A ground-connected wall trench collapse prevention device and its installation method

Abstract

The present invention discloses a device for preventing the collapse of a ground-connected wall trench wall and an installation method thereof. The device for preventing the diffusion of the collapse of the ground-connected wall trench wall comprises: a geotextile, wherein the geotextile comprises a covering portion located in the middle and used to cover the first surface and two winding portions located on both sides of the middle portion; two rotating shafts for the two winding portions of the geotextile to be wound around respectively, and the two side surfaces of the ground-connected wall reinforcement cage are respectively connected with a first connecting piece for rotationally connecting the rotating shaft; two limiting assemblies are respectively arranged on the opposite inner sides of the two rotating shafts, and the two side surfaces of the ground-connected wall reinforcement cage are respectively connected with a second connecting piece for connection of the limiting assemblies. The present application prevents soil from invading the ground-connected wall reinforcement cage.

Description

Technical Field

[0001] The present invention relates to the technical field of ground-connected wall construction, and in particular to a ground-connected wall trench wall collapse prevention device and an installation method thereof. Background Art

[0002] It is suitable for the construction of ground-anchored walls in water-rich sand and gravel layers. The quality of trenching for ground-anchored walls in sand and gravel layers has always been a major problem in ground-anchored wall construction. Because the disturbed sand and gravel layers are difficult to trench under the action of groundwater (especially pressurized water), collapse of holes is very likely to occur.

[0003] If a large area of ​​collapse occurs after the ground-anchored wall reinforcement cage is in place, burying the lower portion of the cage in the soil may make it impossible to lift the ground-anchored wall out. Forced lifting would severely disturb the surrounding soil, affecting the formation of the next trench section, and overload the machinery, potentially causing safety accidents. In such situations, traditional construction practices often rely on pouring concrete quickly in the upper, uncollapsed area, with the designer's approval, and then performing reinforcement later based on the specific project conditions. This is unsafe and time-consuming and labor-intensive. Summary of the Invention

[0004] The purpose of the present invention is to overcome the defects of the prior art and provide a ground-connected wall trench wall collapse prevention and diffusion device and its installation method, so as to prevent the soil from diffusing to the steel cage and affecting the pouring and strength when the trench wall collapses.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is a ground-connected wall trench wall collapse prevention device, wherein the first surface of the ground-connected wall reinforcement cage is the soil-facing surface or the excavation surface, and the two opposite surfaces are side surfaces. The ground-connected wall trench wall collapse prevention device comprises:

[0006] A geotextile, comprising a covering portion located in the middle and used to cover the first surface, and two rolling portions located on both sides of the middle portion;

[0007] Two rotating shafts for winding the two winding parts of the geotextile respectively, and two side surfaces of the ground-connected wall reinforcement cage are respectively connected with first connecting pieces for rotating connection of the rotating shafts;

[0008] Two limiting assemblies are respectively arranged on the inner sides of the two rotating shafts, and two side surfaces of the ground-connected wall reinforcement cage are respectively connected with second connecting pieces for connecting the limiting assemblies;

[0009] The limiting assembly includes: two waist-shaped guide rings arranged at intervals along the axial direction of the rotating shaft, the first end of the waist-shaped guide ring is connected to the side of the ground-connected wall reinforcement cage through the second connecting piece, and the second end is relatively outward and inclined in the direction away from the covering part of the geotextile; a guide rod passing between the two waist-shaped guide rings and movable along the length direction of the waist-shaped guide ring, a gap is formed between the guide rod and the rotating shaft on the same side for the winding part to pass through and be wound back to the rotating shaft on the same side, a first clamping rod is fixed radially on the outer periphery of the rotating shaft, and a second clamping rod is fixed on the outer periphery of the guide rod in the direction pointing to the rotating shaft on the same side, and the sum of the lengths of the first clamping roller and the second clamping roller is between the distance from the guide roller to the rotating shaft when it is located at the first end of the waist-shaped guide ring and the distance from the guide roller to the rotating shaft when it is located at the second end of the waist-shaped guide ring.

[0010] A further improvement of the ground-wall trench wall collapse prevention device of the present invention is that the guide rods are two steel bars fixed side by side, and the cross-sectional dimensions of the guide rods are adapted to the waist-shaped guide ring.

[0011] A further improvement of the ground-connected wall trench wall collapse prevention device of the present invention is that the length of the geotextile is at least 500 mm shorter than the length of the ground-connected wall reinforcement cage.

[0012] A further improvement of the ground-connecting wall trench wall collapse prevention device of the present invention is that it also includes baffles for fixing to the bottoms of the two side surfaces of the steel cage.

[0013] A further improvement of the ground wall trench wall collapse prevention device of the present invention is that the distance between the two waist-shaped guide rings is not less than the length of the geotextile in the direction of the rotation axis.

[0014] A method for installing a ground-connected wall trench wall collapse prevention device comprises the following steps:

[0015] Provide the above-mentioned ground-connected wall trench collapse prevention device;

[0016] Fixing the first connecting piece and the second connecting piece on two sides of the ground-connected wall reinforcement cage;

[0017] Rotatingly connecting the two rotating shafts to the first connecting member respectively;

[0018] Placing two waist-shaped guide rings on opposite inner sides of the two rotating shafts, respectively, connecting the first ends of the waist-shaped guide rings to the corresponding second connecting members, and slanting the second ends thereof relatively outward;

[0019] Insert the guide rod between the two waist-shaped guide rings, rotate the guide rod so that the second clamping rod points to the rotating shaft on the same side, and move the guide rod so that the second clamping rod is away from the first clamping rod;

[0020] The covering portion of the geotextile is placed on the soil-facing or excavation-facing surface of the wall reinforcement cage, away from the second end of the waist-shaped guide ring, and the winding portions on both sides are passed through the gap between the rotating shaft and the guide rod and wound in reverse directions on the rotating shaft. Compared with the prior art, the advantages of the present invention are:

[0021] 1. When the ground-connected wall trench collapses, the geotextile can be adaptively tightened to prevent soil from entering the steel cage. During normal use, the geotextile is always in a relaxed state for easy pouring and compaction, with strong practicality and low cost.

[0022] 2. By arranging two steel bars fixed side by side on the guide rod, the guide rod will not rotate in the waist-shaped guide ring, thereby preventing the second clamping rod from rotating. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0024] Figure 1 It is a front view of the ground-connected wall trench wall collapse prevention device of the present invention.

[0025] Figure 2 This is a schematic diagram of the detailed structure of the ground-connected wall trench wall collapse prevention device of the present invention in a stress-free state.

[0026] Figure 3 This is a schematic diagram of the detailed structure of the trench wall collapse prevention device of the ground-connected wall trench wall collapse in the collapsed state.

[0027] Figure 4 This is a schematic diagram of the detailed structure of the concrete pouring state of the ground-connected wall trench wall collapse prevention device of the present invention.

[0028] In the figure: 1. Geotextile; 2. Rotating shaft; 3. Baffle; 4. Waist-shaped guide ring; 5. Guide rod; 6. First clamping rod; 7. Second clamping rod. DETAILED DESCRIPTION

[0029] The following describes the embodiments of the present invention through specific examples. Those skilled in the art will readily understand the other advantages and benefits of the present invention from the disclosure herein. The present invention may also be implemented or applied through various other specific embodiments, and the details in this specification may be modified or altered based on different viewpoints and applications without departing from the spirit of the present invention.

[0030] The following is a further detailed description of the ground connection wall trench wall collapse prevention device and the installation method of the present invention in conjunction with the accompanying drawings and specific embodiments.

[0031] See also Figures 1 to 4 As shown, the ground-connected wall trench wall collapse prevention device is provided, wherein the first surface of the ground-connected wall reinforcement cage is the soil facing surface or the excavation surface, and the two opposite surfaces are the side surfaces. The ground-connected wall trench wall collapse prevention device comprises:

[0032] A geotextile 1, comprising a covering portion located in the middle and used to cover the first surface, and two rolling portions located on both sides of the middle portion;

[0033] Two rotating shafts 2 are respectively provided for winding the two winding parts of the geotextile 1, and two sides of the ground-connected wall reinforcement cage are respectively connected with first connecting members for rotating connection of the rotating shafts 2;

[0034] Two limiting assemblies are respectively arranged on the inner sides of the two rotating shafts 2, and two side surfaces of the ground-connected wall reinforcement cage are respectively connected with second connecting pieces for connecting the limiting assemblies;

[0035] The limiting assembly includes: two waist-shaped guide rings 4 axially spaced apart along the rotating shaft 2, the first end of the waist-shaped guide ring 4 is connected to the side of the ground-connected wall reinforcement cage through the second connecting piece, and the second end is relatively outward and inclined in the direction away from the covering part of the geotextile 1; a guide roller 5 passing between the two waist-shaped guide rings 4 and movable along the length direction of the waist-shaped guide ring 4, a gap is formed between the guide roller 5 and the rotating shaft 2 on the same side for the winding part to pass through and be wound back to the rotating shaft 2 on the same side, a first clamping roller 6 is fixed radially on the outer periphery of the rotating shaft 2, and a second clamping roller 7 is fixed on the outer periphery of the guide roller 5 in the direction pointing to the rotating shaft 2 on the same side, and the sum of the lengths of the first clamping roller and the second clamping roller is between the distance from the guide roller to the rotating shaft 2 when it is located at the first end of the waist-shaped guide ring 4 and the distance from the guide roller to the rotating shaft 2 when it is located at the second end of the waist-shaped guide ring 4.

[0036] Through the anti-diffusion device, the geotextile 1 can be adaptively tightened to prevent soil from entering the steel cage when the ground-connected wall trench collapses. During normal use, the geotextile 1 is always in a relaxed state for easy pouring and compaction, which is highly practical and low in cost.

[0037] Preferably, the guide rods 5 are two steel bars fixed side by side, and the cross-sectional dimensions of the guide rods 5 are adapted to the waist-shaped guide ring 4 .

[0038] By configuring the guide rods 5 as two steel bars fixed side by side and having a cross-sectional size that matches the guide steel bar ring, the guide rods 5 will not rotate in the guide steel bar ring, thereby preventing the second clamping rod 7 from rotating.

[0039] Preferably, the length of the geotextile 1 is at least 500 mm shorter than the length of the ground-anchored wall reinforcement cage.

[0040] By reserving a gap of 500 mm, when a cavity is left between the outer side of the geotextile 1 and the wall of the ground-connected wall groove, secondary pouring can be carried out through the gap to compact the cavity and improve the structural stability.

[0041] Preferably, it further includes baffles 3 for fixing at the bottom of two side surfaces of the steel cage.

[0042] By providing the baffle 3, it is ensured that soil will not enter the ground-connected wall reinforcement cage from both sides, thereby ensuring structural stability.

[0043] Preferably, the distance between the two waist-shaped guide rings 4 is not less than the length of the geotextile 1 in the direction of the rotating shaft 2 .

[0044] Provided is a method for installing a ground-connected wall trench wall collapse prevention device, comprising the following steps:

[0045] S1: Provide the above-mentioned ground-connected wall trench collapse prevention device;

[0046] S2: Fixing the first connecting piece and the second connecting piece on two sides of the ground-connected wall reinforcement cage;

[0047] S3: Rotate and connect the two rotating shafts 2 to the first connecting member respectively;

[0048] S4: Place the two waist-shaped guide rings 4 on the opposite inner sides of the two rotating shafts 2, connect the first ends of the waist-shaped guide rings 4 to the corresponding second connecting members, and tilt the second ends outwards.

[0049] S5: Insert the guide rod 5 between the two waist-shaped guide rings 4, rotate the guide rod 5 so that the second clamping rod 7 points to the rotating shaft 2 on the same side, and move the guide rod 5 so that the second clamping rod 7 is away from the first clamping rod 6;

[0050] S6: Cover the covering part of the geotextile 1 on the soil facing surface or excavation surface of the second end of the wall-connected reinforcement cage away from the waist-shaped guide ring 4, and make the winding parts on both sides pass through the gap between the rotating shaft 2 and the guide rod 5 and be wound around the rotating shaft 2 in the opposite direction.

[0051] The operating mechanism of the present application is as follows: Under normal use, the guide rod 5 is clamped on the first end of the waist-shaped guide ring 4;

[0052] When the trench wall collapses, the geotextile 1 applies pressure to the guide rod 5, and the guide rod 5 slides to the second end along the length direction of the waist-shaped guide ring 4. The first clamping rod 6 and the second clamping rod 7 engage to limit the rotation of the rotating shaft 2, and the geotextile 1 is in a taut state.

[0053] During the concrete pouring state, under the pressure of the concrete, the geotextile 1 and the guide rod 5 do not affect each other, and the geotextile 1 is in a relaxed state. The geotextile 1 is squeezed to the side away from the ground-connected wall reinforcement cage until the concrete is poured densely.

[0054] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for understanding and reading by those familiar with this technology, and are not used to limit the conditions for implementation of the present invention. Therefore, they have no substantial technical significance. Any modification of the structure, change in the proportional relationship, or adjustment of the size should still fall within the scope of the technical content disclosed by the present invention without affecting the efficacy and purpose that can be achieved by the present invention. At the same time, terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description and are not used to limit the scope of implementation of the present invention. Changes or adjustments in their relative relationships should also be regarded as the scope of implementation of the present invention without substantially changing the technical content.

[0055] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technician familiar with this profession can make some changes or modifications to equivalent embodiments of the technical contents disclosed above without departing from the scope of the technical solution of the present invention. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A device for preventing the collapse and diffusion of a ground-connected wall trench wall, wherein the first surface of the ground-connected wall reinforcement cage is the soil-facing surface or the excavation surface, and the two opposite surfaces are side surfaces, characterized in that: The ground-connected wall trench collapse prevention device comprises: A geotextile, comprising a covering portion located in the middle and used to cover the first surface, and two rolling portions located on both sides of the middle portion; Two rotating shafts for winding the two winding parts of the geotextile respectively, and two side surfaces of the ground-connected wall reinforcement cage are respectively connected with first connecting pieces for rotating connection of the rotating shafts; Two limiting assemblies are respectively arranged on the inner sides of the two rotating shafts, and two side surfaces of the ground-connected wall reinforcement cage are respectively connected with second connecting pieces for connecting the limiting assemblies; The limiting assembly includes: two waist-shaped guide rings arranged at intervals along the axial direction of the rotating shaft, the first end of the waist-shaped guide ring is connected to the side of the ground-connected wall reinforcement cage through the second connecting piece, and the second end is relatively outward and inclined in the direction away from the covering part of the geotextile; a guide rod passing between the two waist-shaped guide rings and movable along the length direction of the waist-shaped guide ring, a gap is formed between the guide rod and the rotating shaft on the same side for the winding part to pass through and be wound back to the rotating shaft on the same side, a first clamping rod is fixed radially on the outer periphery of the rotating shaft, and a second clamping rod is fixed on the outer periphery of the guide rod in the direction pointing to the rotating shaft on the same side, and the sum of the lengths of the first clamping roller and the second clamping roller is between the distance from the guide roller to the rotating shaft when it is located at the first end of the waist-shaped guide ring and the distance from the guide roller to the rotating shaft when it is located at the second end of the waist-shaped guide ring.

2. The ground-connected wall trench collapse prevention device according to claim 1, characterized in that: The guide rods are two steel bars fixed side by side, and the cross-sectional dimensions of the guide rods are adapted to the waist-shaped guide ring.

3. The ground-connected wall trench collapse prevention device according to claim 1, characterized in that: The length of the geotextile is at least 500 mm shorter than the length of the ground-anchored wall reinforcement cage.

4. The ground-connected wall trench collapse prevention device according to claim 1, characterized in that: Also included are baffles for fixing to the bottom of two sides of the steel cage.

5. The ground-connected wall trench collapse prevention device according to claim 1, characterized in that: The distance between the two waist-shaped guide rings is not less than the length of the geotextile in the direction of the rotating shaft.

6. A method for installing a ground-connected wall trench collapse prevention device, characterized in that: Including steps: Provided is a ground-connected wall trench collapse prevention device as claimed in claim 1; Fixing the first connecting piece and the second connecting piece on two sides of the ground-connected wall reinforcement cage; Rotatingly connecting the two rotating shafts to the first connecting member respectively; Placing two waist-shaped guide rings on opposite inner sides of the two rotating shafts, respectively, connecting the first ends of the waist-shaped guide rings to the corresponding second connecting members, and slanting the second ends thereof relatively outward; Insert the guide rod between the two waist-shaped guide rings, rotate the guide rod so that the second clamping rod points to the rotating shaft on the same side, and move the guide rod so that the second clamping rod is away from the first clamping rod; The covering part of the geotextile is covered on the soil facing surface or excavation surface of the second end of the wall connecting steel cage away from the waist-shaped guide ring, and the winding parts on both sides pass through the gap between the rotating shaft and the guide rod and are reversely wound on the rotating shaft.

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