An adjustable support device for foundation pits and its usage method

Abstract

The present invention discloses an adjustable support device for a foundation pit and its usage method, belonging to the technical field of foundation pits. It includes a support baffle, a support block vertically penetrating the support baffle, a support rod connected to one end of the support block close to the support baffle, a tensioning unit for fixedly connecting the support block and the support baffle, and an adjusting unit arranged on the support rod; the tensioning unit includes a plurality of sliding grooves opened on the side of the support block, a plurality of rectangular holes opened on the side of the support baffle close to the support block and matched with the sliding grooves, and a tensioning member arranged in the sliding grooves and the rectangular holes. The tensioning member includes a rotating plate, a first mounting seat and a slider respectively slidably connected in the sliding grooves and the rectangular holes. The two ends of the slider are respectively connected with a second mounting seat and a clamping block, and both the first mounting seat and the second mounting seat are rotatably connected with the rotating plate. By means of the cooperative setting between the tensioning unit and the adjusting unit, the present invention realizes the length adjustment of the support rod while ensuring the overall structural stability of the device.

Description

Technical Field

[0001] The invention belongs to the technical field of foundation pits, and in particular relates to an adjustable supporting device for a foundation pit and a use method thereof. Background Art

[0002] With the advancement of urbanization, more and more people are pouring into cities, resulting in the construction of a large number of high-rise buildings and infrastructure, and underground engineering projects have also been excavated on a large scale. At the same time, a large number of deep foundation pit projects have been generated, and the depth of the foundation pit is getting deeper and deeper, the surrounding environment is becoming more and more complex, and the requirements for deformation control are getting higher and higher. Deep foundation pit support technology is the best means to control foundation pit deformation. After the piling operation is implemented, in the next step of excavation and subsequent construction, the sheet piles pressed into the ground need to be supported to prevent collapse. Pile support is a device that supports the sheet piles to prevent the deformation of the sheet piles and the collapse of the pit wall. The existing patent document of application number CN201810514568.3, a retractable foundation pit support device and a method for using the device to construct a foundation pit, discloses: including a support plate, a first wire clamping groove, a second wire clamping groove, a telescopic support rod, a limit rod, a first fixed circular ring and a second fixed circular ring; the method for using the device to construct a foundation pit is to install the device on a steel sheet pile and then drive it into one side of the foundation pit, pull the connecting wire on the first wire clamping groove, the first fixed circular ring and the second fixed circular ring move towards each other, lift the limit rod and adjust the position of the telescopic support rod, then pull the connecting wire of the second wire clamping groove, the limit rod and the truncated cone-shaped limit structure of the telescopic support rod are engaged, the first fixed circular ring and the second fixed circular ring are respectively moved to the position where they are tightly against the limit rod, and finally the steel sheet piles of the device are symmetrically arranged on the other side of the foundation pit. The invented device can flexibly adjust the length of the telescopic rod to change the length of the entire support device to meet the support needs of different foundation pits. However, the overall operation of the device is rather complicated, as it requires pulling the two wires in batches and lifting the limit rod at the same time. The operating space is small during actual use, the construction is difficult, and the adjustable distance is only the spacing between the telescopic support rod cones. The cone can only ensure strength when it has a certain width, so the adjustment accuracy is not high enough. Summary of the invention

[0003] In order to solve the above technical problems, the inventors have obtained the technical solution of the present invention through practice and summary. The present invention discloses an adjustable support device for foundation pit, including a support plate, a support block vertically penetrating the support plate, a support rod connected to one end of the support block close to the support plate, a tensioning unit for fixing the support block to the support plate, and an adjustment unit arranged on the support rod;

[0004] The tensioning unit includes a plurality of sliding grooves formed on the side of the support block, a plurality of rectangular holes formed on the side of the support baffle close to the support block and cooperating with the sliding grooves, and a tensioning member disposed in the sliding grooves and the rectangular holes. The tensioning member includes a rotating plate, a first mounting seat and a slider respectively slidably connected in the sliding grooves and the rectangular holes. The two ends of the slider are respectively connected with a second mounting seat and a clamping block, and both the first mounting seat and the second mounting seat are rotatably connected with the rotating plate.

[0005] Further preferably, the adjusting unit includes a hollow screw rod mounted on the support rod, and a first channel steel and a second channel steel respectively vertically disposed at both ends of the hollow screw rod. A nut is sleeved on the hollow screw rod, and one end of the second channel steel far from the hollow screw rod is fixedly connected with the support baffle.

[0006] Further preferably, a plurality of mounting grooves are formed on the side of the hollow screw rod far from the support rod, and the plurality of mounting grooves are annularly distributed.

[0007] Further preferably, a tightening member is disposed in the mounting groove and cooperating with it. The tightening member includes a tightening rod, a round plate and a second spring sleeved on the tightening rod, and one end of the tightening rod abuts against the support rod.

[0008] Further preferably, a sleeve plate is disposed on the hollow screw rod between the second channel steel and the nut.

[0009] Further preferably, a fixing groove cooperating with the second channel steel is formed on the sleeve plate, and a first spring is disposed on the side of the second channel steel close to the sleeve plate.

[0010] Further preferably, a plurality of clamping grooves are formed on the side of the sleeve plate close to the support baffle, and the clamping grooves are correspondingly matched with the clamping blocks.

[0011] Further preferably, a support plate is connected to the side of the support block far from the support rod.

[0012] The present invention also discloses a using method of an adjustable support device for a foundation pit, including the following steps:

[0013] S1. Rotate the nut towards the first channel steel to make it horizontally move on the hollow screw rod until the nut no longer contacts the tightening rod and the sleeve plate. The round plate vertically moves outwards under the elastic force of the second spring and drives the tightening rod to move outwards, so as to release the fixation of the support rod.

[0014] S2. The sleeve plate horizontally moves under the elastic force of the first spring, so that the clamping groove is separated from the clamping block, thereby releasing the braking state of the slider. Then, push the support rod towards the support baffle, and the support rod drives the support block to move to adjust the extending distance.

[0015] S3. After the adjustment is completed, tighten the nut again so that the sleeve plate presses against the second channel steel and the support baffle, insert the clamping block into the clamping groove, and at the same time, multiple pressing rods enter the installation groove to press against the support rod.

[0016] Compared with the prior art, the present invention can achieve the following technical effects:

[0017] An adjustable support device for a foundation pit of the present invention, by using the cooperation between the tensioning unit and the adjusting unit, realizes the length adjustment of the support rod while ensuring the overall structural stability of the device to adapt to different working conditions; moreover, the connection between the structures is flexible, the disassembly and assembly are convenient, effectively reducing the work difficulty and improving the construction efficiency, and having good use and popularization value. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0019] Figure 1 It is a left view structural schematic diagram of the present invention;

[0020] Figure 2 It is a right view structural schematic diagram of the present invention;

[0021] Figure 3 It is a structural schematic diagram of the tensioning unit in the present invention;

[0022] Figure 4 It is a structural schematic diagram of the tensioning member in the present invention;

[0023] Figure 5 It is a structural schematic diagram of the adjusting unit in the present invention;

[0024] Figure 6 It is a structural schematic diagram of the sleeve plate in the present invention;

[0025] Figure 7 It is a structural schematic diagram of the pressing member in the present invention;

[0026] In the figure: 1, support plate; 2, support block; 21, chute; 22, first mounting seat; 23, rotating plate; 24, second mounting seat; 25, slider; 26, clamping block; 3, support baffle; 31, rectangular hole; 4, sleeve plate; 41, clamping groove; 42, fixed groove; 5, first channel steel; 6, support rod; 7, nut; 8, hollow screw; 81, installation groove; 82, pressing rod; 83, round plate; 84, second spring; 9, second channel steel; 91, first spring. EMBODIMENTS

[0027] In order to make the objectives, technical solutions and advantages of the present invention more clear and understandable, the present invention will be further described in detail below in conjunction with embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0028] The application principle of the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments. Embodiment

[0029] As Figure 1-2 shown, an adjustable support device for a foundation pit mainly consists of a support block 2, a baffle 3, a support rod 6, a tensioning unit for fixedly connecting the support block 2 and the baffle 3, and an adjusting unit provided on the support rod 6;

[0030] Among them, the support block 2 vertically penetrates the baffle 3, and a support plate 1 is fixedly connected to the side of the support block 2 away from the baffle 3, and the support rod 6 is fixedly connected to one end of the support block 2 close to the baffle 3. This support device uses the cooperation between the tensioning unit and the adjusting unit to adjust the length of the support rod while ensuring the overall structural stability of the device to meet the needs of different working conditions; moreover, the connections between the structures are flexible, easy to disassemble and assemble, effectively reducing the work difficulty and improving the construction efficiency.

[0031] As Figure 3 shown, the tensioning unit consists of a plurality of corresponding and cooperating chutes 21, rectangular holes 31 and tensioning members. The chutes 21 are located on the side of the support block 2 and are opened along the length direction of the support block 2. The rectangular holes 31 are located on the baffle 3 and are arranged circumferentially along the support block 2 at the center position of the baffle 3 and correspond to the chutes 21 one by one. The tensioning members are installed in the chutes 21 and the rectangular holes 31. As Figure 4 shown, the tensioning member consists of a first mounting seat 22, a rotating plate 23, a second mounting seat 24, a slider 25 and a clamping block 26. The first mounting seat 22 and the second mounting seat 24 are respectively slidably connected in the chutes 21 and the rectangular holes 31. At the same time, the free ends of the first mounting seat 22 and the second mounting seat 24 are connected as a whole through the rotating plate 23, and both are rotatably connected to the rotating plate 23. One end of the slider 25 is fixedly connected to the second mounting seat 24, and the other end is fixedly connected to the clamping block 26.

[0032] During the movement of the support block 2, it will drive the first mounting seat 22 to move horizontally, thereby driving the rotating plate 23 to rotate, and then driving the second mounting seat 24 and the slider 25 to move vertically downward to achieve adjustment.

[0033] As Figure 5-6As shown in the figure, the adjusting unit includes a hollow screw rod 8 mounted on the support rod 6, a first channel steel 5 and a second channel steel 9 respectively vertically arranged at both ends of the hollow screw rod 8, a nut 7 sleeved on the hollow screw rod 8, and a sleeve plate 4 on the hollow screw rod 8 between the second channel steel 9 and the nut 7. One end of the second channel steel 9 far from the hollow screw rod 8 is fixedly connected to the support baffle 3. A fixing groove 42 matching the second channel steel 9 is provided on the sleeve plate 4, and a circular through hole matching the support rod 6 is provided at the center of the fixing groove 42. A first spring 91 is provided on one side of the second channel steel 9 close to the sleeve plate 4. At the same time, a plurality of card slots 41 are provided on one side of the sleeve plate 4 close to the support baffle 3, and the card slots 41 are correspondingly matched with the clamping blocks 26 on the tensioning member.

[0034] In the initial state, the nut 7 abuts against the sleeve plate 4, the second channel steel 9 is located in the fixing groove 42 of the sleeve plate 4, the first spring 91 is in a compressed state, and the clamping block 26 is engaged with the card slot 41 to fix the tensioning member. When the nut 7 no longer abuts against the sleeve plate 4, the sleeve plate 4 will move horizontally under the elastic force of the first spring 91, so that the card slot 41 on the sleeve plate 4 no longer catches the clamping block 26, thereby releasing the fixation of the sliding block 25. Then, the support rod 6 is pushed horizontally, so that it drives the support block 2 to move horizontally, and the extended distance can be freely adjusted as needed.

[0035] As Figure 7 As shown in the figure, a plurality of mounting grooves 81 are provided on one side of the hollow screw rod 8 far from the support rod 6. The plurality of mounting grooves 81 are annularly distributed. A tightening member matching the mounting grooves 81 is provided in the mounting grooves 81. The tightening member is composed of a tightening rod 82, a round plate 83 sleeved on the tightening rod 82, and a second spring 84, and one end of the tightening rod 82 abuts against the support rod 6.

[0036] When it is necessary to adjust the extended length of the support rod 6, the nut 7 is rotated in the direction of the first channel steel 5, so that the nut 7 moves horizontally on the hollow screw rod 8 until the nut 7 no longer presses on the plurality of tightening rods 82. The round plate 83 moves vertically outwards under the elastic force of the second spring 84, and drives the tightening rod 82 to move outwards, releasing the fixation of the support rod 6.

[0037] A using method of an adjustable support device for a foundation pit is as follows:

[0038] S1. Rotate the nut 7 in the direction of the first channel steel 5 to make it move horizontally on the hollow screw rod 8 until the nut 7 no longer contacts the tightening rod 82 and the sleeve plate 4. The round plate 83 moves vertically outwards under the elastic force of the second spring 84, and drives the tightening rod 82 to move outwards, thereby releasing the fixation of the support rod 6;

[0039] S2. The template 4 moves horizontally under the elastic force of the first spring 91, so that the clamping groove 41 is separated from the clamping block 26, thereby releasing the braking state of the slider 24, and then the support rod 6 is pushed towards the support baffle 3. The support rod 6 drives the support block 2 to move and adjust the protruding distance.

[0040] S3. After the adjustment is completed, the nut 7 is tightened again, so that the template 4 presses against the second channel steel 8 and the support baffle 3, the clamping block 26 is inserted into the clamping groove 41, and at the same time, a plurality of abutting rods 82 enter the installation groove 81 to abut against the support rod 6.

Claims

1. An adjustable support device for a foundation pit, characterized in that: It includes a support baffle (3), a support block (2) vertically penetrating the support baffle (3), a support rod (6) connected to one end of the support block (2) close to the support baffle (3), a tensioning unit for fixedly connecting the support block (2) and the support baffle (3), and an adjusting unit provided on the support rod (6); The tensioning unit includes a plurality of sliding grooves (21) opened on the side of the support block (2), a plurality of rectangular holes (31) opened on the side of the support baffle (3) close to the support block (2) and cooperating with the sliding grooves (21), and a tensioning member provided in the sliding grooves (21) and the rectangular holes (31). The tensioning member includes a rotating plate (23), a first mounting seat (22) and a slider (25) respectively slidably connected in the sliding grooves (21) and the rectangular holes (31). Both ends of the slider (25) are respectively connected with a second mounting seat (24) and a clamping block (26). The first mounting seat (22) and the second mounting seat (24) are both rotatably connected with the rotating plate (23).

2. The adjustable support device for foundation pits according to claim 1, characterized in that: The adjusting unit includes a hollow screw rod (8) mounted on the support rod (6), and a first channel steel (5) and a second channel steel (9) respectively vertically arranged at both ends of the hollow screw rod (8). A nut (7) is sleeved on the hollow screw rod (8). One end of the second channel steel (9) far from the hollow screw rod (8) is fixedly connected with the support baffle (3).

3. An adjustable support device for a foundation pit according to claim 2, characterized in that: A plurality of mounting grooves (81) are opened on the side of the hollow screw rod (8) far from the support rod (6). The plurality of mounting grooves (81) are annularly distributed.

4. An adjustable support device for a foundation pit according to claim 3, characterized in that: A tightening member matching with the mounting groove (81) is arranged in the mounting groove (81). The tightening member includes a tightening rod (82), a round plate (83) and a second spring (84) sleeved on the tightening rod (82). One end of the tightening rod (82) abuts against the support rod (6).

5. An adjustable support device for a foundation pit according to claim 4, characterized in that: A sleeve plate (4) is arranged on the hollow screw rod (8) between the second channel steel (9) and the nut (7).

6. The adjustable support device for foundation pits according to claim 5, characterized in that: A fixing groove (42) matching with the second channel steel (9) is opened on the sleeve plate (4). A first spring (91) is arranged on the side of the second channel steel (9) close to the sleeve plate (4).

7. An adjustable support device for a foundation pit according to claim 5 or 6, characterized in that: A plurality of clamping grooves (41) are opened on the side of the sleeve plate (4) close to the support baffle (3). The clamping grooves (41) are correspondingly matched with the clamping blocks (26).

8. The adjustable support device for foundation pit according to claim 1, wherein: A support plate (1) is connected to the side of the support block (2) far from the support rod (6).

9. A method for using the adjustable support device for foundation pits according to claim 6, characterized in that, It includes the following steps: S1. Rotate the nut (7) towards the first channel steel (5) to make it move horizontally on the hollow screw rod (8) until the nut (7) no longer contacts the tightening rod (82) and the sleeve plate (4). The round plate (83) moves vertically outwards under the elastic force of the second spring (84) and drives the tightening rod (82) to move outwards, so as to release the fixation of the support rod (6); S2. The sleeve plate (4) moves horizontally under the elastic force of the first spring (91) to separate the clamping grooves (41) from the clamping blocks (26), so as to release the braking state of the slider (25). Then push the support rod (6) towards the support baffle (3). The support rod (6) drives the support block (2) to move and adjust the extending distance; S3. After the adjustment is completed, tighten the nut (7) again so that the sleeve plate (4) presses against the second channel steel (9) and the support baffle (3), insert the clamping block (26) into the card slot (41), and at the same time, a plurality of pressing rods (82) enter the installation groove (81) to press against the support rod (6).

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