Fabricated foundation pit supporting structure and supporting method thereof

Abstract

The invention discloses an assembly type foundation pit supporting structure and a supporting method thereof, and relates to the technical field of foundation pit supporting, the assembly type foundation pit supporting structure comprises a bottom plate, supporting mechanisms are arranged on the two sides of the top surface of the bottom plate, inserting rods are fixedly connected to the four corners of the bottom surface of the bottom plate, and positioning mechanisms are uniformly arranged on the bottom surface of the bottom plate; the positioning mechanism comprises a positioning box fixedly connected to the bottom face of the bottom plate, and a guide rod is fixedly connected to the top end of an inner cavity of the positioning box. Inserting rods are inserted into a foundation pit to preliminarily position a bottom plate, then electric telescopic rods shrink to drive sliding blocks to move, the two sliding blocks drive linkage rods to move when sliding on the surfaces of guide rods, the linkage rods drive pressing plates to move downwards, the pressing plates drive inserting strips to move downwards to be inserted into the foundation pit, spines are evenly arranged on the surfaces of the inserting strips, and the inserting stability is improved; and therefore, the position of the bottom plate is stabilized, the situation that the bottom of the supporting structure is not fixed and is prone to sliding and shifting during supporting is avoided, and the supporting stability is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of foundation pit support, and in particular to an assembled foundation pit support structure and a support method thereof. Background Art

[0002] The foundation pit is an earth pit excavated at the foundation design location according to the base elevation and foundation plane dimensions. Before excavation, the excavation plan should be determined based on geological and hydrological data and the conditions of nearby buildings on site, and waterproofing and drainage work should be done. The foundation pit is a temporary project. Its function is to provide a space so that the foundation masonry work can be carried out at the location specified in the design. In order to avoid collapse of the foundation pit during construction, supports are generally set up around the foundation pit to support the area around the foundation pit.

[0003] Patent publication number CN117626995A discloses an assembled foundation pit support structure and a support method thereof, including a supporting plate, an abutment assembly and a support assembly, wherein an abutment assembly is provided on one side of the supporting plate, and a support assembly is provided on the other side of the supporting plate; the abutment assembly is used to support the side wall of the foundation pit, and the abutment assembly includes a protective shell, a first docking seat and a second docking seat, the protective shell is fixed on one side of the supporting plate, and an installation cavity is provided in the protective shell.

[0004] In order to solve the problem of the gap between the support structure and the foundation pit, the existing technology adopts a method of supporting the side wall of the foundation pit by using an abutment component so that the abutment component can be tightly attached to the side wall of the foundation pit. However, the bottom of the support structure is not fixed and is prone to sliding and deflecting during support, which leads to the problem of low stability of the support. Summary of the invention

[0005] The object of the present invention is to provide a prefabricated foundation pit support structure and a support method thereof to solve the problems raised in the above-mentioned background technology.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0007] In a first aspect, the present invention provides an assembled foundation pit support structure, comprising a bottom plate, support mechanisms are arranged on both sides of the top surface of the bottom plate, plug rods are fixedly connected to the four corners of the bottom surface of the bottom plate, and positioning mechanisms are evenly arranged on the bottom surface of the bottom plate.

[0008] The positioning mechanism includes a positioning box fixedly connected to the bottom surface of the base plate, a guide rod fixedly connected to the top of the inner cavity of the positioning box, sliders movably connected at both ends of the guide rod, a linkage rod movably connected to the bottom surface of the slider, a pressure plate movably connected to the bottom end of the linkage rod, a cutting strip fixedly connected to the bottom surface of the pressure plate, spikes fixedly connected to the surface of the cutting strip, the spikes are evenly distributed on the surface of the cutting strip, there are two sliders, and an electric telescopic rod is fixedly connected between the two sliders.

[0009] A further improvement of the technical solution of the present invention is that the supporting mechanism includes a limiting plate fixedly connected to the top surface of the bottom plate, the side of the limiting plate is fixedly connected to a rotating shaft, the surface of the rotating shaft is rotatably connected to a swinging plate, the inner cavity of the swinging plate is movably sleeved with an adjusting plate, one end of the adjusting plate is rotatably connected to a straight rod, both ends of the straight rod are fixedly connected to a connecting plate, one side of the connecting plate is fixedly connected to a supporting plate, and a buffer mechanism is provided on the surface of the supporting plate.

[0010] A further improvement of the technical solution of the present invention is that a fixed block is fixedly connected to the surface of the swing plate, and a clamping groove is opened on the surface of the adjustment plate, and the clamping grooves are evenly distributed on the surface of the adjustment plate.

[0011] A further improvement of the technical solution of the present invention is that a movable plate is movably sleeved in the inner cavity of the fixed block, a clamping plate is fixedly connected to the bottom surface of the movable plate, and the bottom end of the clamping plate extends to the inside of the swing plate and is clamped in the clamping slot.

[0012] A further improvement of the technical solution of the present invention is that a pull rod is fixedly connected to the middle of the top surface of the movable plate, the top end of the pull rod extends to the top of the fixed block and is fixedly connected to the pull block, elastic parts are fixedly connected to both sides of the top surface of the movable plate, and the top end of the elastic part is fixedly connected to the top surface of the inner cavity of the fixed block.

[0013] A further improvement of the technical solution of the present invention is that the buffer mechanism includes a rubber pad fixedly connected to the side of the support plate, the inner cavity of the rubber pad is fixedly connected with an elastic sheet and an elastic airbag, the elastic sheet and the elastic airbag are alternately arranged inside the rubber pad, and the side of the elastic sheet is fixedly connected with an arc spring sheet.

[0014] In a second aspect, the present invention provides an assembled foundation pit support method, the assembled foundation pit support method comprising the following steps:

[0015] Step 1: Place the bottom plate in the foundation pit, press the bottom plate to insert the insertion rod into the foundation pit for fixing, and start the electric telescopic rod at the same time. The electric telescopic rod contracts to drive the slider to move, and the two sliders drive the linkage rod to move. The linkage rod drives the pressure plate to move down, and the pressure plate drives the insertion strip to move down and insert into the foundation pit. The spikes on the surface of the insertion strip increase the stability of the insertion, thereby stabilizing the position of the bottom plate.

[0016] Step 2: According to the required support height, pull the pull block to drive the pull rod to move, the pull rod drives the moving plate to move, the moving plate compresses the elastic member to generate elastic force, at this time the moving adjustment plate retracts and contracts in the swing plate, the adjustment plate drives the support plate to move, and the support plate is pressed against the inner side of the foundation pit for support, after the adjustment is completed, release the pull block, the elastic member restores the elastic force to drive the card plate to be clamped into the corresponding position of the card slot for fixation;

[0017] Step three, when the support plate is supporting the foundation pit, the elastic force of the elastic sheet, arc spring sheet and elastic airbag is used to press the rubber pad against the surface of the foundation pit, thereby increasing the contact area between the support plate and the rubber pad and the foundation pit. After the support work is completed, the pull block is pulled to drive the movable plate to move, so that the card plate is separated from the card slot, and the support plate is lowered back to its original height. Then the electric telescopic rod is started to extend, so that the insertion strip and the spike move up and return to the positioning box, and the bottom plate is pulled out upward to separate the insertion rod from the foundation pit.

[0018] Due to the adoption of the above technical solution, the present invention has the following technical advances compared with the prior art:

[0019] 1. The present invention provides an assembled foundation pit support structure and a support method thereof, which adopts the cooperation of a positioning mechanism, a positioning box, a guide rod, a slider, an electric telescopic rod, a linkage rod, a pressure plate, an insertion strip, spikes, an insertion rod, and a bottom plate. The bottom plate is initially positioned by inserting the insertion rod into the foundation pit, and then the electric telescopic rod is contracted to drive the slider to move. When the two sliders slide on the surface of the guide rod, they drive the linkage rod to move. The linkage rod drives the pressure plate to move downward, and the pressure plate drives the insertion strip to move downward and insert into the foundation pit. Spikes are evenly arranged on the surface of the insertion strip to increase the stability of the insertion, thereby stabilizing the position of the bottom plate, avoiding the situation that the bottom of the support structure is not fixed and is easy to slide and deviate during support, thereby improving the stability of the support.

[0020] 2. The present invention provides an assembled foundation pit support structure and a support method thereof, which adopts the cooperation of a support mechanism, a limit plate, a rotating shaft, a swing plate, an adjustment plate, a slot, a connecting plate, a support plate, a fixed block, a movable plate, a clamping plate, an elastic part, a pull rod and a pull block. The pull block is pulled to drive the pull rod to move, and the pull rod drives the movable plate to move. The movable plate compresses the elastic part and drives the clamping plate to move. At this time, the movable adjustment plate retracts and contracts in the swing plate, and the adjustment plate drives the support plate to move to adjust the support height. After the adjustment is completed, the pull block is released, and the elastic part restores the elastic force to drive the clamping plate to be clamped into the slot at the corresponding position for fixation. The rotating shaft cooperates with the limit plate to enable the swing plate to rotate to adjust the support angle, thereby improving the adaptability of the support structure.

[0021] 3. The present invention provides an assembled foundation pit support structure and a support method thereof, which adopts the cooperation of a buffer mechanism, a rubber pad, an elastic sheet, an arc spring sheet, and an elastic air bag. By arranging a rubber pad on the surface of a support plate, when the support plate supports the foundation pit, the rubber pad is deformed due to the depressions of the foundation pit, and the rubber pad squeezes the elastic air bag and the elastic sheet. The elastic sheet squeezes the arc spring sheet to generate elastic force. The elastic force of the elastic sheet, the arc spring sheet and the elastic air bag is utilized to press the rubber pad against the surface of the foundation pit, thereby increasing the contact area between the support plate and the rubber pad and the foundation pit, and improving the stability of the support. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0023] Figure 2 It is a bottom view structural schematic diagram of the present invention;

[0024] Figure 3 It is a structural schematic diagram of the positioning mechanism of the present invention;

[0025] Figure 4 It is a structural schematic diagram of the support mechanism of the present invention;

[0026] Figure 5 It is a schematic diagram of the cross-sectional structure of the fixing block of the present invention;

[0027] Figure 6 It is a structural schematic diagram of the buffer mechanism of the present invention.

[0028] In the figure: 1. bottom plate; 2. plug rod; 3. positioning mechanism; 31. positioning box; 32. guide rod; 33. slider; 34. electric telescopic rod; 35. linkage rod; 36. pressure plate; 37. plug strip; 38. spike; 4. support mechanism; 41. limit plate; 42. rotating shaft; 43. swing plate; 44. adjustment plate; 45. card slot; 46. connecting plate; 47. support plate; 48. buffer mechanism; 481. rubber pad; 482. elastic sheet; 483. arc spring sheet; 484. elastic airbag; 49. fixed block; 491. movable plate; 492. card plate; 493. elastic member; 494. pull rod; 495. pull block. DETAILED DESCRIPTION

[0029] The present invention is further described in detail below in conjunction with embodiments:

[0030] Example 1

[0031] First, as Figure 1-6As shown, the present invention provides an assembled foundation pit support structure, including a bottom plate 1, support mechanisms 4 are arranged on both sides of the top surface of the bottom plate 1, plug rods 2 are fixedly connected to the four corners of the bottom surface of the bottom plate 1, and positioning mechanisms 3 are evenly arranged on the bottom surface of the bottom plate 1. The positioning mechanism 3 includes a positioning box 31 fixedly connected to the bottom surface of the bottom plate 1, a guide rod 32 is fixedly connected to the top of the inner cavity of the positioning box 31, and sliders 33 are movably sleeved at both ends of the guide rod 32. The bottom surface of the slider 33 is movably connected to a linkage rod 35, and the bottom end of the linkage rod 35 is movably connected to a pressure plate 36. The bottom surface of the pressure plate 36 is fixedly connected to an insertion strip 37, and the insertion strip The surface of 37 is fixedly connected with spikes 38, and the spikes 38 are evenly distributed on the surface of the insertion strip 37. There are two sliders 33, and an electric telescopic rod 34 is fixedly connected between the two sliders 33. The bottom plate 1 is initially positioned by inserting the insertion rod 2 into the foundation pit, and then the electric telescopic rod 34 is contracted to drive the slider 33 to move. When the two sliders 33 slide on the surface of the guide rod 32, they drive the linkage rod 35 to move, and the linkage rod 35 drives the pressure plate 36 to move downward, and the pressure plate 36 drives the insertion strip 37 to move downward and insert into the foundation pit. Spikes 38 are evenly arranged on the surface of the insertion strip 37 to increase the stability of the insertion, thereby stabilizing the position of the bottom plate 1.

[0032] Example 2

[0033] like Figure 1-6As shown, on the basis of Example 1, the present invention provides a technical solution: preferably, the supporting mechanism 4 includes a limiting plate 41 fixedly connected to the top surface of the bottom plate 1, a rotating shaft 42 is fixedly connected to the side of the limiting plate 41, a swinging plate 43 is rotatably connected to the surface of the rotating shaft 42, an adjusting plate 44 is movably sleeved in the inner cavity of the swinging plate 43, one end of the adjusting plate 44 is rotatably connected to a straight rod, both ends of the straight rod are fixedly connected to a connecting plate 46, one side of the connecting plate 46 is fixedly connected to a supporting plate 47, a buffer mechanism 48 is provided on the surface of the supporting plate 47, a fixing block 49 is fixedly connected to the surface of the swinging plate 43, a card slot 45 is provided on the surface of the adjusting plate 44, and the card slots 45 are evenly distributed on the surface of the adjusting plate 44, a moving plate 491 is movably sleeved in the inner cavity of the fixing block 49, a card plate 492 is fixedly connected to the bottom surface of the moving plate 491, and the bottom end of the card plate 492 extends to the inside of the swinging plate 43 and is locked with the card slot 45 Then, a pull rod 494 is fixedly connected to the middle part of the top surface of the movable plate 491, and the top end of the pull rod 494 extends to the top of the fixed block 49 and is fixedly connected to a pull block 495. Elastic parts 493 are fixedly connected to both sides of the top surface of the movable plate 491, and the top end of the elastic part 493 is fixedly connected to the top surface of the inner cavity of the fixed block 49. The pull rod 494 is driven to move by pulling the pull block 495, and the pull rod 494 drives the movable plate 491 to move. The movable plate 491 compresses the elastic part 493 and drives the clamping plate 492 to move. At this time, the movable adjustment plate 44 retracts and contracts in the swing plate 43, and the adjustment plate 44 drives the support plate 47 to move to adjust the support height. After the adjustment is completed, the pull block 495 is released, and the elastic part 493 restores the elastic force to drive the clamping plate 492 to be clamped into the corresponding position of the slot 45 for fixation. The rotating shaft 42 cooperates with the limiting plate 41 to enable the swing plate 43 to rotate to adjust the support angle, thereby improving the adaptability of the support structure.

[0034] Example 3

[0035] like Figure 1-6 As shown, on the basis of Example 1, the present invention provides a technical solution: preferably, the buffer mechanism 48 includes a rubber pad 481 fixedly connected to the side of the support plate 47, the inner cavity of the rubber pad 481 is fixedly connected with an elastic sheet 482 and an elastic air bag 484, the elastic sheet 482 and the elastic air bag 484 are alternately arranged inside the rubber pad 481, and the side of the elastic sheet 482 is fixedly connected with an arc spring piece 483. By arranging the rubber pad 481 on the surface of the support plate 47, when the support plate 47 supports the foundation pit, the rubber pad 481 is deformed due to the pits of the foundation pit, the rubber pad 481 squeezes the elastic air bag 484 and the elastic sheet 482, and the elastic sheet 482 squeezes the arc spring piece 483 to generate elastic force, and the elastic force of the elastic sheet 482, the arc spring piece 483 and the elastic air bag 484 is used to press the rubber pad 481 against the surface of the foundation pit, thereby increasing the contact area between the support plate 47 and the rubber pad 481 and the foundation pit, and improving the stability of the support.

[0036] In a second aspect, the present invention further provides an assembled foundation pit support method, the assembled foundation pit support method comprising the following steps:

[0037] Step 1: Place the bottom plate 1 in the foundation pit, press the bottom plate 1 so that the insertion rod 2 is inserted into the foundation pit for fixing, and start the electric telescopic rod 34 at the same time. The electric telescopic rod 34 contracts and drives the slider 33 to move. The two sliders 33 drive the linkage rod 35 to move. The linkage rod 35 drives the pressure plate 36 to move downward. The pressure plate 36 drives the insertion strip 37 to move downward and insert into the foundation pit. The spikes 38 on the surface of the insertion strip 37 increase the stability of the insertion, thereby stabilizing the position of the bottom plate 1.

[0038] Step 2: According to the required support height, pull the pull block 495 to drive the pull rod 494 to move, and the pull rod 494 drives the moving plate 491 to move. The moving plate 491 compresses the elastic member 493 to generate elastic force. At this time, the moving adjustment plate 44 is extended and retracted in the swing plate 43, and the adjustment plate 44 drives the support plate 47 to move, and the support plate 47 is pressed against the inner side of the foundation pit for support. After the adjustment is completed, release the pull block 495, and the elastic member 493 restores the elastic force to drive the card plate 492 to be clamped into the corresponding position of the card slot 45 for fixation;

[0039] Step three, when the support plate 47 supports the foundation pit, the elastic force of the elastic sheet 482, the arc spring sheet 483 and the elastic airbag 484 is used to press the rubber pad 481 against the surface of the foundation pit, thereby increasing the contact area between the support plate 47 and the rubber pad 481 and the foundation pit. After the supporting work is completed, the pull block 495 is pulled to drive the movable plate 491 to move, so that the card plate 492 is separated from the card slot 45, and the support plate 47 is lowered back to its original height, and then the electric telescopic rod 34 is started to extend, so that the insertion strip 37 and the spike 38 move up and return to the positioning box 31, and the bottom plate 1 is pulled out upward to separate the insertion rod 2 from the foundation pit.

[0040] The above generally describes the present invention in detail, but it is obvious to a person skilled in the art that some modifications or improvements can be made to the present invention. Therefore, modifications or improvements that do not depart from the spirit of the present invention are within the scope of protection of the present invention.

Claims

1. An assembled foundation pit support structure, comprising a bottom plate (1), characterized in that: Support mechanisms (4) are provided on both sides of the top surface of the bottom plate (1), plugging rods (2) are fixedly connected to the four corners of the bottom surface of the bottom plate (1), and positioning mechanisms (3) are evenly provided on the bottom surface of the bottom plate (1); The positioning mechanism (3) comprises a positioning box (31) fixedly connected to the bottom surface of the base plate (1); a guide rod (32) is fixedly connected to the top of the inner cavity of the positioning box (31); sliders (33) are movably sleeved at both ends of the guide rod (32); a linkage rod (35) is movably connected to the bottom surface of the slider (33); a pressure plate (36) is movably connected to the bottom end of the linkage rod (35); a plug strip (37) is fixedly connected to the bottom surface of the pressure plate (36); spikes (38) are fixedly connected to the surface of the plug strip (37); the spikes (38) are evenly distributed on the surface of the plug strip (37); there are two sliders (33); an electric telescopic rod (34) is fixedly connected between the two sliders (33).

2. The assembled foundation pit support structure according to claim 1 is characterized in that: The support mechanism (4) comprises a limit plate (41) fixedly connected to the top surface of the bottom plate (1); a rotating shaft (42) is fixedly connected to the side surface of the limit plate (41); a swing plate (43) is rotatably connected to the surface of the rotating shaft (42); an adjustment plate (44) is movably sleeved in the inner cavity of the swing plate (43); one end of the adjustment plate (44) is rotatably connected to a straight rod; both ends of the straight rod are fixedly connected to a connecting plate (46); one side of the connecting plate (46) is fixedly connected to a support plate (47); and a buffer mechanism (48) is provided on the surface of the support plate (47).

3. The assembled foundation pit support structure according to claim 2 is characterized in that: A fixed block (49) is fixedly connected to the surface of the swing plate (43), and a clamping groove (45) is provided on the surface of the adjustment plate (44). The clamping grooves (45) are evenly distributed on the surface of the adjustment plate (44).

4. The assembled foundation pit support structure according to claim 3 is characterized in that: The inner cavity of the fixed block (49) is movably sleeved with a movable plate (491), the bottom surface of the movable plate (491) is fixedly connected with a clamping plate (492), and the bottom end of the clamping plate (492) extends to the interior of the swing plate (43) and is clamped with the clamping slot (45).

5. The assembled foundation pit support structure according to claim 4 is characterized in that: A pull rod (494) is fixedly connected to the middle of the top surface of the movable plate (491), the top end of the pull rod (494) extends to the top of the fixed block (49) and is fixedly connected to the pull block (495), and elastic members (493) are fixedly connected to both sides of the top surface of the movable plate (491), and the top end of the elastic member (493) is fixedly connected to the top surface of the inner cavity of the fixed block (49).

6. The assembled foundation pit support structure according to claim 2, characterized in that: The buffer mechanism (48) comprises a rubber pad (481) fixedly connected to the side of the support plate (47); an elastic sheet (482) and an elastic airbag (484) are fixedly connected to the inner cavity of the rubber pad (481); the elastic sheet (482) and the elastic airbag (484) are alternately arranged inside the rubber pad (481); and an arc spring sheet (483) is fixedly connected to the side of the elastic sheet (482).

7. An assembled foundation pit support method, implemented based on an assembled foundation pit support structure according to any one of claims 1 to 6, characterized in that: The assembled foundation pit supporting method comprises the following steps: Step 1: Place the bottom plate (1) in the foundation pit, press the bottom plate (1) so that the insertion rod (2) is inserted into the foundation pit for fixing, and at the same time, start the electric telescopic rod (34), the electric telescopic rod (34) contracts to drive the slider (33) to move, the two sliders (33) drive the linkage rod (35) to move, the linkage rod (35) drives the pressure plate (36) to move downward, the pressure plate (36) drives the insertion strip (37) to move downward and insert into the foundation pit, the spikes (38) on the surface of the insertion strip (37) increase the stability of the insertion, thereby stabilizing the position of the bottom plate (1); Step 2: according to the required support height, pull the pull block (495) to drive the pull rod (494) to move, the pull rod (494) drives the movable plate (491) to move, the movable plate (491) compresses the elastic member (493) to generate elastic force, at this time, the movable adjustment plate (44) retracts and contracts in the swing plate (43), the adjustment plate (44) drives the support plate (47) to move, and the support plate (47) is pressed against the inner side of the foundation pit for support, and the pull block (495) is released after the adjustment is completed, and the elastic member (493) restores the elastic force to drive the card plate (492) to be clamped into the corresponding position of the card slot (45) for fixation; Step 3: When the support plate (47) supports the foundation pit, the elastic force of the elastic sheet (482), the arc spring sheet (483) and the elastic airbag (484) is used to press the rubber pad (481) against the surface of the foundation pit, thereby increasing the contact area between the support plate (47) and the rubber pad (481) and the foundation pit. After the support work is completed, the pull block (495) is pulled to drive the movable plate (491) to move, so that the card plate (492) is separated from the card slot (45), and the support plate (47) is lowered back to the original height. Then, the electric telescopic rod (34) is started to extend, so that the insertion strip (37) and the spike (38) move up and return to the positioning box (31), and the bottom plate (1) is pulled out upward to separate the insertion rod (2) from the foundation pit.

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