Excavation retaining wall for soft foundation replacement and use method thereof

Abstract

The present invention relates to the technical field of retaining walls, and in particular to an excavation retaining wall for soft foundation replacement and a method of using the same. The excavation retaining wall for soft foundation replacement of the present invention includes a first baffle and a bottom plate, etc.; the bottom plate is fixedly connected to the first baffle. The present invention realizes that when replacement construction is required and the present invention is dismantled, the threaded rod is separated from the soil and separated from the first baffle, and then the slider drives the first support rod and the second support rod to approach the first baffle, and the block slides upward in the second slide groove, so that the second support rod is adaptively contracted to the inside of the second slide groove until the first support rod and the second support rod are in contact with the first baffle, thereby effectively preventing the first support rod, the second support rod and the fan-shaped folding plate from affecting manual excavation operations.

Description

Technical Field

[0001] The invention relates to the technical field of retaining walls, and in particular to an excavation retaining wall used for soft foundation replacement and a use method thereof. Background Art

[0002] Soft foundation replacement refers to digging out the soft soil layer within a certain range below the foundation ground, and then backfilling it with high-strength and low-compressibility materials such as sand, gravel, and ash soil. Due to the high water content and poor stability of the soft soil foundation, the highly inclined pit wall is prone to collapse. Therefore, during the construction process, retaining walls are usually used to temporarily resist and protect the newly excavated pit walls.

[0003] After the retaining wall has resisted the pit wall for a period of time, it needs to be removed to facilitate the next step of replacement construction and to protect other excavated pit walls. However, the horizontal plate on one side of the existing T-shaped retaining wall is pressed under the soil, so that the soil's own gravity is used to offset the horizontal squeezing force of the soil on the vertical plate of the T-shaped retaining wall. However, at the corner of the T-shaped retaining wall close to the soil side, a connecting plate is provided to increase the tensile strength and shear strength of the corner. As a result, when the soil above the horizontal plate of the T-shaped retaining wall is subsequently excavated to facilitate the removal of the L-shaped retaining wall, the connecting plate at the corner will affect the workers' excavation and cleaning operations of the soil. Summary of the invention

[0004] In order to overcome the disadvantage that the connecting plates at the corners of the existing T-shaped retaining wall affect the workers' soil cleaning operation, the present invention provides an excavation retaining wall for soft foundation replacement and a use method thereof.

[0005] The technical solution of the present invention is: an excavation retaining wall for soft foundation replacement, comprising a first baffle and a bottom plate; the bottom plate is fixedly connected to the first baffle; it also comprises a first support rod, a sliding block, a second support rod, a fixed plate and a drainage assembly; the first baffle is rotatably connected to a plurality of first support rods through a fixed block, and a second slide groove is provided in the first support rod; a plurality of first slide grooves are provided on the bottom plate; a sliding block is slidably connected in each first slide groove; a second support rod is rotatably connected on each slider; each second support rod is slidably connected to the corresponding first support rod; a clamping block is provided on each second support rod; the diameter of the notch of the second slide groove is smaller than the diameter of the clamping block; a fixed plate is fixedly connected to each slider, and the fixed plate is slidably connected to the first baffle; a drainage assembly for removing moisture from the soil is connected to the bottom plate.

[0006] Furthermore, the drainage component includes a retaining net, a connecting pipe and a drainage pipe; a plurality of filter tanks are provided on the bottom plate; a plurality of retaining nets are fixedly connected in each filter tank; all the filter tanks are connected to a connecting pipe; and a plurality of drainage pipes are connected to the connecting pipe.

[0007] Furthermore, sand and gravel materials to be backfilled are placed between every two adjacent retaining nets.

[0008] Furthermore, a plurality of fan-shaped folding plates are fixedly connected to the first baffle plate, and a side of each fan-shaped folding plate away from the first baffle plate is fixedly connected to a corresponding first support rod.

[0009] Furthermore, it also includes a threaded rod; each fixing plate is screwed with a threaded rod; and the threaded rod passes through the first baffle.

[0010] Furthermore, it also includes a second baffle; a plurality of T-bars are arranged on the first baffle; the second baffle is connected to the first baffle, and a plurality of T-slots are opened on the second baffle; the T-bars on the first baffle are all located in the T-slots corresponding to the second baffle, each T-bar is opened with a plurality of through holes, and a plurality of bolts penetrating the T-slots are arranged on the second baffle.

[0011] Furthermore, a rotating wrench is provided on the upper side of each threaded rod.

[0012] Furthermore, a fixing ear piece is respectively provided on the left side and the right side of the first baffle plate and the second baffle plate.

[0013] Furthermore, it also includes a push block; two push blocks are fixedly connected to the slider and are symmetrically arranged on the left and right; each filter slot is distributed on the left or right side of the corresponding first slide slot; each push block is located between two adjacent baffles.

[0014] A method for using an excavation retaining wall for soft foundation replacement and filling, comprising the following steps:

[0015] Step 1: Place the rear side of the retaining wall toward the pit wall so that the bottom plate is pressed under the soil, and the soil's own gravity offsets the horizontal pressure of the soil on the first baffle and the second baffle, thereby resisting the pit wall;

[0016] Step 2: The soil is intercepted by the sand and gravel between the retaining nets, and then the accumulated water in the soil can flow through the filter tank, connecting pipe and drainage pipe in sequence and then be discharged forward;

[0017] Step three: The first support rod, the second support rod and the fan-shaped folding plate are driven by the slider to fit with the first baffle, thereby effectively preventing the first support rod, the second support rod and the fan-shaped folding plate from affecting manual digging operations.

[0018] The beneficial effect is that the present invention realizes that after manually pushing the second baffle upward or downward to a desired height, bolts are respectively passed through the corresponding through holes on the lower side of the T-slot and the T-bar to fix the second baffle to each other, so that the first baffle and the second baffle can cooperate to achieve resistance to pit walls of different heights, which is conducive to improving universality;

[0019] When the first baffle, the second baffle and the bottom plate resist the soil, the accumulated water in the soil gradually flows downward, passes through the baffle net and enters the filter tank, then flows through the connecting pipe and is discharged forward from the drainage pipe, while the mud is intercepted by the baffle net, and the sand and gravel between the two baffle nets intercept the finer mud, further ensuring the interception effect of the baffle net on the mud;

[0020] When replacement construction is required and the present invention is to be dismantled, the threaded rod is separated from the soil and the first baffle, and then the slider drives the first support rod and the second support rod toward the first baffle, and the block slides upward in the second slide groove, so that the second support rod adaptively shrinks to the inside of the second slide groove until the first support rod and the second support rod are in contact with the first baffle, thereby effectively preventing the first support rod, the second support rod and the fan-shaped folding plate from affecting manual digging operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the three-dimensional structure of the excavation retaining wall for soft foundation replacement of the present invention from a first viewing angle;

[0022] Figure 2 A state diagram of the first baffle and the second baffle of the present invention resisting the soil;

[0023] Figure 3 It is a schematic diagram of the three-dimensional structure of the excavation retaining wall for soft foundation replacement of the present invention from a second viewing angle;

[0024] Figure 4 It is a schematic diagram of a three-dimensional structure of a combination of a slider, a second support rod, a fixing plate, a threaded rod and a fan-shaped folding plate of the present invention;

[0025] Figure 5 It is a schematic diagram of the three-dimensional structure of the baffle and the connecting pipe combination of the present invention;

[0026] Figure 6 It is a schematic diagram of the three-dimensional structure of the connecting pipe and the drainage pipe combination of the present invention.

[0027] In the accompanying drawings: 1-first baffle, 1001-T-shaped bar, 2-second baffle, 2001-T-shaped groove, 3-bottom plate, 3001-first slide groove, 3002-filter groove, 4-first support rod, 4001-second slide groove, 5-slider, 6-second support rod, 6001-block, 7-fixed plate, 8-threaded rod, 8001-rotating wrench, 9-fan-shaped folding plate, 101-blocking net, 102-connecting pipe, 103-drainage pipe, 201-push block. DETAILED DESCRIPTION

[0028] Embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0029] Example 1

[0030] A cut retaining wall used for replacing soft foundation, such as Figure 1-Figure 6 As shown, it includes a first baffle plate 1 and a bottom plate 3; the bottom plate 3 is fixedly connected to the rear side of the first baffle plate 1;

[0031] It also includes a first support rod 4, a slider 5, a second support rod 6, a fixed plate 7 and a drainage component; three first support rods 4 are rotatably connected to the rear side of the first baffle 1 through a fixed block, and a second slide groove 4001 is provided in the first support rod 4; three first slide grooves 3001 are provided on the bottom plate 3; a slider 5 is slidably connected in each first slide groove 3001; a second support rod 6 is rotatably connected to each slider 5; each second support rod 6 is slidably connected to the corresponding first support rod 4; a clamping block 6001 is provided on each second support rod 6; the diameter of the notch of the second slide groove 4001 is smaller than the diameter of the clamping block 6001; a fixed plate 7 is fixedly connected to each slider 5, and the fixed plate 7 is slidably connected to the first baffle 1; a drainage component is connected to the bottom plate 3.

[0032] The drainage assembly includes a retaining net 101, a connecting pipe 102 and a drainage pipe 103; the bottom plate 3 is provided with six filter slots 3002; each filter slot 3002 is fixed with two retaining nets 101; all the filter slots 3002 are connected to a connecting pipe 102; and the connecting pipe 102 is connected to two drainage pipes 103.

[0033] Sand and gravel materials to be backfilled are placed between every two adjacent retaining nets 101 .

[0034] Three fan-shaped folded plates 9 are fixedly connected to the first baffle plate 1 , and a side of each fan-shaped folded plate 9 away from the first baffle plate 1 is fixedly connected to a corresponding first support rod 4 .

[0035] It also includes a threaded rod 8 ; each fixing plate 7 is screwed with a threaded rod 8 ; and the threaded rod 8 passes through the first baffle 1 .

[0036] It also includes a second baffle plate 2; two T-shaped bars 1001 are arranged on the first baffle plate 1; the second baffle plate 2 is connected to the first baffle plate 1, and two T-shaped slots 2001 are provided on the second baffle plate 2; the T-shaped bars 1001 on the first baffle plate 1 are all located in the T-shaped slots 2001 corresponding to the second baffle plate 2, each T-shaped bar 1001 is provided with a plurality of through holes, and the second baffle plate 2 is provided with two bolts penetrating the T-shaped slots 2001; the second baffle plate 2 can slide up and down on the first baffle plate 1, and the second baffle plate 2 can be fixed to the first baffle plate 1 by passing the bolts through the corresponding through holes on the T-shaped bars 1001.

[0037] A rotating wrench 8001 is provided on the upper side of each threaded rod 8 to facilitate manual rotation of the threaded rod 8 .

[0038] A fixing ear piece is respectively arranged on the left side and the right side of the first baffle plate 1 and the second baffle plate 2 .

[0039] like Figure 1 As shown, the side where the threaded rod 8 is located is the front side. When in use, Figure 2 As shown, in a foundation pit where soft foundation is to be replaced, at the pit wall where retaining and slope protection are required, multiple of the present inventions are placed side by side horizontally, with the rear side of the present invention facing the pit wall, and then bolts are used to pass through the fixing ears on the adjacent first baffles 1 and second baffles 2 to fix the adjacent first baffles 1 and second baffles 2 together, and then the gaps between the first baffles 1, the second baffles 2 and the pit wall are manually backfilled so that the bottom plate 3 is pressed under the soil, so that the pit wall of the foundation pit is resisted by the cooperation of the multiple first baffles 1 and the second baffles 2 fixed to each other to prevent the pit wall from collapsing, and at the same time, under the squeezing of the soil on the bottom plate 3, the horizontal pressure of the soil on the first baffle 1 and the second baffle 2 is offset by the soil's own gravity, effectively preventing the present invention from overturning.

[0040] At the same time, the position of the second baffle plate 2 on the first baffle plate 1 can be adjusted according to the height of the pit wall, that is, after manually pushing the second baffle plate 2 upward or downward to the required height, the bolts are respectively passed through the corresponding through holes on the lower side of the T-slot 2001 and the T-bar 1001 to fix the second baffle plate 2 to the first baffle plate 1, so that the first baffle plate 1 and the second baffle plate 2 can cooperate to achieve resistance to pit walls of different heights, which is conducive to improving universality.

[0041] It should be noted that the initial slider 5 is located at the rear side of the first slide groove 3001, the second support rod 6 is pulled to the block 6001 at the notch of the second slide groove 4001, the first support rod 4 and the second support rod 6 are inclined on the first baffle plate 1 and the bottom plate 3, and the fan-shaped folding plate 9 is stretched and expanded, so that the first baffle plate 1 and the bottom plate 3 are fixed by the cooperation of the first support rod 4, the slider 5 and the second support rod 6 to reduce the pressure on the connection between the first baffle plate 1 and the bottom plate 3, and avoid the connection between the first baffle plate 1 and the bottom plate 3 from being broken under the horizontal pressure of the soil on the first baffle plate 1. In order to prevent the slider 5 from sliding in the first slide groove 3001, that is, to affect the stability of the first support rod 4, the slider 5 and the second support rod 6 in fixing the first baffle 1 and the bottom plate 3, the threaded rod 8 is driven downward by manually turning the wrench 8001, so that the threaded rod 8 passes through the first baffle 1 and is inserted into the soil, thereby fixing the fixing plate 7 on the first baffle 1 through the threaded rod 8, and then fixing the slider 5. At the same time, the threaded rod 8 is inserted into the soil to further ensure the stability of the first baffle 1 after it is placed, and effectively prevent the first baffle 1 and the bottom plate 3 and other parts from slipping, which affects the blocking effect on the pit wall.

[0042] In the process of resisting the pit wall by the present invention, it is necessary to timely remove the moisture in the soil behind the first baffle 1 to reduce the water content and pore water pressure of the soil, ensure the stability of the soil, and avoid the pressure of the soil on the first baffle 1 to increase with the increase of moisture. When the first baffle 1, the second baffle 2 and the bottom plate 3 resist the soil, the accumulated water in the soil gradually flows downward, passes through the baffle 101 into the filter tank 3002, and then flows through the connecting pipe 102 and is discharged forward from the drainage pipe 103, while the soil is blocked. The net 101 intercepts the mud to prevent it from entering the connecting pipe 102 and the drainage pipe 103, thereby blocking the connecting pipe 102 and the drainage pipe 103. Furthermore, in order to prevent relatively fine mud from passing through the mesh of the net 101, two nets 101 are arranged in the filter tank 3002. The two nets 101 are manually filled with materials to be backfilled, such as sand and gravel, in advance. The sand and gravel between the two nets 101 intercepts relatively fine mud, thereby further ensuring the interception effect of the net 101 on mud.

[0043] When replacement and filling construction is required and the present invention is to be dismantled, the soil above the bottom plate 3 must be manually excavated first. However, since the first support rod 4, the second support rod 6 and the fan-shaped folding plate 9 are located above the bottom plate 3, the manual excavation operation will be blocked. In order to facilitate the manual excavation operation, the threaded rod 8 is separated from the soil and from the first baffle plate 1 by manually rotating the rotating wrench 8001, and then the fixing plate 7 and the sliding block 5 are manually pulled forward, and then the first support rod 4 and the second support rod 6 are driven by the sliding block 5 to approach the first baffle plate 1, and the second support rod 6 pushes the fan-shaped folding plate 9 to shrink and fold toward the first baffle plate 1, and the block 6001 slides upward in the second slide groove 4001, so that the second support rod 6 adaptively shrinks to the inside of the second slide groove 4001 until the first support rod 4 and the second support rod 6 are in contact with the first baffle plate 1, thereby effectively preventing the first support rod 4, the second support rod 6 and the fan-shaped folding plate 9 from affecting the manual excavation operation.

[0044] Example 2

[0045] On the basis of Example 1, Figure 4 and Figure 5 As shown, it also includes a push block 201; two push blocks 201 are fixedly connected to the slider 5 and are symmetrically arranged on the left and right sides; each filter slot 3002 is distributed on the left or right side of the corresponding first slide slot 3001; each push block 201 is located between two adjacent baffles 101.

[0046] A method for using an excavation retaining wall for soft foundation replacement and filling, comprising the following steps:

[0047] Step 1: Place the rear side of the retaining wall toward the pit wall so that the bottom plate 3 is pressed under the soil, and the soil's own gravity offsets the horizontal pressure of the soil on the first baffle plate 1 and the second baffle plate 2, thereby resisting the pit wall;

[0048] Step 2: The soil is intercepted by the sand and gravel between the retaining net 101 and the retaining net 101, and then the accumulated water in the soil can flow through the filter tank 3002, the connecting pipe 102 and the drainage pipe 103 in sequence and then be discharged forward;

[0049] Step three: The first support rod 4, the second support rod 6 and the fan-shaped folding plate 9 are driven by the slider 5 to fit with the first baffle 1, thereby effectively preventing the first support rod 4, the second support rod 6 and the fan-shaped folding plate 9 from affecting manual digging operations.

[0050] After the soil is blocked for a period of time by the present invention, a lot of fine soil may enter between the two baffle nets 101. In order to ensure the next use, the sand and gravel between the two baffle nets 101 need to be replaced. When the present invention is dismantled, the threaded rod 8 is manually unscrewed from the first baffle plate 1, and then the fixed plate 7 and the slider 5 are manually driven to move forward, and the slider 5 simultaneously drives the push block 201 to move forward, so that the push block 201 is used to scrape between the two baffle nets 101, and the sand and gravel and soil are pushed forward to separate from the baffle nets 101, that is, the sand and gravel and soil between the two baffle nets 101 are quickly cleaned up by the push block 201, and then the fixed plate 7 and the slider 5 are pushed backward to reset. It should be noted that the sand and gravel and soil pushed out by the push block 201 are used as backfill material of the foundation pit to avoid waste of filler between the two baffle nets 101.

[0051] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. An excavation retaining wall for soft foundation replacement, comprising a first baffle (1) and a bottom plate (3); the bottom plate (3) is fixedly connected to the first baffle (1); the characteristics are: The utility model also comprises a first support rod (4), a sliding block (5), a second support rod (6), a fixing plate (7) and a drainage assembly; a plurality of first support rods (4) are rotatably connected to the first baffle plate (1) through a fixing block, and a second sliding groove (4001) is provided in the first support rod (4); a plurality of first sliding grooves (3001) are provided on the bottom plate (3); a sliding block (5) is slidably connected in each first sliding groove (3001); a second support rod (6) is rotatably connected to each sliding block (5); each second support rod (6) is slidably connected to the corresponding first support rod (4); a clamping block (6001) is provided on each second support rod (6); the diameter of the notch of the second sliding groove (4001) is smaller than the diameter of the clamping block (6001); a fixing plate (7) is fixedly connected to each sliding block (5), and the fixing plate (7) is slidably connected to the first baffle plate (1); a drainage assembly for draining moisture in the soil is connected to the bottom plate (3); The drainage component comprises a retaining net (101), a connecting pipe (102) and a drainage pipe (103); a plurality of filter slots (3002) are provided on the bottom plate (3); a plurality of retaining nets (101) are fixedly connected in each filter slot (3002); all the filter slots (3002) are connected to a connecting pipe (102); and a plurality of drainage pipes (103) are connected to the connecting pipe (102); A plurality of fan-shaped folding plates (9) are fixedly connected to the first baffle plate (1), and a side of each fan-shaped folding plate (9) away from the first baffle plate (1) is fixedly connected to a corresponding first support rod (4); It also includes a threaded rod (8); each fixing plate (7) is screwed with a threaded rod (8); and the threaded rod (8) passes through the first baffle (1); It also comprises a second baffle plate (2); a plurality of T-shaped bars (1001) are arranged on the first baffle plate (1); the second baffle plate (2) is connected to the first baffle plate (1), and a plurality of T-shaped slots (2001) are provided on the second baffle plate (2); the T-shaped bars (1001) on the first baffle plate (1) are all located in the T-shaped slots (2001) corresponding to the second baffle plate (2), each T-shaped bar (1001) is provided with a plurality of through holes, and the second baffle plate (2) is provided with a plurality of bolts penetrating the T-shaped slots (2001); It also includes a push block (201); two push blocks (201) are fixedly connected to the slider (5) and are arranged symmetrically on the left and right; each filter slot (3002) is distributed on the left or right side of the corresponding first slide slot (3001); and each push block (201) is located between two adjacent blocking nets (101).

2. The excavation retaining wall for soft foundation replacement according to claim 1, characterized in that: Sand and gravel materials to be backfilled are placed between every two adjacent retaining nets (101).

3. The excavation retaining wall for soft foundation replacement according to claim 2 is characterized in that: A turning wrench (8001) is provided on the upper side of each threaded rod (8).

4. The excavation retaining wall for soft foundation replacement according to claim 3 is characterized in that: A fixing ear piece is respectively provided on the left side and the right side of the first baffle plate (1) and the second baffle plate (2).

5. A method for using an excavation retaining wall for replacing soft foundation, the method for using the excavation retaining wall for replacing soft foundation according to claim 4, characterized in that: The following steps are involved: Step 1: Place the rear side of the retaining wall toward the pit wall so that the bottom plate (3) is pressed under the soil, and the soil's own gravity offsets the horizontal pressure of the soil on the first baffle plate (1) and the second baffle plate (2), thereby achieving resistance to the pit wall; Step 2: The soil is intercepted by the retaining net (101) and the sand and gravel between the retaining net (101), and then the accumulated water in the soil flows through the filter tank (3002), the connecting pipe (102) and the drainage pipe (103) in sequence and then discharged forward; Step three: The first support rod (4), the second support rod (6) and the fan-shaped folding plate (9) are driven by the slider (5) to fit with the first baffle (1), thereby effectively preventing the first support rod (4), the second support rod (6) and the fan-shaped folding plate (9) from affecting manual digging operations.

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