthen or cover the surrounding rock after the underground chamber is excavated to ensure stability and construction safety. Their main functions include ensuring the safety and stability of the foundation, preventing soil seepage and landslides, and ensuring the safety of the soil and personnel.

[0003] In existing foundation pit support processes, when using a combination of support piles and anchor rods, the anchor rods are subjected to radial pressure, which can easily lead to deformation, increasing the pressure on the support piles and affecting the stability of the support. Therefore, this method does not meet the current requirements. To address this, we propose a foundation pit support module and its supporting device. Summary of the Invention

[0004] The purpose of this invention is to provide a foundation pit support module and a foundation pit support device to solve the problem mentioned in the background art that when the existing foundation pit support process uses a combination of support piles and anchor rods for support, the anchor rods are subjected to radial pressure, which easily leads to deformation, resulting in increased pressure on the support piles and affecting the stability of the support.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a foundation pit support module, comprising an isolation support structure, wherein two horizontal connecting units are vertically distributed below the isolation support structure, and multiple oblique anchoring units are horizontally distributed through each horizontal connecting unit; the isolation support structure includes a capping beam, and multiple support piles are fixedly installed on the lower end face of the capping beam; a concrete support block is filled between each two adjacent support piles; two grouting pipes are inserted into the concrete support block from top to bottom, and the number of grouting pipes is the same as the number of oblique anchoring units.

[0006] Preferably, the horizontal connecting unit includes a support angle plate, with locking rods installed at both ends of the support angle plate, a triangular pad fixedly installed on the upper end surface of the support angle plate, and an I-beam installed on one side of the triangular pad.

[0007] Preferably, the inclined anchoring unit includes an anchor rod, a limiting sleeve is installed on the outer side of the upper end of the anchor rod, a sealing cap is installed on the upper end of the limiting sleeve, and a polygonal positioning head is installed between the sealing cap and the anchor rod.

[0008] Preferably, the multiple support piles and concrete support blocks are arranged alternately, and the capping beam and the multiple concrete support blocks are all provided with steel mesh. The capping beam, the multiple concrete support blocks and the grouting pipe are all integrally cast with concrete, and the grouting pipe is inserted into the inside of the anchoring hole.

[0009] Preferably, the soil layer at the bottom of the foundation pit and the supporting rock and soil layer are separated by multiple support piles and concrete support blocks. One end of the locking rod passes through the support corner plate and the concrete support block and is inserted into the inner side of the supporting rock and soil layer. Both ends of the support corner plate are fixedly connected to two of the concrete support blocks by the locking rod.

[0010] Preferably, the triangular pad is in close contact with the surface of the multiple support piles, the I-beam and the supporting angle plate are fixedly connected by the triangular pad, and the two I-beams, the triangular pad and the supporting angle plate are arranged linearly along the axis of the support pile.

[0011] Preferably, the plurality of anchor rods are arranged linearly along the axis of the I-beam, and the bottom end of the anchor rod passes through the limiting sleeve, the triangular pad, the concrete support block and the grouting pipe in sequence and is inserted into the inner side of the anchoring hole. The anchor rod is fixedly connected to the supporting rock and soil layer through the grouting pipe, and the anchor rod and the grouting pipe are coaxial.

[0012] Preferably, the limiting sleeve is fixedly connected to the I-beam, the upper end of the anchor rod is in close contact with the middle of the sealing cap, the polygonal positioning head is fixedly connected to the I-beam through the sealing cap, the cross-section of the polygonal positioning head is polygonal, and the bottom end of the polygonal positioning head is inserted into the inner side of the upper end of the anchor rod.

[0013] Preferably, the axis of the anchor rod is perpendicular to the side of the I-beam, and the angle between the side of the I-beam and the axis of the support pile is the installation angle of the anchor rod.

[0014] A foundation pit support device includes multiple foundation pit support modules and a foundation pit construction structure. The multiple foundation pit support modules are attached to the inner wall of the foundation pit and surround the inner wall of the foundation pit in a top-view closed curve shape. After the surrounding support is completed, a crown beam is poured at the top of the support piles of all foundation pit support modules. The foundation pit construction structure consists of a soil layer at the bottom of the foundation pit, a hardened layer at the bottom of the foundation pit, a supporting soil and rock layer, and a hardened layer at the edge of the foundation pit. The hardened layer at the edge of the foundation pit is fixedly installed on the upper surface of the supporting soil and rock layer. The foundation pit is located inside the supporting soil and rock layer. The hardened layer at the bottom of the foundation pit is installed at the bottom of the foundation pit. The soil layer at the bottom of the foundation pit is fixedly installed on the lower surface of the hardened layer at the bottom of the foundation pit. The inner wall of the supporting soil and rock layer is provided with multiple anchoring holes.

[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention separates the bottom edge of the foundation pit into the bottom soil layer and the supporting soil layer. Then, a steel mesh is laid on the upper end of multiple support piles and between each pair of adjacent support piles. The two ends of two support corner plates are installed on one side of multiple support piles through locking rods. Then, the support corner plates are fixed to the I-beams through triangular pads. The bottom end of the anchor rod passes through the I-beam, the limiting sleeve, and the triangular pad in sequence and is inserted into the inner side of the anchor hole. The angle between the side of the I-beam and the axis of the support pile is the installation angle of the anchor rod. Then, the steel mesh and the anchor rod and the supporting soil layer are poured simultaneously. 2. This invention improves the support strength of the isolation support structure for the edge of the foundation pit by integrating the crown beam, multiple concrete support blocks and grouting pipes into a single casting. At the same time, the anchor rods can effectively maintain the stability of the anchoring of the supporting soil and rock layer through the grouting pipes, reducing the radial pressure of the supporting soil and rock layer on the anchor rods. The upper end of the anchor rods is covered by the sealing cap and fixed connection with the I-beam. The polygonal positioning head has a polygonal cross-section, which facilitates the positioning of the anchor rods and avoids axial deflection of the anchor rods. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a side view of the entire invention; Figure 3 This is a schematic cross-sectional view of the overall structure of the present invention; Figure 4 This is an exploded structural diagram of the foundation pit unit of the present invention; Figure 5 This is a cross-sectional structural diagram of the isolation support structure of the present invention; Figure 6 This is a rear view of the isolation support structure of the present invention; Figure 7 This is a schematic diagram of the structure of the horizontal connection unit of the present invention; Figure 8 For the present invention Figure 3 A magnified structural diagram of region A in the middle.

[0017] In the diagram: 1. Excavation pit construction structure; 101. Soil layer at the bottom of the excavation pit; 102. Hardened layer at the bottom of the excavation pit; 103. Supporting soil and rock layer; 104. Hardened layer at the edge of the excavation pit; 105. Anchor hole; 2. Isolation support structure; 201. Crown beam; 202. Support pile; 203. Concrete support block; 204. Grouting pipe; 3. Horizontal connection unit; 301. I-beam; 302. Triangular pad; 303. Support angle plate; 304. Locking rod; 4. Diagonal anchoring unit; 401. Anchor rod; 402. Sealing gland; 403. Polygonal positioning head; 404. Limiting sleeve. Detailed Implementation

[0018] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0019] Please see Figures 1 to 4 An embodiment of the present invention provides: a foundation pit support device, including foundation pit support modules and foundation pit construction structure, wherein multiple foundation pit support modules are attached to the inner wall of the foundation pit and surround the inner wall of the foundation pit in a top view closed curve shape. After the surrounding support is completed, a ring of cap beam 201 is poured at the top of the support piles 202 of all foundation pit support modules. The foundation pit construction structure 1 consists of a soil layer 101 at the bottom of the foundation pit, a hardened layer 102 at the bottom of the foundation pit, a supporting soil and rock layer 103, and a hardened layer 104 at the edge of the foundation pit. The hardened layer 104 at the edge of the foundation pit is fixedly installed on the upper end face of the supporting soil and rock layer 103. The foundation pit is located inside the supporting soil and rock layer 103. The hardened layer 102 at the bottom of the foundation pit is installed at the bottom end of the foundation pit. The soil layer 101 at the bottom of the foundation pit is fixedly installed on the lower end face of the hardened layer 102. The inner wall of the supporting soil and rock layer 103 is provided with multiple anchoring holes 105, which facilitate the positioning of the inclined anchoring unit 4.

[0020] Please see Figures 2 to 6 The foundation pit support module includes an isolation support structure 2. Below the isolation support structure 2, two horizontal connecting units 3 are vertically distributed. Each horizontal connecting unit 3 has multiple oblique anchoring units 4 distributed horizontally. The isolation support structure 2 includes multiple support piles 202. A concrete support block 203 is filled between each pair of adjacent support piles 202. The multiple support piles 202 and concrete support blocks 203 are arranged alternately. The soil layer 101 at the bottom of the foundation pit and the supporting soil and rock layer 103 are connected by the multiple support piles 202 and concrete support blocks. The concrete support block 203 is divided into sections. Two grouting pipes 204 are inserted into the concrete support block 203 from top to bottom. The cap beam 201 and multiple concrete support blocks 203 are all equipped with steel mesh. The cap beam 201, multiple concrete support blocks 203 and grouting pipes 204 are all integrally cast with concrete. The grouting pipes 204 are inserted into the inner side of the anchoring hole 105. The anchor rod 401 can effectively maintain the stability of the anchoring of the supporting soil layer 103 through the grouting pipes 204, and reduce the radial pressure of the supporting soil layer 103 on the anchor rod 401.

[0021] Please see Figures 2 to 8The aforementioned horizontal connecting unit 3 includes a support angle plate 303. Both ends of the support angle plate 303 are equipped with locking rods 304. One end of the locking rod 304 passes through the support angle plate 303 and the concrete support block 203 and is inserted into the inner side of the supporting soil layer 103. Both ends of the support angle plate 303 are fixedly connected to two of the concrete support blocks 203 via the locking rods 304. A triangular pad 302 is fixedly installed on the upper surface of the support angle plate 303. 02 is in close contact with the surface of multiple support piles 202. An I-beam 301 is installed on one side of the triangular pad 302. The I-beam 301 and the support angle plate 303 are fixedly connected by the triangular pad 302. The two I-beams 301, the triangular pad 302 and the support angle plate 303 are arranged linearly along the axis of the support pile 202. The horizontal connection unit 3 can synchronously support multiple inclined anchoring units 4 and keep multiple inclined anchoring units 4 on the same horizontal line.

[0022] Please see Figure 3 and Figure 8 The number of grouting pipes 204 is the same as the number of inclined anchoring units 4. Each inclined anchoring unit 4 includes anchor rods 401. Multiple anchor rods 401 are arranged linearly along the axis of the I-beam 301. The anchor rods 401 are fixedly connected to the supporting soil layer 103 via grouting pipes 204. A limiting sleeve 404 is installed on the outer side of the upper end of the anchor rod 401. The limiting sleeve 404 is fixedly connected to the I-beam 301. A sealing cap 402 is installed at the upper end of the limiting sleeve 404. The upper end of the anchor rod 401... The sealing cap 402 is in close contact with the middle part of the sealing cap 402. A polygonal positioning head 403 is installed between the sealing cap 402 and the anchor rod 401. The polygonal positioning head 403 is fixedly connected to the I-beam 301 through the sealing cap 402. The polygonal positioning head 403 has a polygonal cross section. The bottom end of the polygonal positioning head 403 is inserted into the inner side of the upper end of the anchor rod 401. The polygonal positioning head 403 facilitates the positioning of the anchor rod 401 and prevents the anchor rod 401 from axially deflecting.

[0023] Please see Figures 1 to 8 The axis of the anchor rod 401 is perpendicular to the side of the I-beam 301. The angle between the side of the I-beam 301 and the axis of the support pile 202 is the installation angle of the anchor rod 401. The bottom end of the anchor rod 401 passes through the limiting sleeve 404, the triangular pad 302, the concrete support block 203 and the grouting pipe 204 in sequence and is inserted into the inner side of the anchoring hole 105. The anchor rod 401 and the grouting pipe 204 are coaxial. The anchor rod 401 can effectively maintain the stability of the anchoring of the support soil layer 103 through the grouting pipe 204.

[0024] In summary, during the foundation pit support, multiple support piles 202 are arranged linearly and inserted into the inner wall of the foundation pit, thereby separating the bottom edge of the foundation pit, the bottom soil layer 101, and the supporting soil layer 103. Then, steel mesh is laid at the upper end of the multiple support piles 202 and between each adjacent pair of support piles 202. Both ends of the two support corner plates 303 are installed on one side of the multiple support piles 202 through locking rods 304. Then, the support corner plates 303 are fixed to the I-beams 301 through the triangular pads 302. At this time, multiple inclined anchoring units 4 are installed. Specifically, the bottom end of the anchor rod 401 passes through the I-beam 301, the limiting sleeve 404, and the triangular pad 302 in sequence and is inserted into the inner side of the anchoring hole 105. The angle between the side of the I-beam 301 and the axis of the support pile 202 is the installation angle of the anchor rod 401. Then, the steel mesh and the anchor rod 401 and the support soil layer 103 are poured synchronously, which makes it easier to keep the cap beam 201, multiple concrete support blocks 203 and grouting pipe 204 as a whole and improve the support strength of the isolation support structure 2 for the edge of the foundation pit. Meanwhile, the anchor bolt 401 can effectively maintain the stability of the anchoring of the supporting soil and rock layer 103 through the grouting pipe 204, reduce the radial pressure of the supporting soil and rock layer 103 on the anchor bolt 401, and cover the upper end of the anchor bolt 401 by fixing the sealing cap 402 to the I-beam 301. The polygonal positioning head 403 has a polygonal cross section, which facilitates the positioning of the anchor bolt 401 and avoids axial deflection of the anchor bolt 401.

[0025] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A foundation pit support module, comprising an isolation support structure (2), wherein two horizontal connecting units (3) are vertically distributed below the isolation support structure (2), and each horizontal connecting unit (3) has multiple oblique anchoring units (4) distributed horizontally through it, characterized in that: The isolation support structure (2) includes multiple support piles (202), and each pair of adjacent support piles (202) is filled with concrete support blocks (203). Each concrete support block (203) has two grouting pipes (204) inserted from top to bottom. The number of grouting pipes (204) is the same as that of the inclined anchoring unit (4).

2. The foundation pit support module according to claim 1, characterized in that: The horizontal connecting unit (3) includes a support angle plate (303), and locking rods (304) are installed at both ends of the support angle plate (303). A triangular pad (302) is fixedly installed on the upper surface of the support angle plate (303), and an I-beam (301) is installed on one side of the triangular pad (302).

3. The foundation pit support module according to claim 2, characterized in that: The inclined anchoring unit (4) includes an anchor rod (401), a limiting sleeve (404) is installed on the outer side of the upper end of the anchor rod (401), a sealing cap (402) is installed on the upper end of the limiting sleeve (404), and a polygonal positioning head (403) is installed between the sealing cap (402) and the anchor rod (401).

4. The foundation pit support module according to claim 3, characterized in that: Multiple support piles (202) and concrete support blocks (203) are arranged alternately. The cap beam (201) and multiple concrete support blocks (203) are all equipped with steel mesh. The cap beam (201), multiple concrete support blocks (203) and grouting pipe (204) are all integrally cast with concrete. The grouting pipe (204) is inserted into the inside of the anchor hole (105).

5. A foundation pit support module according to claim 4, characterized in that: The bottom soil layer (101) of the foundation pit and the supporting soil layer (103) are separated by multiple supporting piles (202) and concrete support blocks (203). One end of the locking rod (304) passes through the supporting corner plate (303) and the concrete support block (203) and is inserted into the inner side of the supporting soil layer (103). Both ends of the supporting corner plate (303) are fixedly connected to two of the concrete support blocks (203) by the locking rod (304).

6. A foundation pit support module according to claim 5, characterized in that: The triangular pad (302) is in contact with the surface of multiple support piles (202), and the I-beam (301) and the support angle plate (303) are fixedly connected by the triangular pad (302). The two I-beams (301), the triangular pad (302) and the support angle plate (303) are arranged linearly along the axis of the support pile (202).

7. A foundation pit support module according to claim 6, characterized in that: Multiple anchor rods (401) are arranged linearly along the axis of the I-beam (301). The bottom end of the anchor rod (401) passes through the limiting sleeve (404), the triangular pad (302), the concrete support block (203) and the grouting pipe (204) in sequence and is inserted into the inner side of the anchor hole (105). The anchor rod (401) is fixedly connected to the supporting soil layer (103) through the grouting pipe (204). The anchor rod (401) and the grouting pipe (204) are coaxial.

8. A foundation pit support module according to claim 7, characterized in that: The limiting sleeve (404) is fixedly connected to the I-beam (301), the upper end of the anchor rod (401) is in contact with the middle of the sealing cap (402), the polygonal positioning head (403) is fixedly connected to the I-beam (301) through the sealing cap (402), the cross section of the polygonal positioning head (403) is polygonal, and the bottom end of the polygonal positioning head (403) is inserted into the inner side of the upper end of the anchor rod (401).

9. A foundation pit support module according to claim 8, characterized in that: The axis of the anchor rod (401) is perpendicular to the side of the I-beam (301), and the angle between the side of the I-beam (301) and the axis of the support pile (202) is the installation angle of the anchor rod (401).

10. A foundation pit support device, comprising a foundation pit construction structure (1) and a plurality of foundation pit support modules as described in claim 9, characterized in that: Multiple foundation pit support modules are attached to the inner wall of the foundation pit and surround the inner wall of the foundation pit in a top view closed curve. After the surrounding support is completed, a ring of cap beam (201) is poured on the top of the support piles (202) of all foundation pit support modules. The foundation pit construction structure (1) consists of a soil layer (101) at the bottom of the foundation pit, a hardened layer (102) at the bottom of the foundation pit, a supporting soil layer (103) and a hardened layer (104) at the edge of the foundation pit. The hardened layer (104) at the edge of the foundation pit is fixedly installed on the upper end face of the supporting soil layer (103). The foundation pit is located inside the supporting soil layer (103). The hardened layer (102) at the bottom of the foundation pit is installed at the bottom end of the foundation pit. The soil layer (101) at the bottom of the foundation pit is fixedly installed on the lower end face of the hardened layer (102). The inner wall of the supporting soil layer (103) is provided with multiple anchoring holes (105).

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