A foundation pit support device for civil construction

Abstract

The present invention discloses a foundation pit support device for civil construction, which belongs to the technical field of foundation pit support, and includes a support body, wherein movable support boxes are arranged on both sides of the support body, and a vibration compaction assembly is arranged in the support box. In the present invention, by arranging an auxiliary support assembly, the first motor drives the second friction ring to gradually contact with the first friction ring and limit the first friction ring through a reciprocating screw, a first screw seat, and a sliding ring, so as to prevent the rotating ring from rotating. After that, the staff adjusts the support plate to a state parallel to the vertical surface of the foundation pit, and drives the adjustment screw, the second screw seat and the support plate to move to one side through the adjustment motor, so that the support plate fits the vertical surface of the foundation pit, thereby supporting and protecting the vertical surface of the foundation pit from the side, and forming a triangular support for the foundation pit with the support body, so as to assist in strengthening the support effect of the support box on the foundation pit, and at the same time, it can prevent the support body from being offset, and improve the support effect on the foundation pit.

Description

Technical Field

[0001] The invention belongs to the technical field of foundation pit support, and in particular relates to a foundation pit support device for civil construction. Background Art

[0002] With the development of economy and technology, the speed of urban construction is also accelerating. The first step in the construction process is to excavate the foundation pit at the designated location. The foundation pit support is to ensure the safety of underground structure construction and the surrounding environment of the foundation pit. It is a support, reinforcement and protection measure for the side walls of the foundation pit and the surrounding environment.

[0003] The invention patent with Chinese patent application number CN201910512715.8 discloses a subway foundation pit support structure, including a frame, a support plate, a support rod, a balance rod and a sinker block. Support plates are embedded on both sides of the frame, a support rod is embedded in the middle of the support plate, a balance rod is embedded in the middle of the support rod, and sinkers are embedded inside both sides of the support plate; the support rod includes a limit block, a fitting block, a rotating shaft and a fixed ring, the balance rod includes a fitting groove, a fixing groove and a limit groove, the sinker block includes a compression spring, a pulling plate and a telescopic plate, and the device is provided with a balance rod, through which the support rod can be controlled in time when it is tilted, but in actual use, the installation process of the support device is relatively cumbersome, and the installed support body lacks auxiliary support and is prone to displacement. Summary of the invention

[0004] The purpose of the present invention is to propose a foundation pit support device for civil construction in order to solve the problem that the installation process of the support device is relatively complicated and the installed support body lacks auxiliary support and is prone to deviation.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A foundation pit support device for civil construction, comprising a support body, movable support boxes are arranged on both sides of the support body, a vibration compaction assembly is arranged in the support box, auxiliary support assemblies are arranged on both sides of the outer surface of the support body, and a stabilizing assembly that penetrates into the foundation pit soil is arranged at the bottom of the auxiliary support assembly;

[0007] The auxiliary support assembly includes a freely rotatable rotating ring, which is rotatably connected to the outer surface of the support body. A connecting column is hinged at the bottom of the rotating ring. An adjustment motor is connected to the bottom of the connecting column via a first mounting plate. An adjustment screw is connected to one end of the output shaft of the adjustment motor. A second screw seat is threadedly connected to the outer surface of the adjustment screw. A support plate is hinged at the bottom of the second screw seat for auxiliary support during installation of the support body.

[0008] As a further description of the above technical solution:

[0009] Limiting slide bars are connected to both sides of the bottom of the connecting column, and the two limiting slide bars are respectively located on both sides of the adjusting screw. Two sliding holes are opened on one side of the second screw seat, and the limiting slide bars are slidably connected in the sliding holes. A mounting piece is connected between the two limiting slide bars, and the adjusting screw is rotatably connected in the mounting piece through a bearing.

[0010] As a further description of the above technical solution:

[0011] One side of the rotating ring is connected to a rotating gear ring, the top of the rotating gear ring is meshedly connected to a transmission gear, the top of the supporting body is connected to a first motor through a second mounting plate, and one end of the output shaft of the first motor is connected to one side of the transmission gear.

[0012] As a further description of the above technical solution:

[0013] A reciprocating screw is connected to the side of the transmission gear away from the first motor, and one end of the reciprocating screw away from the transmission gear is rotatably connected to a mounting seat, and the bottom of the mounting seat is connected to the top of the support body. The outer surface of the reciprocating screw is threadedly connected to a first screw seat, and the bottom of the first screw seat is connected to a sliding ring, and the sliding ring is slidably connected to the outer surface of the support body. A second friction ring is connected to one side of the sliding ring, and a first friction ring is connected to the side of the rotating ring away from the rotating gear ring. The second friction ring will contact and limit the first friction ring during movement.

[0014] As a further description of the above technical solution:

[0015] The stabilizing assembly includes two main spikes, which are connected to a support plate. A cavity is provided inside the main spike, and a plurality of mounting frames are connected inside the cavity. The plurality of mounting frames are distributed in a circular array along the axis of the main spike. A movable screw is rotatably connected to one side of the mounting frame, and a secondary spike is threadedly connected to the outer surface of one end of the movable screw. One end of the secondary spike extends to the outside of the cavity and is slidably connected to the cavity, so as to be laterally input into the soil layer to improve the connection stability with the foundation pit.

[0016] As a further description of the above technical solution:

[0017] Sliding grooves are provided on both sides of the mounting frame, and sliding blocks are connected to both sides of the auxiliary spikes, and the sliding blocks are slidably connected in the sliding grooves.

[0018] As a further description of the above technical solution:

[0019] One end of the movable screw away from the auxiliary spike extends to the other side of the mounting frame and is connected to a linkage gear. A connecting shaft is rotatably connected in the cavity, and a plurality of rotating toothed discs are connected to the outer surface of the connecting shaft. The bottom of the rotating toothed disc is meshed with the linkage gear. One end of the connecting shaft extends to the outside of the cavity and is connected to a knob.

[0020] As a further description of the above technical solution:

[0021] The vibration compaction assembly includes two groups of symmetrically arranged fixed frames, one side of the fixed frame is slidably connected to a sliding rod, one end of the sliding rod is connected to a vibration block, a side of the vibration block facing away from the sliding rod is affixed with a conduction pad, one side of the conduction pad is connected to a side of the inner wall of a support box, one end of the sliding rod away from the vibration block is connected to an extrusion wheel, a return spring is sleeved on the outer surface of the sliding rod, and two ends of the return spring are respectively connected to one side of the fixed frame and one side of the extrusion wheel.

[0022] As a further description of the above technical solution:

[0023] Two second motors are fixedly installed on one side of the support box, one end of the output shaft of the second motor extends into the support box and is connected to a rotating disk, one side of the rotating disk is connected to a plurality of extrusion blocks, the plurality of extrusion blocks are distributed in a circular array along the axis of the rotating disk, the cross-section of the extrusion block is a trapezoid, and the extrusion block periodically fits with the extrusion wheel during rotation.

[0024] As a further description of the above technical solution:

[0025] Travel grooves are provided on both sides of the support body, and sliding columns are slidably connected in the travel grooves. The other side of the sliding column is connected to one side of the support box. Multiple cylinders are connected to one side of the support body, and the multiple cylinders are distributed in an equiangular circular array along the axis of the sliding column. The other end of the cylinder is connected to one side of the support box.

[0026] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0027] 1. In the present invention, by setting an auxiliary support component, the adjustment motor drives the support plate to move downward and fit with the foundation pit ground through the adjustment screw and the second screw seat, so as to support and limit the support body at the support position, reduce the installation difficulty of the support body, and improve the installation efficiency and installation safety of the support body. After the installation of the support body is completed, the first motor drives the support plate to rotate 90 degrees through the transmission gear, the rotating gear ring, the rotating ring, the connecting column, the adjustment motor, the adjustment screw and the second screw seat. At the same time, the first motor drives the second friction ring to gradually contact with the first friction ring and limit the first friction ring through the reciprocating screw, the first screw seat, and the sliding ring to prevent the rotating ring from rotating. After that, the staff adjusts the support plate to a state parallel to the vertical surface of the foundation pit, and drives the adjustment screw, the second screw seat and the support plate to move to one side through the adjustment motor, so that the support plate fits with the vertical surface of the foundation pit, thereby supporting and protecting the vertical surface of the foundation pit from the side, and forming a triangular support for the foundation pit with the support body, which assists in strengthening the support effect of the support box on the foundation pit, and can prevent the support body from being offset, thereby improving the support effect on the foundation pit.

[0028] 2. In the present invention, by setting a vibration compaction component, when the support box is in contact with the vertical surface of the foundation pit, the second motor drives the extrusion block to rotate through the rotating disk, and the extrusion block cooperates with the reset spring to drive the extrusion wheel to reciprocate, and the extrusion wheel drives the vibration block to reciprocate through the sliding rod. The vibration block performs high-frequency knocking vibration on the conductive pad, and the conductive pad transmits the vibration to the outside of the support box and vibrates and compacts the vertical surface of the foundation pit in contact, thereby improving the compactness of the soil layer in the area. On the one hand, by compacting the soil, the soil connection of the vertical surface of the foundation pit can be made tighter, the possibility of soil layer collapse can be reduced, and the protectiveness of the device can be improved. On the other hand, the compacted soil layer is more conducive to preserving moisture in the underground soil layer and avoiding soil and water loss.

[0029] 3. In the present invention, by setting a stabilizing component, after the main spike penetrates into the foundation pit ground or vertical surface, the staff drives the linkage gear to rotate through the knob, the connecting shaft and the rotating gear plate, and the linkage gear drives the auxiliary spike to slide out of the cavity and penetrate into the foundation pit soil layer through the moving screw in conjunction with the sliding groove and the sliding block. The longitudinal penetration of the main spike and the lateral reinforcement of the auxiliary spike strengthen the connection effect between the column spike and the foundation pit, which prevents the support plate from moving or being easily pulled out, and can strengthen the fixing effect of the support plate, thereby improving the supporting effect of the support plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention;

[0031] Figure 2 A schematic diagram of a three-dimensional structure from another viewing angle of the present invention;

[0032] Figure 3 It is a three-dimensional structural schematic diagram of another state of the present invention;

[0033] Figure 4 For the present invention Figure 3 The enlarged structural diagram of part A in the middle;

[0034] Figure 5 It is a schematic diagram of the three-dimensional structure of the auxiliary support assembly of the present invention;

[0035] Figure 6 It is a schematic diagram of the three-dimensional structure of the stabilizing assembly of the present invention;

[0036] Figure 7 It is a schematic diagram of the internal three-dimensional structure of the stabilizing assembly of the present invention;

[0037] Figure 8 For the present invention Figure 7 The enlarged structural diagram of part B in the middle;

[0038] Fig. 9 It is a three-dimensional cross-sectional structural schematic diagram of the vibration compaction assembly of the present invention;

[0039] Fig.10 It is a schematic diagram of the internal three-dimensional structure of the vibration compaction assembly of the present invention.

[0040] Legend:

[0041] 1. Support body; 2. Auxiliary support assembly; 201. Support plate; 202. First motor; 203. Transmission gear; 204. First friction ring; 205. First lead screw seat; 206. Reciprocating lead screw; 207. Second lead screw seat; 208. Limiting slide bar; 209. Adjusting lead screw; 210. Mounting piece; 211. Adjusting motor; 212. Connecting column; 213. Rotating ring; 214. Sliding ring; 215. Second friction ring; 216. Rotating gear ring; 3. Support box; 4. Stabilizing assembly; 401. Main spike; 402. Knob; 403. Connecting Connecting shaft; 404, rotating toothed disc; 405, linkage gear; 406, sliding groove; 407, mounting frame; 408, auxiliary spike; 409, sliding block; 410, moving lead screw; 5, vibration compaction assembly; 501, second motor; 502, conduction pad; 503, rotating disc; 504, extrusion block; 505, vibration block; 506, fixing frame; 507, extrusion wheel; 508, reset spring; 509, sliding rod; 6, sliding column; 7, cylinder. DETAILED DESCRIPTION

[0042] 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.

[0043] See also Figure 1-Figure 10 , the present invention provides a technical solution:

[0044] A foundation pit support device for civil construction includes a support body 1, movable support boxes 3 are arranged on both sides of the support body 1, a vibration compaction component 5 is arranged in the support box 3, auxiliary support components 2 are arranged on both sides of the outer surface of the support body 1, and a stabilization component 4 that penetrates deep into the foundation pit soil is arranged at the bottom of the auxiliary support component 2, travel grooves are opened on both sides of the support body 1, a sliding column 6 is slidably connected in the travel groove, the other side of the sliding column 6 is connected to one side of the support box 3, a plurality of cylinders 7 are connected to one side of the support body 1, and the plurality of cylinders 7 are distributed in an equiangular circular array along the axis of the sliding column 6, and the other end of the cylinder 7 is connected to one side of the support box 3.

[0045] The auxiliary support assembly 2 includes a rotating ring 213 that can rotate freely. The rotating ring 213 is rotatably connected to the outer surface of the support body 1. A connecting column 212 is hinged at the bottom of the rotating ring 213. An adjusting motor 211 is connected to the bottom of the connecting column 212 through a first mounting plate. An adjusting screw 209 is connected to one end of the output shaft of the adjusting motor 211. A second screw seat 207 is threadedly connected to the outer surface of the adjusting screw 209. A support plate 201 is hinged at the bottom of the second screw seat 207, which is used for auxiliary support when the support body 1 is installed. Limiting slide bars 208 are connected to both sides of the bottom of the connecting column 212. The two limiting slide bars 208 are respectively located on both sides of the adjusting screw 209. Two sliding holes are provided on one side of the second screw seat 207. The limiting slide bars 208 are slidably connected to the sliding holes. A mounting piece 210 is connected between the two limiting slide bars 208. The adjusting screw 209 is rotatably connected to the mounting piece 210 through a bearing. The side is connected with a rotating gear ring 216, and the top of the rotating gear ring 216 is meshed with a transmission gear 203. The top of the support body 1 is connected with a first motor 202 through a second mounting plate. One end of the output shaft of the first motor 202 is connected to one side of the transmission gear 203. The side of the transmission gear 203 away from the first motor 202 is connected with a reciprocating screw 206, and the end of the reciprocating screw 206 away from the transmission gear 203 is rotatably connected to a mounting seat, and the bottom of the mounting seat is connected to the top of the support body 1. The outer surface of the reciprocating screw 206 is threadedly connected with a first screw seat 205, and the bottom of the first screw seat 205 is connected with a sliding ring 214, which is slidably connected to the outer surface of the support body 1, and one side of the sliding ring 214 is connected with a second friction ring 215, and the side of the rotating ring 213 away from the rotating gear ring 216 is connected to the first friction ring 204, and the second friction ring 215 will contact and limit the first friction ring 204 during the movement.

[0046] The specific implementation method is as follows: by setting the auxiliary support component 2, the adjustment motor 211 drives the support plate 201 to move downward and fit with the foundation pit ground through the adjustment screw 209 and the second screw seat 207, so as to limit the support position of the support body 1, reduce the installation difficulty of the support body 1, and improve the installation efficiency and installation safety of the support body 1. After the installation of the support body 1 is completed, the first motor 202 drives the support through the transmission gear 203, the rotating gear ring 216, the rotating ring 213, the connecting column 212, the adjustment motor 211, the adjustment screw 209 and the second screw seat 207. The support plate 201 rotates 90 degrees. At the same time, the first motor 202 drives the second friction ring 215 through the reciprocating screw 206, the first screw seat 205, and the sliding ring 214 to gradually contact the first friction ring 204 and limit the first friction ring 204 to prevent the rotating ring 213 from rotating. After that, the staff adjusts the support plate 201 to a state parallel to the vertical surface of the foundation pit, and drives the adjustment motor 211 to move the adjustment screw 209, the second screw seat 207 and the support plate 201 to one side, so that the support plate 201 is in contact with the vertical surface of the foundation pit, thereby supporting and protecting the vertical surface of the foundation pit from the side.

[0047] The stabilizing component 4 includes two main spikes 401, which are connected to the support plate 201. A cavity is provided inside the main spike 401, and a plurality of mounting brackets 407 are connected inside the cavity. The plurality of mounting brackets 407 are distributed in a circular array along the axis of the main spike 401. A movable lead screw 410 is rotatably connected to one side of the mounting bracket 407. An auxiliary spike 408 is threadedly connected to the outer surface of one end of the movable lead screw 410. One end of the auxiliary spike 408 extends to the outside of the cavity and is slidably connected to the cavity, so as to be laterally input into the soil layer, improve the connection stability with the foundation pit, and ensure safety. Sliding grooves 406 are provided on both sides of the mounting frame 407, and sliding blocks 409 are connected to both sides of the auxiliary spikes 408. The sliding blocks 409 are slidably connected in the sliding grooves 406. One end of the movable screw 410 away from the auxiliary spike 408 extends to the other side of the mounting frame 407 and is connected to a linkage gear 405. A connecting shaft 403 is rotatably connected in the cavity, and a plurality of rotating toothed discs 404 are connected to the outer surface of the connecting shaft 403. The bottom of the rotating toothed disc 404 is meshed with the linkage gear 405. One end of the connecting shaft 403 extends to the outside of the cavity and is connected to a knob 402.

[0048] The specific implementation method is as follows: by setting a stabilizing component 4, after the main spike 401 penetrates into the foundation pit ground or vertical surface, the staff drives the linkage gear 405 to rotate through the knob 402, the connecting shaft 403 and the rotating gear plate 404, and the linkage gear 405 drives the auxiliary spike 408 to slide out of the cavity and penetrate into the foundation pit soil layer through the moving screw 410 in conjunction with the sliding groove 406 and the sliding block 409. The longitudinal penetration of the main spike 401 and the lateral reinforcement of the auxiliary spike 408 strengthen the connection effect between the column spike and the foundation pit, thereby preventing the support plate 201 from moving or being easily pulled out.

[0049] The vibration compaction assembly 5 includes two sets of symmetrically arranged fixed frames 506, one side of the fixed frame 506 is slidably connected to a sliding rod 509, one end of the sliding rod 509 is connected to a vibration block 505, a side of the vibration block 505 away from the sliding rod 509 is attached to a conductive pad 502, one side of the conductive pad 502 is connected to one side of the inner wall of the support box 3, the end of the sliding rod 509 away from the vibration block 505 is connected to an extrusion wheel 507, and a return spring 508 is sleeved on the outer surface of the sliding rod 509, and the return spring 508 is The ends are respectively connected to one side of the fixed frame 506 and one side of the extrusion wheel 507. Two second motors 501 are fixedly installed on one side of the support box 3. One end of the output shaft of the second motor 501 extends into the support box 3 and is connected to a rotating disk 503. One side of the rotating disk 503 is connected to a plurality of extrusion blocks 504. The plurality of extrusion blocks 504 are distributed in a circular array along the axial position of the rotating disk 503. The cross-sectional shape of the extrusion block 504 is a trapezoid. During the rotation of the extrusion block 504, it periodically fits with the extrusion wheel 507.

[0050] The specific implementation method is as follows: by setting a vibration compaction component 5, when the support box 3 is in contact with the vertical surface of the foundation pit, the second motor 501 drives the extrusion block 504 to rotate through the drive shaft and the rotating disk 503, and the extrusion block 504 cooperates with the reset spring 508 to drive the extrusion wheel 507 to reciprocate, and the extrusion wheel 507 drives the vibration block 505 to reciprocate through the sliding rod 509. The vibration block 505 performs high-frequency knocking vibration on the conduction pad 502, and the conduction pad 502 transmits the vibration to the outside of the support box 3 and vibrates and compacts the vertical surface of the foundation pit that is in contact with it, thereby improving the compactness of the soil layer in this area, and can make the soil connection of the vertical surface of the foundation pit tighter by compacting the soil, reducing the possibility of soil layer collapse, and improving the protectiveness of the device.

[0051] Working principle: When in use, the staff moves the support device into the foundation pit through the lifting device. The staff adjusts the height of the support body 1 according to the actual support requirements. At this time, the connecting column 212 is perpendicular to the foundation pit ground, and the adjustment motor 211 drives the adjustment screw 209 to rotate. The adjustment screw 209 cooperates with the limiting slide bar 208 to drive the second screw seat 207 to move downward. The second screw seat 207 drives the support plate 201 to move downward and fit with the foundation pit ground, thereby limiting the support position of the support body 1.

[0052] Afterwards, multiple cylinders 7 drive the support box 3 to move to both sides, and make the support box 3 gradually fit with the vertical surface of the foundation pit. When the support box 3 fits with the vertical surface of the foundation pit, the second motor 501 is started, and the second motor 501 drives the rotating disk 503 to rotate, and the rotating disk 503 drives multiple extrusion blocks 504 to rotate. The extrusion block 504 periodically drives the extrusion wheel 507 to move, and when the extrusion block 504 is separated from the extrusion wheel 507, the extrusion wheel 507 performs a reset movement driven by the reset spring 508, so that the extrusion wheel 507 can reciprocate. The extrusion wheel 507 drives the sliding rod 509 to reciprocate, and the sliding rod 509 drives the vibration block 505 to reciprocate. The vibration block 505 performs high-frequency knocking vibration on the conduction pad 502, and the conduction pad 502 transmits the vibration to the outside of the support box 3 and vibrates and compacts the fitted vertical surface of the foundation pit, thereby improving the compactness of the soil layer in this area.

[0053] After the support body 1 is installed, the adjustment motor 211 drives the second screw seat 207 to move through the adjustment screw 209, and the second screw seat 207 drives the support plate 201 to separate from the foundation pit ground. After that, the first motor 202 is started, the first motor 202 drives the transmission gear 203 to rotate, the transmission gear 203 drives the rotating gear ring 216 to rotate, the rotating gear ring 216 drives the rotating ring 213 to rotate, and the rotating ring 213 drives the connecting column 212, the adjustment motor 211, the adjustment screw 209, the second screw seat 207 and the support plate 201 to rotate 90 degrees. In this process, the first motor 202 drives the reciprocating screw 206 to rotate, and the reciprocating screw 206 drives the first screw seat 205 and the sliding ring 214 to move , the sliding ring 214 drives the second friction ring 215 to gradually approach the first friction ring 204. When the rotating ring 213 rotates 90 degrees, the second friction ring 215 gradually contacts the first friction ring 204 and limits the first friction ring 204 to prevent the rotating ring 213 from rotating. After that, the staff rotates the connecting column 212, so that the connecting column 212 drives the adjustment motor 211, the adjustment screw 209 and the second screw seat 207 to adjust the angle, and the staff adjusts the support plate 201 to a state parallel to the vertical surface of the foundation pit. After that, the adjustment motor 211 drives the support plate 201 to move to one side through the adjustment screw 209, the limiting slide rod 208 and the second screw seat 207, and makes the support plate 201 fit with the vertical surface of the foundation pit.

[0054] When the support plate 201 fits against the foundation pit ground or vertical surface, the main spike 401 penetrates into the foundation pit ground or vertical surface. Afterwards, the staff rotates the knob 402 through the tool, the knob 402 drives the connecting shaft 403 to rotate, the connecting shaft 403 drives the rotating gear plate 404 to rotate, the rotating gear plate 404 drives the linkage gear 405 to rotate, the linkage gear 405 drives the moving screw 410 to rotate, the moving screw 410 cooperates with the sliding groove 406 and the sliding block 409 to drive the auxiliary spike 408 to slide out of the cavity and penetrate into the foundation pit soil layer, thereby improving the supporting effect of the support plate 201.

[0055] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A foundation pit support device for civil construction, comprising a support body (1), characterized in that: Both sides of the support body (1) are provided with movable support boxes (3), and a vibration compaction component (5) is arranged inside the support box (3); both sides of the outer surface of the support body (1) are provided with auxiliary support components (2), and the bottom of the auxiliary support component (2) is provided with a stabilization component (4) that penetrates deep into the foundation pit soil; The auxiliary support assembly (2) comprises a freely rotatable rotating ring (213), the rotating ring (213) being rotatably connected to the outer surface of the support body (1), the bottom of the rotating ring (213) being hinged with a connecting column (212), the bottom of the connecting column (212) being connected to an adjustment motor (211) via a first mounting plate, one end of an output shaft of the adjustment motor (211) being connected to an adjustment screw (209), the outer surface of the adjustment screw (209) being threadedly connected to a second screw seat (207), the bottom of the second screw seat (207) being hinged with a support plate (201) for auxiliary support during installation of the support body (1), one side of the rotating ring (213) being connected to a rotating gear ring (216), the top of the rotating gear ring (216) being meshedly connected to a transmission gear (203), the top of the support body (1) being connected to a first motor (202) via a second mounting plate, One end of the output shaft of the first motor (202) is connected to one side of the transmission gear (203); a side of the transmission gear (203) away from the first motor (202) is connected to a reciprocating screw (206); an end of the reciprocating screw (206) away from the transmission gear (203) is rotatably connected to a mounting seat; the bottom of the mounting seat is connected to the top of the support body (1); the outer surface of the reciprocating screw (206) is threadedly connected to a first screw seat (205); a sliding ring (214) is connected to the bottom of the first screw seat (205); the sliding ring (214) is slidably connected to the outer surface of the support body (1); a second friction ring (215) is connected to one side of the sliding ring (214); a side of the rotating ring (213) away from the rotating gear ring (216) is connected to the first friction ring (204); the second friction ring (215) contacts the first friction ring (204) to limit position during movement; The stabilizing assembly (4) comprises two main spikes (401), the main spikes (401) being connected to the support plate (201), a cavity being provided inside the main spike (401), a plurality of mounting frames (407) being connected inside the cavity, the plurality of mounting frames (407) being distributed in a circular array along the axis of the main spike (401), a movable lead screw (410) being rotatably connected to one side of the mounting frame (407), a secondary spike (408) being threadedly connected to the outer surface of one end of the movable lead screw (410), one end of the secondary spike (408) extending to the outside of the cavity and being slidably connected to the cavity, for being used to be laterally input into the soil layer, thereby improving the connection stability with the foundation pit.

2. A foundation pit support device for civil construction according to claim 1, characterized in that: Both sides of the bottom of the connecting column (212) are connected to limit slide bars (208), and the two limit slide bars (208) are respectively located on both sides of the adjustment screw (209). Two sliding holes are opened on one side of the second screw seat (207), and the limit slide bars (208) are slidably connected in the sliding holes. A mounting member (210) is connected between the two limit slide bars (208), and the adjustment screw (209) is rotatably connected in the mounting member (210) through a bearing.

3. A foundation pit support device for civil construction according to claim 2, characterized in that: Sliding grooves (406) are provided on both sides of the mounting frame (407), and sliding blocks (409) are connected to both sides of the auxiliary spikes (408), and the sliding blocks (409) are slidably connected in the sliding grooves (406).

4. A foundation pit support device for civil construction according to claim 3, characterized in that: One end of the movable lead screw (410) away from the auxiliary spike (408) extends to the other side of the mounting frame (407) and is connected to a linkage gear (405). A connecting shaft (403) is rotatably connected in the cavity. The outer surface of the connecting shaft (403) is connected to a plurality of rotating toothed discs (404). The bottom of the rotating toothed discs (404) is meshed with the linkage gear (405). One end of the connecting shaft (403) extends to the outside of the cavity and is connected to a knob (402).

5. A foundation pit support device for civil construction according to claim 4, characterized in that: The vibration compaction assembly (5) comprises two groups of symmetrically arranged fixed frames (506), one side of the fixed frame (506) is slidably connected to a sliding rod (509), one end of the sliding rod (509) is connected to a vibration block (505), a side of the vibration block (505) facing away from the sliding rod (509) is fitted with a conduction pad (502), one side of the conduction pad (502) is connected to one side of the inner wall of the support box (3), one end of the sliding rod (509) away from the vibration block (505) is connected to an extrusion wheel (507), and a return spring (508) is sleeved on the outer surface of the sliding rod (509), and two ends of the return spring (508) are respectively connected to one side of the fixed frame (506) and one side of the extrusion wheel (507).

6. A foundation pit support device for civil construction according to claim 5, characterized in that: Two second motors (501) are fixedly mounted on one side of the support box (3); one end of the output shaft of the second motor (501) extends into the support box (3) and is connected to a rotating disk (503); one side of the rotating disk (503) is connected to a plurality of extrusion blocks (504); the plurality of extrusion blocks (504) are distributed in a circular array along the axis of the rotating disk (503); the cross-section of the extrusion blocks (504) is trapezoidal; and the extrusion blocks (504) periodically fit with the extrusion wheels (507) during rotation.

7. A foundation pit support device for civil construction according to claim 6, characterized in that: Both sides of the support body (1) are provided with travel grooves, in which sliding columns (6) are slidably connected, and the other side of the sliding column (6) is connected to one side of the support box (3). One side of the support body (1) is connected to a plurality of cylinders (7), and the plurality of cylinders (7) are distributed in an equiangular circular array along the axis of the sliding column (6), and the other end of the cylinder (7) is connected to one side of the support box (3).

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