Earthwork foundation pit supporting structure

Abstract

The utility model belongs to the technical field of constructional engineering, and particularly relates to an earthwork foundation pit supporting structure which comprises a supporting anchor rod, the outer wall of the supporting anchor rod is connected with a supporting anchor pipe in a sliding mode, and one end of the supporting anchor rod is rotatably connected with soil hooking plates in an array mode. Penetrating grooves allowing the soil hooking plates to penetrate through are formed in one end of the supporting anchor pipe in an array mode, and a net bag is fixedly connected between the soil hooking plates and located on the outer side of the supporting anchor pipe; the soil hooking plate and the net bag can be controlled to be folded or expanded through sliding of the supporting anchor rod, when the soil hooking plate and the net bag are folded, the supporting anchor rod and the supporting anchor pipe can be conveniently embedded into a side slope anchor hole, and when the soil hooking plate and the net bag are expanded, loose soil sludge in the anchor hole can be pushed out. Therefore, the situation that loose soil destroys the bonding force between the grout and the supporting anchor rod and the supporting anchor pipe is avoided, grouting is more uniform, and the pulling resistance and stability are improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of building engineering, concretely relates to a earthwork foundation pit support structure. BACKGROUND

[0002] The earthwork foundation pit is the earth pit that is excavated according to the foundation design position, base elevation and foundation plane size, and its purpose is to provide a stable foundation support surface for building or structure, to ensure the safety and stability of the upper structure, and the soil nailing wall as a kind of in-situ soil body reinforcing technology has wide application in the support and reinforcement of earthwork foundation pit, after the drilling of foundation pit slope, support anchor rod is embedded into hole, then grouting is injected into hole and waits for solidification, grouting is the key step in the construction of soil nailing wall, and its purpose is to fill the gap between support anchor rod and surrounding soil, to improve the adhesion between anchor rod and soil and overall stability.

[0003] In the prior art, after the drilling of foundation pit slope, there are residual mud and loose soil in the hole, which will interfere with the grouting process, hinder the flow of slurry, cause insufficient grouting, and thus affect the interface adhesion between support anchor rod and soil, and reduce the pullout resistance and stability of support anchor rod. CONTENT OF THE UTILITY MODEL

[0004] The utility model aims at providing a kind of earthwork foundation pit support structure, the sliding of support anchor rod can control hooking soil plate, net bag folding or expansion, when hooking soil plate, net bag folding, support anchor rod and support anchor pipe can be conveniently embedded into slope anchor hole, when hooking soil plate, net bag expansion, the loose soil in anchor hole can be pushed out, to avoid loose soil to destroy the adhesion of slurry and support anchor rod, support anchor pipe, make grouting more uniform, improve its pullout resistance and stability.

[0005] The technical scheme adopted by the utility model is as follows:

[0006] A kind of earthwork foundation pit support structure, including support anchor rod, the outer wall of the support anchor rod is slidably connected with support anchor pipe, one end of the support anchor rod is rotatably connected with hooking soil plate in array, one end of the support anchor pipe is arrayed with slot for the hooking soil plate to pass through, a plurality of hooking soil plates are fixedly connected with net bag between the hooking soil plate and the outer side of the support anchor pipe, the outer wall of the support anchor pipe is arrayed with embedding slot for the hooking soil plate to be embedded, the top of the embedding slot is fixedly connected with slope plate, one end of the support anchor pipe and below the hooking soil plate is fixedly connected with tail ring.

[0007] The top of the tail ring and the middle part of the slot are fixedly connected with wedge-shaped plate.

[0008] The tail ring is arranged as cylindrical with hollow middle part, and the one end of the support anchor pipe is fixedly connected with spiral pipe.

[0009] The support anchor rod is rotatably connected with a screw cap at one end of the outer wall away from the soil hooking plate.

[0010] The screw cap is threadedly connected with the screw pipe.

[0011] The technical effects achieved by the utility model are as follows: the sliding of the support anchor rod can control the folding or expansion of the soil hooking plate and the mesh bag, the support anchor rod and the support anchor pipe can be conveniently embedded into the slope anchor hole when the soil hooking plate and the mesh bag are folded, and the virtual soil and sludge in the anchor hole can be pushed out when the soil hooking plate and the mesh bag are expanded, so that the adhesion between the grout and the support anchor rod and the support anchor pipe is avoided to be damaged by the virtual soil, the grouting is more uniform, and the pullout resistance and stability are improved. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 is an overall appearance view of the earthwork foundation pit support structure provided by the embodiment of the utility model;

[0013] Figure 2 is Figure 1 is an enlarged view of part A in figure 1;

[0014] Figure 3 is Figure 1 is an enlarged view of part B in figure 1.

[0015] In the drawings, the components represented by each reference numeral are listed as follows:

[0016] 1, support anchor rod; 101, support anchor pipe; 102, screw cap; 103, screw pipe; 104, embedding groove; 105, slope plate; 106, soil hooking plate; 107, mesh bag; 108, tail ring; 109, wedge-shaped plate; 110, through groove. DETAILED DESCRIPTION

[0017] In order to make the purpose and advantages of the utility model more clear and explicit, the utility model is specifically described below in combination with embodiments. It should be understood that the following text is only used to describe one or several specific embodiments of the utility model, and does not strictly limit the protection scope of the utility model.

[0018] As Figures 1-3As shown, a kind of earthwork foundation pit support structure, including support anchor rod 1, the outer wall of support anchor rod 1 is slidably connected with support anchor pipe 101, the one end of support anchor rod 1 is arrayedly rotatably connected with soil hooking plate 106, the one end of support anchor pipe 101 is arrayedly provided with through slot 110 for soil hooking plate 106 to pass through, the net bag 107 is fixedly connected between several soil hooking plates 106 and located at the outside of support anchor pipe 101, the outer wall of support anchor pipe 101 is arrayedly provided with embedding slot 104 for soil hooking plate 106 to embed, the top of embedding slot 104 is fixedly connected with slope plate 105, the one end of support anchor pipe 101 and located below soil hooking plate 106 is fixedly connected with tail ring 108, the top of tail ring 108 and located in the middle of through slot 110 is fixedly connected with wedge plate 109, tail ring 108 is provided as the cylindrical with middle hollow, the one end of support anchor pipe 101 is fixedly connected with screw pipe 103, the outer wall of the end of support anchor rod 1, which is opposite to soil hooking plate 106, is rotatably connected with screw cap 102, screw cap 102 is threadedly connected with screw pipe 103.

[0019] According to the above structure, the support anchor rod 1 is pushed forward, the support anchor rod 1 drives soil hooking plate 106 and net bag 107 to move together, the support anchor rod 1 passes through tail ring 108, and soil hooking plate 106 is extruded by wedge plate 109, soil hooking plate 106 rotates towards support anchor pipe 101 and is embedded in embedding slot 104, net bag 107 can be made of nylon, polyester fiber, polypropylene and the like, preferably polypropylene, which has certain deformation contraction ability, so as to follow the rotation and contraction of soil hooking plate 106 and be attached to the outer wall of support anchor pipe 101, at this time, the support anchor rod 1 and support anchor pipe 101 can be embedded in the anchor hole drilled on the slope, when reaching the bottom of the hole, the support anchor rod 1 is pulled outwards, the support anchor rod 1 drives soil hooking plate 106 to move in through slot 110, soil hooking plate 106 is blocked by slope plate 105 and guided to expand outward when moving, net bag 107 expands accordingly, soil hooking plate 106 and net bag 107 contact with the inner wall of the anchor hole, the support anchor rod 1 is continuously pulled, soil hooking plate 106 cannot slide further due to the block of the bottom of embedding slot 104, which drives support anchor pipe 101 to move outwards together, so that soil hooking plate 106 and net bag 107 scrape the virtual soil in the hole to the outside, after the virtual soil is removed, the support anchor rod 1 and support anchor pipe 101 are embedded in the hole, and the rotation of screw cap 102 makes it connected with screw pipe 103, which can fix the position of the support anchor rod 1 and prevent the support anchor rod 1 from shaking when grouting; the sliding of the support anchor rod 1 can control the contraction or expansion of soil hooking plate 106 and net bag 107, which can facilitate the embedding of the support anchor rod 1 and support anchor pipe 101 in the anchor hole of the slope when soil hooking plate 106 and net bag 107 contract, and can push the virtual soil and sludge in the anchor hole out when soil hooking plate 106 and net bag 107 expand, thereby avoiding the virtual soil from damaging the adhesion between the grout and the support anchor rod 1 and support anchor pipe 101, making the grouting more uniform, and improving the pullout resistance and stability.

[0020] The working principle of the utility model is: the support anchor rod 1 is pushed forward, the support anchor rod 1 drives the earth hooking plate 106 and the net bag 107 to move together, the support anchor rod 1 passes through the tail ring 108, and the earth hooking plate 106 is pressed and extruded by the wedge-shaped plate 109, the earth hooking plate 106 rotates to the support anchor pipe 101 and is embedded in the embedding groove 104, the net bag 107 can be made of nylon, polyester fiber, polypropylene and other materials, preferably polypropylene, has certain deformation contraction ability, so as to be able to follow the rotation contraction of the earth hooking plate 106 and be attached to the outer wall of the support anchor pipe 101, at this time, the support anchor rod 1 and the support anchor pipe 101 can be embedded in the anchor hole drilled on the slope, when reaching the hole bottom, the support anchor rod 1 is pulled outwards, the support anchor rod 1 drives the earth hooking plate 106 to move in the through slot 110, the earth hooking plate 106 is blocked and guided outwardly by the slope plate 105 when moving, the net bag 107 expands accordingly, the earth hooking plate 106 and the net bag 107 contact the inner wall of the anchor hole, the support anchor rod 1 is continuously pulled, the earth hooking plate 106 is blocked by the bottom of the embedding groove 104 and cannot slide again, so as to drive the support anchor pipe 101 to move outwards, so that the earth hooking plate 106 and the net bag 107 scrape the virtual soil in the hole to the outside, after the virtual soil is removed, the support anchor rod 1 and the support anchor pipe 101 are embedded in the hole, the nut 102 is rotated to be connected with the screw pipe 103, so as to fix the position of the support anchor rod 1, preventing the support anchor rod 1 from shaking when grouting.

[0021] The above only is the preferred implementation of the utility model, it should be pointed out that, for the ordinary skilled person in the art, without departing from the principle of the utility model, can make a number of improvements and refinements, these improvements and refinements also should be regarded as the protection scope of the utility model. The structure, device and operation method not specifically described and explained in the utility model, if no special description and limitation, are implemented according to the conventional means in the art.

Claims

1. An earthwork excavation support structure comprising a support anchor (1) characterised in that: The outer wall of the support anchor rod (1) is slidably connected with a support anchor pipe (101), one end of the support anchor rod (1) is arrayedly rotatably connected with a soil hooking plate (106), one end of the support anchor pipe (101) is arrayedly provided with a through slot (110) for the soil hooking plate (106) to pass through, a plurality of the soil hooking plates (106) are fixedly connected with a net bag (107) between the soil hooking plates (106) and outside the support anchor pipe (101), the outer wall of the support anchor pipe (101) is arrayedly provided with an embedding slot (104) for the soil hooking plate (106) to embed, the top of the embedding slot (104) is fixedly connected with a slope plate (105), and one end of the support anchor pipe (101) and below the soil hooking plate (106) is fixedly connected with a tail ring (108).

2. A soil excavation support structure according to claim 1, wherein: The top of the tail ring (108) and the middle of the through slot (110) are fixedly connected with a wedge-shaped plate (109).

3. The earthwork excavation support structure of claim 1, wherein: The tail ring (108) is provided as a hollow cylindrical column, and one end of the support anchor pipe (101) is fixedly connected with a screw pipe (103).

4. A soil excavation support structure according to claim 3 wherein: The outer wall of the support anchor rod (1) at the end away from the soil hooking plate (106) is rotatably connected with a screw cap (102).

5. A soil excavation pit support structure according to claim 4, wherein: The screw cap (102) is threadedly connected with the screw pipe (103).

Images