Combined device for building foundation pit supporting

Abstract

The invention relates to the technical field of foundation pit supporting, and particularly discloses a combined device for building foundation pit supporting, which comprises two groups of guard plate mechanisms and a base mechanism arranged between the two groups of guard plate mechanisms, and a supporting mechanism is arranged at the top of the base mechanism; the base mechanism comprises a base. The two sides of the base are each connected with two sets of length-adjustable adjusting rod pieces. The protection plate mechanism comprises a protection plate connected with the adjusting rod piece, and one side of the protection plate is connected with an inclined supporting mechanism used for supporting the protection plate. The protection plate can be attached to the side wall of the foundation pit, meanwhile, the adjusting rod piece is adjusted to the target length to be fixed, the adjusting rod piece can support the bottom of the protection plate, the inclined supporting mechanism can be used for supporting the protection plate, then the mounting box is rotated, the pressing plates can correspond to the protection plate, and under cooperation of the four pressing plates, the protection plate is stably supported; and under the cooperation of the adjusting rod piece, the inclined strut mechanism and the pressing plate, the protection plate can be stably supported, and the foundation pit is stably supported by the protection plate.

Description

Technical Field

[0001] The invention relates to the technical field of foundation pit support, in particular to a combined device for building foundation pit support. Background Art

[0002] The construction foundation pit refers to the space excavated from the ground for the construction of underground structures of buildings. Foundation pit support refers to the temporary support and reinforcement of the foundation pit to protect the safety of the underground main structure construction and the surrounding environment of the foundation pit, and the support, reinforcement and protection of the side walls of the foundation pit and the surrounding environment to prevent the collapse and sliding of soil, rocks, etc. The equipment used for foundation pit support is usually easy to disassemble and assemble, which is conducive to on-site adjustment.

[0003] The existing patent announcement number CN115075255B discloses a combined device for supporting a construction foundation pit, which includes a transport vehicle, a guard plate and a support block; the transport vehicle is provided with a driving device, a push block is slidably connected to the transport vehicle, a slope adjustment device is installed at the front end of the push block, and the slope adjustment device is hinged to the guard plate through a docking device; the guard plate and the shovel plate are used to squeeze the soil on the side wall of the foundation pit, so that the soil on the side wall is more compact, and rainwater is not easy to enter the soil gap, thereby avoiding the phenomenon of guard plate landslide on rainy days due to loose soil, thereby ensuring stable protection of the foundation pit guard plate.

[0004] When the above device is used, it can support the foundation pit, but it needs to be driven by an electric motor during the support. It is inconvenient to lay multiple devices in the foundation pit, and the practicality of the above device when used in adjacent or opposite settings still needs to be improved. In view of the above problems, a combined device for supporting the construction foundation pit is proposed. Summary of the invention

[0005] The object of the present invention is to provide a combined device for supporting a building foundation pit to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A combined device for supporting a building foundation pit, comprising two sets of guard plate mechanisms and a base mechanism arranged between the two sets of guard plate mechanisms, wherein a support mechanism is arranged on the top of the base mechanism;

[0008] The base mechanism comprises a base, and two sets of adjustable rods with adjustable lengths are connected to both sides of the base;

[0009] The guard plate mechanism comprises a guard plate connected to the adjusting rod, and one side of the guard plate is connected to a diagonal support mechanism for supporting the guard plate;

[0010] The supporting mechanism includes an installation box arranged on the top of the base, a rotating mechanism for adjusting the horizontal rotation of the installation box is installed on the top of the base, moving rods are provided on both sides of the installation box, a fixed rod is provided in the moving rod, a pressing plate in contact with the guard plate is connected to the side of the fixed rod away from the installation box, a moving part for adjusting the horizontal movement of the moving rod is installed on the installation box, and a linkage part for adjusting the movement of the fixed rod is installed in the moving rod.

[0011] In an optional scheme: the adjusting rod includes a T-shaped extension rod A and a T-shaped extension rod B slidably connected to the T-shaped extension rod A, the base is provided with a T-shaped slot for slidably accommodating the T-shaped extension rod A, the base is provided with a fixing bolt A for fixing the sliding position of the T-shaped extension rod A, the T-shaped extension rod A is provided with a fixing bolt B for fixing the sliding position of the T-shaped extension rod B, and the base, T-shaped extension rod A and the bottom of the T-shaped extension rod B are located in the same horizontal plane.

[0012] In an optional solution: the diagonal support mechanism includes a telescopic rod, a hinge seat is installed on one side of the guard plate, one end of the telescopic rod is hinged to the hinge seat, the end of the telescopic rod away from the hinge seat is rotatably connected to a positioning plate, and a bolt hole is provided on the positioning plate.

[0013] In an optional scheme: a lifting plate is slidably arranged in the guard plate, a plurality of plug rods are connected to the bottom of the lifting plate, the bottom of the inner cavity of the guard plate is connected to the outside, a first screw rod is rotatably installed in the guard plate, a first screw hole is provided on the lifting plate which cooperates with the first screw rod thread, the top of the first screw rod is connected to the first driven bevel gear, one side of the guard plate is rotatably connected to the connecting shaft, the connecting shaft extends to the inner cavity of the guard plate and is connected to the first active bevel gear meshing with the first driven bevel gear, the connecting shaft is connected to the first turntable arranged on the outside of the guard plate at one end away from the first active bevel gear, and the first turntable is threadedly connected to the first positioning bolt at the eccentric part.

[0014] In an optional solution: the rotating mechanism includes a supporting tube and a rotating column that can rotate or slide in the supporting tube, the rotating column is connected to the inner wall of the mounting box, the side wall of the rotating column is connected to four groups of limit strips arranged in a circular array, and the supporting tube is provided with a limit groove corresponding to the limit strip.

[0015] In an optional scheme: the moving part includes a second screw rod, a moving cavity corresponding to the four groups of moving rods is provided in the installation box, a fixed plate is connected in the moving cavity, the second screw rod is rotatably installed on the fixed plate, a second screw hole corresponding to the second screw rod is provided on the moving rod, the two groups of second screw rods are connected to the second driven bevel gears at one end close to each other, and a driving part for driving the four groups of second driven bevel gears to rotate synchronously is installed on the installation box.

[0016] In an optional solution: the driving member includes a driving rod rotatably mounted on the mounting box, two sets of second active bevel gears are mounted on the driving rod, one set of second active bevel gears is meshed with two sets of second driven bevel gears, the driving rod extends to the outside of the mounting box and is fixedly connected to the second turntable, and the second turntable is threadedly connected to the second positioning bolt at the eccentric portion.

[0017] In an optional solution: the linkage member includes a gear, a mounting groove is provided on the moving rod, the gear is rotatably installed in the mounting groove, the inner wall of the moving cavity is fixedly connected to a rack A, the rack A is meshed with the gear, the fixed rod is slidably arranged in the moving rod, one side of the fixed rod is fixedly connected to a rack B, and the rack B is meshed with the gear.

[0018] In an optional solution, a plurality of grooves are provided on two sides away from each other of the two groups of guard plates.

[0019] In an optional solution: a side of the pressing plate away from the fixing rod is connected to an anti-slip pad.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] In the present invention, the guard plate can be attached to the side wall of the foundation pit, and the adjusting rod can be adjusted to the target length and fixed. The adjusting rod can support the bottom of the guard plate, and the diagonal support mechanism can be used to support the guard plate. Then, the installation box is rotated so that the pressing plate can correspond to the guard plate. The movable rod can be adjusted to move horizontally through the movable member. During the movement, the fixed rod is driven to move by the linkage member, so that the pressing plate can contact the guard plate. With the cooperation of the four groups of pressing plates, the guard plate can be stably supported. With the cooperation of the adjusting rod, the diagonal support mechanism and the pressing plate, the guard plate can be stably supported, so that the guard plate can stably support the foundation pit.

[0022] The arrangement of the device in the present invention facilitates the splicing and use of adjacent devices. A corresponding number of devices can be selected according to the size of the foundation pit. When adjacent devices are spliced, the guard plates can be stably abutted against each other, and the lifting plate inside the guard plate at the bottom can be lowered to allow the insertion rod to be inserted into the soil to fix the position of the guard plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of the present invention.

[0024] Figure 2 It is a structural schematic diagram of the diagonal bracing mechanism in the present invention.

[0025] Figure 3 It is a structural schematic diagram of the guard plate mechanism in the present invention.

[0026] Figure 4 It is a schematic diagram of the structure of the connecting parts on the base mechanism in the present invention.

[0027] Figure 5 It is a structural schematic diagram of the base mechanism in the present invention.

[0028] Figure 6 It is a structural schematic diagram of the supporting mechanism in the present invention.

[0029] Figure 7 It is a schematic cross-sectional structural diagram of the support mechanism in the present invention.

[0030] Figure 8 It is a schematic diagram of the partial structure of the supporting mechanism in the present invention.

[0031] Fig. 9 It is a schematic diagram of the structure when the present invention is used.

[0032] In the figure: 100, base mechanism; 101, base; 102, T-shaped extension rod A; 103, T-shaped extension rod B;

[0033] 200, guard plate mechanism; 201, guard plate; 202, lifting plate; 203, insertion rod; 204, first screw rod; 205, first driven bevel gear; 206, first driving bevel gear; 207, first rotating disk; 208, first positioning bolt;

[0034] 300, support mechanism; 301, mounting box; 302, moving rod; 303, fixing rod; 304, pressing plate; 305, moving cavity; 306, fixing plate; 307, second screw rod; 308, second driven bevel gear; 309, second driving bevel gear; 310, driving rod; 311, rack A; 312, mounting groove; 313, rack B; 314, gear;

[0035] 400, diagonal bracing mechanism; 401, hinged seat; 402, telescopic rod; 403, positioning plate;

[0036] 500, rotating mechanism; 501, supporting tube; 502, limiting groove; 503, rotating column; 504, limiting strip. DETAILED DESCRIPTION

[0037] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] See also Figure 1-Figure 9 In this embodiment, a combined device for supporting a construction foundation pit includes two sets of guard plate mechanisms 200 and a base mechanism 100 disposed between the two sets of guard plate mechanisms 200, and a support mechanism 300 is disposed on the top of the base mechanism 100;

[0040] The base mechanism 100 includes a base 101, and two sets of adjustable rods with adjustable lengths are connected to both sides of the base 101; the base mechanism 100 can be laid at the bottom of the foundation pit, and the guard plate mechanism 200 can be close to the side wall of the foundation pit;

[0041] The guard plate mechanism 200 includes a guard plate 201 connected to an adjusting rod, and a diagonal support mechanism 400 for supporting the guard plate 201 is connected to one side of the guard plate 201; the diagonal support mechanism 400 can improve the stability of the guard plate 201;

[0042] The support mechanism 300 includes an installation box 301 arranged on the top of the base 101, a rotating mechanism 500 for adjusting the horizontal rotation of the installation box 301 is installed on the top of the base 101, moving rods 302 are arranged on both sides of the installation box 301, a fixed rod 303 is arranged inside the moving rod 302, a pressing plate 304 in contact with the guard plate 201 is connected to the side of the fixed rod 303 away from the installation box 301, a moving part for adjusting the horizontal movement of the moving rod 302 is installed on the installation box 301, and a linkage part for adjusting the movement of the fixed rod 303 is installed inside the moving rod 302;

[0043] like Fig. 9 As shown, the guard plate 201 is moved to be close to the side wall of the foundation pit, and the rod is adjusted to the target length. The diagonal support mechanism 400 can be used to support the guard plate 201, and then the installation box 301 is rotated so that the pressing plate 304 can correspond to the guard plate 201. The movable rod 302 can be adjusted to move horizontally through the movable part. During the movement, the fixed rod 303 is driven to move by the linkage part, so that the pressing plate 304 can contact the guard plate 201. With the cooperation of four groups of pressing plates 304, the guard plate 201 is stably supported. According to the size of the foundation pit, the corresponding number of devices can be selected for splicing and use. The setting of the device does not affect the splicing of adjacent devices.

[0044] like Figure 4As shown, the adjusting rod comprises a T-shaped extension rod A102 and a T-shaped extension rod B103 slidably connected in the T-shaped extension rod A102, the base 101 is provided with a T-shaped slot for slidably accommodating the T-shaped extension rod A102, the base 101 is provided with a fixing bolt A for fixing the sliding position of the T-shaped extension rod A102, the T-shaped extension rod A102 is provided with a fixing bolt B for fixing the sliding position of the T-shaped extension rod B103, and the base 101, the T-shaped extension rod A102 and the bottom of the T-shaped extension rod B103 are located in the same horizontal plane;

[0045] When the guard plate 201 is adjusted to a horizontal position, the T-shaped extension rod A102 and the T-shaped extension rod B103 are slid and adjusted to adjust the length. Then, the fixing bolt A can be used to fix the sliding position of the T-shaped extension rod A102, and the fixing bolt B can be used to fix the sliding position of the T-shaped extension rod B103. After the adjustment rod is adjusted, the length is fixed, which can limit the movement of the bottom of the guard plate 201.

[0046] like Figure 2 As shown, the diagonal bracing mechanism 400 includes a telescopic rod 402, a hinge seat 401 is installed on one side of the guard plate 201, one end of the telescopic rod 402 is hinged to the hinge seat 401, and one end of the telescopic rod 402 away from the hinge seat 401 is rotatably connected to a positioning plate 403, and a bolt hole is provided on the positioning plate 403;

[0047] After the horizontal position of the guard plate 201 is adjusted, the length of the adjusting rod is fixed, and the positioning plate 403 can be fixed to the adjusting rod or the base 101 using bolts corresponding to the bolt holes.

[0048] like Figure 3 As shown, a lifting plate 202 is slidably arranged in the guard plate 201, and a plurality of plug rods 203 are connected to the bottom of the lifting plate 202. The bottom of the inner cavity of the guard plate 201 is communicated with the outside. A first screw rod 204 is rotatably installed in the guard plate 201. A first screw hole threadably matched with the first screw rod 204 is provided on the lifting plate 202. The top of the first screw rod 204 is connected to a first driven bevel gear 205. One side of the guard plate 201 is rotatably connected to a connecting shaft. The connecting shaft extends to the inner cavity of the guard plate 201 and is connected to a first active bevel gear 206 meshing with the first driven bevel gear 205. The end of the connecting shaft away from the first active bevel gear 206 is connected to a first rotating disk 207 arranged on the outer side of the guard plate 201. The first rotating disk 207 is threadedly connected to a first positioning bolt 208 at an eccentric portion.

[0049] Rotating the first rotating disk 207 can drive the first active bevel gear 206 to rotate, driving the first driven bevel gear 205 to rotate, thereby adjusting the rotation of the first screw rod 204 and adjusting the height of the lifting plate 202, so that the insertion rod 203 can be inserted into the soil to fix the position of the guard plate 201.

[0050] like Figure 5 and Figure 6 As shown, the rotating mechanism 500 includes a support tube 501 and a rotating column 503 that can rotate or slide in the support tube 501, the rotating column 503 is connected to the inner wall of the installation box 301, the side wall of the rotating column 503 is connected to four groups of limiting bars 504 arranged in a circular array, and the support tube 501 is provided with a limiting groove 502 corresponding to the limiting bar 504;

[0051] The rotating column 503 can rotate or slide up and down in the supporting tube 501 to adjust the horizontal angle of the installation box 301. Figure 1 and Fig. 9 As shown, it is convenient for the installation box 301 to switch positions for subsequent adjustment and fixation.

[0052] like Figure 7 As shown, the moving part includes a second screw rod 307, and a moving cavity 305 corresponding to the four groups of moving rods 302 is provided in the installation box 301. The moving cavity 305 is connected to a fixed plate 306, and the second screw rod 307 is rotatably installed on the fixed plate 306. The moving rod 302 is provided with a second screw hole corresponding to the second screw rod 307, and the two groups of second screw rods 307 are connected to the second driven bevel gear 308 at one end close to each other. A driving part for driving the four groups of second driven bevel gears 308 to rotate synchronously is installed on the installation box 301; the driving part drives the four groups of second driven bevel gears 308 to rotate synchronously, and the four groups of second screw rods 307 can rotate, thereby adjusting the four groups of moving rods 302 to move synchronously.

[0053] like Figure 7 As shown, the driving member includes a driving rod 310 rotatably mounted on the mounting box 301, two sets of second active bevel gears 309 are mounted on the driving rod 310, one set of second active bevel gears 309 is meshed with two sets of second driven bevel gears 308, the driving rod 310 extends to the outside of the mounting box 301 and is fixedly connected to the second turntable, and the second turntable is threadedly connected to the second positioning bolt at the eccentric part; the rotation of the second turntable can drive the driving rod 310 to rotate, and the second active bevel gear 309 can drive the second driven bevel gear 308 to rotate, and then the second positioning bolt is used to connect the mounting box 301 to fix the position of the second turntable.

[0054] like Figure 7 and Figure 8 As shown, the linkage member includes a gear 314, a mounting groove 312 is provided on the moving rod 302, the gear 314 is rotatably installed in the mounting groove 312, the inner wall of the moving cavity 305 is fixedly connected to a rack A311, the rack A311 is meshed with the gear 314, the fixed rod 303 is slidably arranged in the moving rod 302, one side of the fixed rod 303 is fixedly connected to a rack B313, the rack B313 is meshed with the gear 314;

[0055] When the movable rod 302 is moving, the gear 314 rotates under the action of the rack A311, thereby driving the rack B313 to move, adjusting the fixed rod 303 to slide outward, move in coordination with the movable rod 302, and adjust the position of the pressing plate 304.

[0056] like Figure 1 As shown, a plurality of grooves are provided on both sides of the two groups of guard plates 201 which are away from each other; the provision of the grooves facilitates the contact between the guard plates 201 and the soil on the side wall of the foundation pit.

[0057] like Figure 6 As shown, the side of the pressing plate 304 away from the fixing rod 303 is connected to an anti-skid pad; the anti-skid pad can play an anti-skid role.

[0058] The working principle of the present invention is: the guard plate 201 is moved to be close to the side wall of the foundation pit, and the T-shaped extension rod A102 and the T-shaped extension rod B103 are slidably adjusted to adjust the length. Then, the fixing bolt A can be used to fix the sliding position of the T-shaped extension rod A102, and the fixing bolt B can be used to fix the sliding position of the T-shaped extension rod B103. After the adjustment rod is adjusted, the length is fixed, which can limit the movement of the bottom of the guard plate 201. After the horizontal position of the guard plate 201 is adjusted, the length of the adjustment rod is fixed, and the bolts corresponding to the bolt holes can be used to fix the positioning plate 403 on the adjustment rod or the base 101, and then the installation box 301 is rotated to make the pressing plate 304 correspond to the guard plate 201, and the first rotating disk 207 can be rotated to drive the first active bevel gear 206 to rotate, and drive the first driven bevel gear 205 to rotate, thereby adjusting the first screw rod 204 to rotate, and adjusting the lifting plate 2 02, the insertion rod 203 can be inserted into the soil to fix the position of the guard plate 201, the rotation of the second turntable can drive the driving rod 310 to rotate, the second active bevel gear 309 can drive the second driven bevel gear 308 to rotate, and the four groups of second screw rods 307 can be rotated, so as to adjust the four groups of moving rods 302 to move synchronously. When the moving rod 302 is moving, the gear 314 rotates under the action of the rack A311, thereby driving the rack B313 to move, and adjusting the fixed rod 303 to slide outward and move in coordination with the moving rod 302 to adjust the position of the pressing plate 304. Then, the second positioning bolt is used to connect the installation box 301 to fix the position of the second turntable. With the cooperation of the four groups of pressing plates 304, the guard plate 201 can be stably supported. According to the size of the foundation pit, the corresponding number of devices can be selected for splicing and use. The setting of the device does not affect the splicing of adjacent devices.

[0059] The above description is only a preferred embodiment of the present invention and does not limit the present invention in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes and apply it to other fields. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A combined device for supporting a foundation pit, comprising two sets of guard plate mechanisms (200) and a base mechanism (100) arranged between the two sets of guard plate mechanisms (200), wherein a support mechanism (300) is arranged on the top of the base mechanism (100); Features: The base mechanism (100) comprises a base (101), and two sets of adjustable rods with adjustable lengths are connected to both sides of the base (101); The guard plate mechanism (200) comprises a guard plate (201) connected to an adjusting rod, and a diagonal support mechanism (400) for supporting the guard plate (201) is connected to one side of the guard plate (201); The support mechanism (300) comprises an installation box (301) arranged on the top of a base (101); a rotating mechanism (500) for adjusting the horizontal rotation of the installation box (301) is installed on the top of the base (101); moving rods (302) are arranged on both sides of the installation box (301); a fixed rod (303) is arranged inside the moving rod (302); a pressing plate (304) in contact with a guard plate (201) is connected to the side of the fixed rod (303) away from the installation box (301); a moving part for adjusting the horizontal movement of the moving rod (302) is installed on the installation box (301); and a linkage part for adjusting the movement of the fixed rod (303) is installed inside the moving rod (302).

2. A combined device for supporting a building foundation pit according to claim 1, characterized in that: The adjusting rod comprises a T-shaped extension rod A (102) and a T-shaped extension rod B (103) slidably connected in the T-shaped extension rod A (102); the base (101) is provided with a T-shaped slot for slidably receiving the T-shaped extension rod A (102); the base (101) is provided with a fixing bolt B for fixing the sliding position of the T-shaped extension rod B (103); and the base (101), the T-shaped extension rod A (102) and the bottom of the T-shaped extension rod B (103) are located in the same horizontal plane.

3. A combined device for supporting a building foundation pit according to claim 1, characterized in that: The diagonal bracing mechanism (400) comprises a telescopic rod (402), a hinge seat (401) is installed on one side of the guard plate (201), one end of the telescopic rod (402) is hinged to the hinge seat (401), and one end of the telescopic rod (402) away from the hinge seat (401) is rotatably connected to a positioning plate (403), and a bolt hole is provided on the positioning plate (403).

4. A combined device for supporting a building foundation pit according to claim 1, characterized in that: A lifting plate (202) is slidably arranged in the guard plate (201), and a plurality of plug rods (203) are connected to the bottom of the lifting plate (202). The bottom of the inner cavity of the guard plate (201) is communicated with the outside. A first screw rod (204) is rotatably installed in the guard plate (201). A first screw hole threadably matched with the first screw rod (204) is provided on the lifting plate (202). The top of the first screw rod (204) is connected to a first driven bevel gear (205). One side of the guard plate (201) is rotatably connected to a connecting shaft. The connecting shaft extends to the inner cavity of the guard plate (201) and is connected to a first active bevel gear (206) meshing with the first driven bevel gear (205). The end of the connecting shaft away from the first active bevel gear (206) is connected to a first rotating disk (207) arranged on the outer side of the guard plate (201), and a first positioning bolt (208) is threadedly connected to the eccentric portion of the first rotating disk (207).

5. A combined device for supporting a building foundation pit according to claim 1, characterized in that: The rotating mechanism (500) comprises a supporting tube (501) and a rotating column (503) which can rotate or slide in the supporting tube (501); the rotating column (503) is connected to the inner wall of the installation box (301); the side wall of the rotating column (503) is connected to four groups of limiting strips (504) arranged in a circular array; and the supporting tube (501) is provided with a limiting groove (502) corresponding to the limiting strip (504).

6. A combined device for supporting a building foundation pit according to claim 1, characterized in that: The moving member comprises a second screw rod (307); a moving cavity (305) corresponding to the four groups of moving rods (302) is provided in the installation box (301); a fixing plate (306) is connected in the moving cavity (305); the second screw rod (307) is rotatably installed on the fixing plate (306); a second screw hole corresponding to the second screw rod (307) is provided on the moving rod (302); two groups of second screw rods (307) are connected to a second driven bevel gear (308) at one end close to each other; and a driving member for driving the four groups of second driven bevel gears (308) to rotate synchronously is installed on the installation box (301).

7. A combined device for supporting a construction foundation pit according to claim 6, characterized in that: The driving member comprises a driving rod (310) rotatably mounted on the mounting box (301), two sets of second active bevel gears (309) being mounted on the driving rod (310), one set of second active bevel gears (309) being meshed with two sets of second driven bevel gears (308), the driving rod (310) extending to the outside of the mounting box (301) and fixedly connected to the second rotating disk, the eccentric portion of the second rotating disk being threadedly connected to a second positioning bolt.

8. A combined device for supporting a construction foundation pit according to claim 6, characterized in that: The linkage member comprises a gear (314), a mounting groove (312) is provided on the moving rod (302), the gear (314) is rotatably mounted in the mounting groove (312), the inner wall of the moving cavity (305) is fixedly connected to a rack A (311), the rack A (311) is meshed with the gear (314), the fixed rod (303) is slidably arranged in the moving rod (302), one side of the fixed rod (303) is fixedly connected to a rack B (313), and the rack B (313) is meshed with the gear (314).

9. A combined device for supporting a building foundation pit according to claim 1, characterized in that: A plurality of grooves are provided on two sides away from each other of the two sets of guard plates (201).

10. A combined device for supporting a building foundation pit according to claim 1, characterized in that: A side of the pressing plate (304) away from the fixing rod (303) is connected to an anti-slip pad.

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