Supporting structure in foundation pit and adjusting method

Abstract

The invention discloses a supporting structure in a foundation pit and an adjusting method, the supporting structure in the foundation pit comprises a plurality of supporting protection plates, and each supporting protection plate is provided with a corresponding supporting assembly; sliding side plates in sliding connection are arranged on the two side walls of the supporting protection plate correspondingly, and a jack a for driving the sliding side plates is installed on the outer wall of the supporting protection plate. The supporting assembly comprises a bottom plate, a supporting frame is fixedly connected to the top of the bottom plate, a plurality of fixedly-connected mounting plates are arranged on the outer wall of the supporting frame, fixedly-connected jacks b are arranged on the mounting plates, and a same fixedly-connected linkage frame is inserted into driving sleeves of the jacks b. The horizontal plane of the supporting protection plate can be transversely and longitudinally adjusted, and when the foundation pit collapses locally, the protection plate can be independently withdrawn, and the whole structure does not need to be dismantled.

Description

Technical Field

[0001] The invention belongs to the technical field of foundation pits and relates to a supporting structure in a foundation pit and an adjustment method. Background Art

[0002] A foundation pit is a pit excavated at the designed foundation location according to the base elevation and plan dimensions. Before excavation, a comprehensive analysis of geological and hydrological data, combined with the presence of nearby structures, should be conducted to determine the excavation plan and implement appropriate drainage measures. For shallow excavation depths, a sloped excavation method can be employed to stabilize the slope. The slope should be determined according to relevant construction project regulations. For deep excavation depths or those adjacent to buildings, pit wall support methods can be used to prevent the outer soil layer from collapsing.

[0003] The existing support structure of the foundation pit wall is generally formed into an integral structure by fixing multiple support plates to each other to protect the inner wall of the foundation pit. During subsequent use, when a relatively large collapse occurs in a certain area of ​​the inner wall of the foundation pit, the position of the support protection plate in the area cannot be flexibly adjusted, thereby reducing the use effect of the overall structural device.

[0004] Therefore, it is necessary to provide a new support structure in the foundation pit to solve the above technical problems. Summary of the Invention

[0005] In order to solve the above problems, the present invention provides a support structure in a foundation pit, which can adjust the support guard plate horizontally and vertically. In the event of local collapse, the guard plate can be withdrawn individually without dismantling the entire structure, thereby solving the problems existing in the prior art.

[0006] Another object of the present invention is to provide a method for adjusting a support structure in a foundation pit.

[0007] The technical solution adopted by the present invention is a support structure in a foundation pit, comprising a plurality of support guard plates, each of which is provided with a corresponding support assembly; Both side walls of the support guard plate are provided with sliding side plates that are slidably connected, and a jack a for driving the sliding side plates is installed on the outer wall of the support guard plate; The support assembly includes a base plate, the top of the base plate is fixedly connected to a support frame, the outer wall of the support frame is provided with a plurality of fixedly connected mounting plates, each mounting plate is provided with a fixedly connected jack b, and the driving sleeves of the plurality of jacks b are inserted with a same fixedly connected linkage frame; The driving end of the jack b is equipped with a fixedly connected adapter plate, and a fixedly connected pull rod is installed on the side wall of the adapter plate close to the support frame. A slidably connected support column is inserted into the interior of the adapter plate, one end of the support column is connected to the support guard plate, and a fixedly connected retaining ring is sleeved on the outer wall of the other end of the support column. The outer walls of the support column and the pull rod in the same mounting plate are sleeved with the same slidably connected linkage plate, and nuts are screwed on the outer walls of the support column and the pull rod to limit the linkage plate.

[0008] Furthermore, a shielding assembly is provided on the top of the supporting guard plate, and the shielding assembly includes a shielding cover. The shielding covers are provided in multiple numbers and distributed in a ring above the supporting guard plate. A mounting hole is opened inside the shielding cover, and a bolt is inserted inside the mounting hole to fix the shielding cover to the ground.

[0009] Furthermore, docking holes are provided on both sides of the interior of the shielding cover, a docking plate is provided between two adjacent shielding covers, and the docking plate is fixedly connected to the docking hole by bolts.

[0010] Furthermore, it also includes a top plate, which is provided with multiple top plates and distributed on the outside of the foundation pit opposite to the support guard plate. A positioning rod b is inserted into the inside of the top plate to fix it. A fixedly connected mounting frame is set on the top of the top plate, and a rotatably connected guide roller is set inside the mounting frame.

[0011] Furthermore, a rotatably connected winding roller is mounted on the top plate, and a winding motor for driving the winding roller is fixedly installed on the top plate. A steel wire rope is wound around the outer wall of the winding roller, one end of the steel wire rope is fixedly connected to the outer wall of the winding roller, and the other end of the steel wire rope is fixedly connected to the top of the corresponding support frame. The outer wall of the steel wire rope is against the outer wall of the guide roller, and the winding motor is a self-locking motor.

[0012] Furthermore, mounting grooves are provided on both side walls of the support guard plate, the inner walls of the mounting grooves are abutted against and slidably connected to the outer walls of the sliding side plates, a docking rubber strip is fixedly installed on the outer wall of the sliding side plates, and a plurality of evenly distributed guide rods are fixedly installed on the outer wall of the sliding side plates away from the docking rubber strips, and the outer walls of the guide rods are abutted against and slidably connected to the inner wall of the support guard plate.

[0013] Furthermore, the side wall of the sliding side plate is fixedly connected to the driving end of the jack a, and the jack a is fixedly installed below the outer wall of the support guard plate. A plurality of connecting tubes are fixedly installed on the outside of the support guard plate, and the inner wall of the connecting tube is threadedly connected to the outer wall of the end of the support column.

[0014] Furthermore, a connection assembly is provided on the top of each support frame, and the connection assembly includes a support block (51), which is fixedly mounted on the top of the support frame, and symmetrically distributed protrusions are fixedly mounted on the top of the support block, and a card slot is provided inside the protrusion.

[0015] Furthermore, a clamping sleeve is inserted into the interior of the slot and fixedly connected by bolts, a rotating sleeve with a rotational connection is installed on the outer wall of the clamping sleeve, a rotating cylinder is arranged between two adjacent clamping sleeves in two adjacent groups of connecting components, and a threaded driving rod is inserted on both sides of the interior of the rotating cylinder, and the end of the driving rod is fixedly connected to the outer wall of the corresponding rotating sleeve, and the thread directions of the threaded structures connecting the driving rods and the rotating cylinder on both sides are opposite.

[0016] A method for adjusting a support structure in a foundation pit, comprising the following steps: Step 1: First, pull and retract the sliding side panels on both sides of the support guard plate to be adjusted toward the center of the corresponding support guard plate, so that the two sides of the support guard plate are separated from the adjacent support guard plates on both sides outside; Step 2: Then the jack b can be controlled to retract, releasing the squeezing support on the support guard plate, so that the support guard plate can be moved away from the inner wall of the foundation pit; Step 3: After moving the supporting guard plate, the collapsed soil in the area can be cleaned, leveled and reinforced; Step 4: Then reinforce and reset the bottom plate and top plate corresponding to the support guard plate; Step 5: Then drive the jack b to squeeze the support guard plate so that the support guard plate is again against the inner wall of the foundation pit to achieve support for the inside of the foundation pit; Step 6: At this time, the jack a on the support guard plate can be controlled to work, so that it drives the sliding side plate to move outward from the inside of the support guard plate until the docking rubber strip on the outer wall of the sliding side plate abuts against the docking rubber strip on the other side, thereby achieving full shielding and support for the interior of the foundation pit; Step 7: Control the winding roller to reel in the wire rope to suspend the top of the support frame, increase the tension on the top of the support frame, and thus increase the lateral support force of the support frame on the support guard plate. At this point, the position adjustment of the inclined support guard plate can be completed.

[0017] The beneficial effects of the present invention are: 1. The present invention provides movable sliding side panels on both sides of the support guard plate and provides a support assembly on the outside thereof. Later in the installation and use of the device, the support guard plate can be adjusted horizontally and vertically, thereby improving the flexibility of the installation of the device. At the same time, it is also convenient for the staff to independently adjust and maintain a certain support guard plate in the later stage, shortening the adjustment time of the support structure.

[0018] 2. The present invention sets a shielding assembly. After completing the assembly of multiple support guard plates, multiple shielding covers in the shielding assembly are assembled to form an integral structure. At this time, the integral shielding cover can shield and protect the upper part of the connection between the assembled support guard plates and the foundation pit, thereby reducing the probability of rainwater seeping in from the gap between the two during subsequent use, causing the side wall of the foundation pit to collapse, thereby improving the support and protection effect of the device.

[0019] 3. The present invention sets up a top plate and other components on the outside of the top of the foundation pit. After the support guard plate is set up, the top plate can be connected to the support frame by a steel wire rope, thereby achieving suspension of the top of the support frame and further improving the lateral support strength of the support frame to the support guard plate.

[0020] 4. The present invention can fix the sleeve by installing the connecting assembly. After completing the installation of the support guard plate, the card block can be inserted into the card slot in each protrusion, and then the rotating cylinder is controlled to drive the moving rod to move, so that multiple support frames can be formed into an integrated structure, thereby further improving the support strength of the device for the support guard plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 A structural schematic diagram of a preferred embodiment of the support structure in the foundation pit provided by the present invention.

[0023] Figure 2 for Figure 1 The structural schematic diagram of the connection between the support guard plate and the support assembly is shown.

[0024] Figure 3 for Figure 2 Schematic diagram of the exploded structure of the support guard plate and its components shown.

[0025] Figure 4 for Figure 2 Schematic diagram of the structure of the support assembly shown.

[0026] Figure 5 for Figure 1 A partial structural diagram of the shielding component is shown.

[0027] Figure 6 for Figure 1 Schematic diagram of the structure of the top plate and its components shown.

[0028] Figure 7 for Figure 1 Schematic diagram of the structure of the connection components shown.

[0029] Figure 8 This is a schematic diagram of part of the structure after installation of an embodiment of the present invention.

[0030] Numbers in the figure: 1, support guard plate; 11, mounting groove; 111, connecting tube; 112, jack a; 12, sliding side plate; 121, guide rod; 122, docking rubber strip; 2, support assembly; 21, bottom plate; 211, positioning rod a; 22, support frame; 23, mounting plate; 231, jack b; 232, linkage frame; 24, adapter plate; 241, pull rod; 25, support column; 251, retaining ring; 252, linkage Moving plate; 3. Shielding assembly; 31. Shielding cover; 311. Mounting hole; 312. Docking hole; 32. Docking plate; 4. Top plate; 41. Positioning rod b; 42. Mounting frame; 421. Guide roller; 43. Winding roller; 431. Winding motor; 432. Wire rope; 5. Connecting assembly; 51. Support block; 511. Protrusion; 512. Slot; 52. Sleeve; 521. Rotating sleeve; 53. Rotating cylinder; 531. Driving rod. DETAILED DESCRIPTION

[0031] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described 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 making creative efforts are within the scope of protection of the present invention.

[0032] Example 1

[0033] A supporting structure in a foundation pit, such as Figure 1 As shown, it includes: a supporting guard plate 1 and a supporting assembly 2 for installing the supporting guard plate 1, and there are multiple supporting guard plates 1 and supporting assemblies 2.

[0034] like Figure 2-Figure 4As shown, both side walls of the support guard plate 1 are provided with sliding side plates 12 in a sliding connection, and the outer wall of the support guard plate 1 is provided with a jack a112 for driving the sliding side plates 12; the support assembly 2 includes a base plate 21, a positioning rod a211 for fixedly connecting the base plate 21 is inserted inside the base plate 21, and a fixedly connected support frame 22 is fixedly installed on the top of the base plate 21 by bolts, and a plurality of fixedly connected mounting plates 23 are provided on the outer wall of the support frame 22, and a fixedly connected jack b231 is provided on the mounting plate 23, and the same fixedly connected linkage frame 232 is inserted in the driving sleeve of the plurality of jacks b231; a fixedly connected adapter plate 24 is installed on the driving end of the jack b231, and a fixedly connected pull rod 241 is installed on the side wall of the adapter plate 24 close to the support frame 22, and a slidingly connected support column 25 is inserted inside the adapter plate 24, one end of the support column 25 is connected to the support guard plate 1, and a fixed The retaining ring 251 is fixedly connected, and the outer wall of the support column 25 and the pull rod 241 in the same mounting plate 23 is sleeved with a linkage plate 252 with the same sliding connection, and the outer wall of the support column 25 and the pull rod 241 are screwed with nuts to limit the linkage plate 252. The two side walls of the support guard plate 1 are provided with mounting grooves 11, and the inner wall of the mounting groove 11 is against and slidably connected to the outer wall of the sliding side plate 12. The outer wall of the sliding side plate 12 is fixedly installed with a docking rubber strip 122. The sliding side A plurality of evenly distributed guide rods 121 are fixedly installed on the outer wall of the plate 12 away from the docking rubber strip 122. The outer wall of the guide rod 121 is abutted against and slidably connected to the inner wall of the support guard plate 1. The side wall of the sliding side plate 12 is fixedly connected to the driving end of the jack a112. The jack a112 is fixedly installed below the outer wall of the support guard plate 1. A plurality of connecting tubes 111 are fixedly installed on the outside of the support guard plate 1, and the inner wall of the connecting tube 111 is threadedly connected to the outer wall of the end of the support column 25.

[0035] By providing movable sliding side panels 12 on both sides of the support guard plate 1 and providing a support assembly 2 on the outside thereof, the support guard plate 1 can be adjusted horizontally and vertically in the horizontal plane during the installation and use of the device in the later stage, thereby improving the flexibility of the device during installation and facilitating the independent adjustment of a certain support guard plate 1 by the staff in the later stage. When the support guard plate 1 is installed, the entire device is not subjected to external forces. When the jack a112 is working, it drives the sliding side panels 12 at the end to move until the butt joint rubber strips 122 on the side walls of the sliding side panels 12 on both sides are deformed to achieve the sealing of the gap between the two adjacent support guard plates 1. During the protection process, it is only necessary to ensure that the lateral bearing capacity of the mutually squeezed butt joint rubber strips 122 is greater than the lateral squeezing force of the soil pressure to avoid the occurrence of support discontinuity.

[0036] At the same time, since the two adjacent support guard plates 1 are connected by extrusion and abutment, in the subsequent use process, when the soil on the side wall of the foundation pit in the area of ​​a certain support guard plate 1 collapses, the support guard plate 1 in that area can be disassembled independently, which makes it convenient for the staff to clean and reinforce the soil in that area, and then re-install the support guard plate 1, thereby reducing the difficulty of repairing the device in the later stage of the work.

[0037] like Figure 5 As shown, a shielding assembly 3 for shielding and protecting the top of the supporting guard plate 1 is provided above the supporting guard plate 1. The shielding assembly 3 includes a shielding cover 31. The shielding cover 31 is provided with multiple shielding covers 31 and is distributed in a ring above the supporting guard plate 1. A mounting hole 311 is provided inside the shielding cover 31. Bolts for fixing the shielding cover 31 to the ground are inserted inside the mounting hole 311. Docking holes 312 are provided on both sides of the inside of the shielding cover 31. A docking plate 32 is arranged between two adjacent shielding covers 31, and the docking plate 32 is fixed to the docking hole 312 by bolts.

[0038] After completing the assembly of multiple support guard plates 1, multiple shielding covers 31 in the shielding assembly 3 are assembled to form an integral structure. At this time, the integral shielding cover 31 can shield and protect the upper part of the connection between the assembled support guard plate 1 and the foundation pit, thereby reducing the probability of rainwater seeping in from the gap between the two during subsequent use, causing the side wall of the foundation pit to collapse, thereby improving the support and protection effect of the device.

[0039] like Figure 6 As shown, it also includes a top plate 4, which is provided with a plurality of positions distributed on the outside of the foundation pit and opposite to the support guard plate 1, and a positioning rod b41 for fixing the top plate 4 is inserted inside the top plate 4, and a fixedly connected mounting frame 42 is set on the top of the top plate 4, and a rotatably connected guide roller 421 is set inside the mounting frame 42, and a rotatably connected winding roller 43 is set on the top plate 4, and a winding motor 431 for driving the winding roller 43 is fixedly installed on the top plate 4, and a steel wire rope 432 is wound around the outer wall of the winding roller 43, one end of the steel wire rope 432 is fixedly connected to the outer wall of the winding roller 43, and the other end of the steel wire rope 432 is fixedly connected to the top of the corresponding support frame 22, the outer wall of the steel wire rope 432 is against the outer wall of the guide roller 421, and the winding motor 431 is a self-locking motor.

[0040] After the support guard plate 1 is erected, the top plate 4 is connected to the support frame 22 via the wire rope 432. The winding motor 431 is then controlled to drive the winding roller 43 to rotate. The rotating winding roller 43 can then suspend the top of the support frame 22 by winding the wire rope 432. During this process, the guide roller 421 can smoothly guide the wire rope 432, making the movement of the wire rope 432 more stable. At the same time, since the winding motor 431 is a self-locking motor, it can prevent the winding roller 43 from rotating in the opposite direction due to the tension of the wire rope 432, thereby preventing the tightened wire rope 432 from loosening. After installation and adjustment, the support frame 22 is in a vertical state and does not provide additional lateral extrusion force to the components located on the support frame 22. The function of the wire rope 432 is to reduce the pressure on the top of the relatively long support frame 22 when the foundation pit collapses, and the top of the support frame 22 tilts toward the center of the foundation pit, thereby increasing the support strength of the support frame 22 after installation.

[0041] like Figure 7 As shown, a connecting assembly 5 is provided on the top of each support frame 22, and the connecting assembly 5 includes a support block 51, which is fixedly installed on the top of the support frame 22. A symmetrically distributed protrusion 511 is fixedly installed on the top of the support block 51, and a card slot 512 is opened inside the protrusion 511. A card sleeve 52 is inserted into the inside of the card slot 512 and fixedly connected by bolts. A rotatably connected rotating sleeve 521 is installed on the outer wall of the card sleeve 52. A rotating cylinder 53 is set between the adjacent two card sleeves 52 in the two adjacent groups of connecting assemblies 5. A threaded driving rod 531 is inserted on both sides of the rotating cylinder 53. The end of the driving rod 531 is fixedly connected to the outer wall of the corresponding rotating sleeve 521, and the thread direction of the threaded structure of the driving rod 531 on both sides is opposite to that of the rotating cylinder 53.

[0042] By setting the thread directions of the threaded structure connecting the driving rod 531 and the rotating cylinder 53 to be opposite, when in use, when the staff controls the rotating cylinder 53 to rotate, the driving rods 531 on both sides can be driven to move relative to or away from each other, so that the positions of the clamping sleeves 52 on both sides can be adjusted. At the same time, since the clamping sleeve 52 and the driving rod 531 are rotatably connected by the rotating sleeve 521, the clamping sleeve 52 can be smoothly inserted into the card groove 512 of the two adjacent protrusions 511 and fixedly connected by bolts, and then multiple support frames 22 can be connected to form a whole, thereby helping to improve the supporting strength of the support frame 22 on the support guard plate 1.

[0043] Example 2 A method for adjusting a support structure in a foundation pit, comprising the following steps: Step 1: First, pull and retract the sliding side panels 12 on both sides of the support guard plate 1 to be adjusted toward the center of the corresponding support guard plate 1, so that the two sides of the support guard plate 1 are separated from the adjacent support guard plates 1 on both sides outside; Step 2: Control the jack b231 to contract, release the squeeze support on the support guard plate 1, and thus allow the support guard plate 1 to move away from the inner wall of the foundation pit; Step 3: After moving the support guard plate 1, the collapsed soil in the area can be cleaned, leveled and reinforced; according to the actual situation, temporary support can be added when the guard plate is retracted and the collapsed soil is cleaned in steps 1 to 3; Step 4: Then, the bottom plate 21 and the top corresponding to the support guard plate 1 are reinforced and reset; Step 5: Then drive the jack b231 to squeeze the support guard plate 1 so that the support guard plate 1 is again against the inner wall of the foundation pit to achieve support for the inside of the foundation pit; Step 6: At this time, the jack a112 on the support guard plate 1 is controlled to work, so that it drives the sliding side plate 12 to move outward from the inside of the support guard plate 1 until the butt joint rubber strip 122 on the outer wall of the sliding side plate 12 abuts against the butt joint rubber strip 122 on the other side, thereby achieving full shielding and support for the interior of the foundation pit; Step 7: Control the reel 43 to reel in the wire rope 432, suspending the top of the support frame 22 and increasing the tension on the top of the support frame 22, thereby increasing the lateral support force of the support frame 22 on the support guard plate 1. This completes the position adjustment of the inclined support guard plate 1. When performing auxiliary tension reinforcement of the wire rope, the tension is controlled within a range that is compatible with the lifting force of the jack b231 to avoid offsetting the thrust of the jack b231.

[0044] The working principle of the support structure in the foundation pit provided by the embodiment of the present invention is as follows: When installing this device, if Figure 8 As shown, the base plate 21 can be first fixed to the inner bottom of the foundation pit by the positioning rod a211, and then the support frame 22 and the base plate 21 can be fixed by bolts. Then, the support guard plate 1 is taken out and placed inside the foundation pit opposite to the support frame 22, and then the support column 25 is inserted into the mounting plate 23 until its end is threadedly connected to the connecting tube 111 in the support guard plate 1. After completing the insertion and installation of the support column 25, the linkage plate 252 is taken out and the linkage plate 252 is put on the outside of the support column 25 and the pull rod 241, and then nuts are screwed on the ends of the support column 25 and the pull rod 241 to fix the linkage plate 252.

[0045] By moving the linkage frame 232 outside the jack b231, multiple jacks b231 can be driven synchronously. At this time, the extended jack b231 can lift and move the adapter plate 24 at the end, and the moving adapter plate 24 can pull the linkage plate 252 through the pull rod 241, so that the support column 25 and the support guard plate 1 at its end can be driven through the moving linkage plate 252, and the installation and movement of the support guard plate 1 can be realized.

[0046] Then, the jack a112 is controlled to work as needed. The working jack a112 can drive the sliding side plate 12 at the end, thereby changing the support area of ​​the support guard plate 1, and then the opposite sides of the two adjacent support guard plates 1 can be smoothly offset against each other, so that multiple support guard plates 1 can completely block, support and protect the inner wall of the foundation pit.

[0047] After completing the assembly of multiple support guard plates 1, the shielding assembly 3 can be taken out, and multiple shielding covers 31 can be assembled above the support guard plate 1 at the top of the foundation pit through bolts, so that the shielding cover 31 can shield and protect the upper part of the joint between the support guard plate 1 and the foundation pit, thereby reducing the probability of rainwater seeping in from the gap between the two during subsequent use, causing the side wall of the foundation pit to collapse, thereby improving the support and protection effect of the device.

[0048] Then, the top plate 4 is installed on the ground at a position opposite to multiple support frames 22 through the positioning rod b41, and then the end of the wire rope 432 on the winding roller 43 is fixedly connected to the top of the corresponding support frame 22. After the wire rope 432 is connected, the winding motor 431 can be controlled to drive the winding roller 43 to rotate and reel in the wire rope 432 until the wire rope 432 is tightened to suspend and stretch the top of the support frame 22, thereby reducing the tilting phenomenon of the top of the support frame 22 during later use, and thus helping to improve the lateral support strength of the support frame 22 on the support guard plate 1.

[0049] Then take out the rotating cylinder 53 in the connecting assembly 5, and insert the ferrules 52 at both ends of the rotating cylinder 53 into the card grooves 512 in the protrusion 511. After completing the insertion of the ferrule 52, use bolts to insert and fix the ferrule 52 and the protrusion 511, and then control the rotating cylinder 53 to rotate. At this time, the rotating cylinder 53 will drive the driving rods 531 on both sides of the interior to move relative to each other through the threaded structure with opposite thread directions on both sides of the interior, so that the two adjacent support frames 22 can be connected, so that the multiple support frames 22 form an integral structure, which can further improve the support strength of the device for the support guard plate 1.

[0050] The above description is only a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention are included in the scope of protection of the present invention.

Claims

1. A support structure in a foundation pit, comprising a plurality of support guard plates (1), characterized in that: Each supporting guard plate (1) is provided with a corresponding supporting assembly (2); Both side walls of the support guard plate (1) are provided with sliding side plates (12) in sliding connection, and a jack a (112) for driving the sliding side plates (12) is installed on the outer wall of the support guard plate (1); The support assembly (2) includes a base plate (21), a support frame (22) is fixedly connected to the top of the base plate (21), a plurality of fixedly connected mounting plates (23) are provided on the outer wall of the support frame (22), a jack b (231) is fixedly connected to each mounting plate (23), and a same fixedly connected linkage frame (232) is inserted into the driving sleeves of the plurality of jacks b (231); The driving end of the jack b (231) is provided with a fixedly connected adapter plate (24), a fixedly connected pull rod (241) is provided on a side wall of the adapter plate (24) close to the support frame (22), a slidably connected support column (25) is inserted into the interior of the adapter plate (24), one end of the support column (25) is connected to the support guard plate (1), a fixedly connected retaining ring (251) is sleeved on the outer wall of the other end of the support column (25), the outer walls of the support column (25) and the pull rod (241) in the same mounting plate (23) are sleeved with the same slidably connected linkage plate (252), and nuts for limiting the linkage plate (252) are screwed on the outer walls of the support column (25) and the pull rod (241).

2. The support structure in the foundation pit according to claim 1, characterized in that: A shielding assembly (3) is provided on the top of the support guard plate (1), the shielding assembly (3) comprising a shielding cover (31), a plurality of shielding covers (31) being provided and distributed annularly above the support guard plate (1), a mounting hole (311) being provided inside the shielding cover (31), and a bolt for fixing the shielding cover (31) to the ground being inserted inside the mounting hole (311).

3. The support structure in the foundation pit according to claim 2, characterized in that: Both sides of the shielding cover (31) are provided with docking holes (312), a docking plate (32) is provided between two adjacent shielding covers (31), and the docking plate (32) and the docking hole (312) are fixedly connected by bolts.

4. The support structure in the foundation pit according to claim 1, characterized in that: It also includes a top plate (4), wherein a plurality of the top plates (4) are provided and distributed at positions opposite to the support guard plate (1) outside the foundation pit, a positioning rod b (41) is inserted into the interior of the top plate (4) for fixed connection therewith, a fixedly connected mounting frame (42) is provided on the top of the top plate (4), and a rotatably connected guide roller (421) is provided inside the mounting frame (42).

5. The support structure in the foundation pit according to claim 4, characterized in that: A rotatably connected winding roller (43) is mounted on the top plate (4), a winding motor (431) for driving the winding roller (43) is fixedly mounted on the top plate (4), a steel wire rope (432) is wound around the outer wall of the winding roller (43), one end of the steel wire rope (432) is fixedly connected to the outer wall of the winding roller (43), the other end of the steel wire rope (432) is fixedly connected to the top of the corresponding support frame (22), the outer wall of the steel wire rope (432) is against the outer wall of the guide roller (421), and the winding motor (431) is a self-locking motor.

6. The support structure in the foundation pit according to claim 1, characterized in that: Both side walls of the support guard plate (1) are provided with mounting grooves (11), the inner walls of the mounting grooves (11) are in contact with and slidably connected to the outer walls of the sliding side plates (12), a docking rubber strip (122) is fixedly mounted on the outer wall of the sliding side plates (12), a plurality of evenly distributed guide rods (121) are fixedly mounted on the outer wall of the sliding side plates (12) away from the docking rubber strip (122), the outer walls of the guide rods (121) are in contact with and slidably connected to the inner wall of the support guard plate (1).

7. The support structure in the foundation pit according to claim 6, characterized in that: The side wall of the sliding side plate (12) is fixedly connected to the driving end of the jack a (112), and the jack a (112) is fixedly installed below the outer wall of the support guard plate (1). A plurality of connecting tubes (111) are fixedly installed on the outside of the support guard plate (1), and the inner wall of the connecting tube (111) is threadedly connected to the outer wall of the end of the support column (25).

8. The support structure in the foundation pit according to claim 1, characterized in that: A connecting assembly (5) is provided on the top of each support frame (22), wherein the connecting assembly (5) comprises a supporting block (51), wherein the supporting block (51) is fixedly mounted on the top of the support frame (22), and symmetrically distributed protrusions (511) are fixedly mounted on the top of the supporting block (51), and a card slot (512) is provided inside the protrusion (511).

9. The support structure in the foundation pit according to claim 8, characterized in that: A clamping sleeve (52) is inserted into the interior of the clamping slot (512) and fixedly connected by bolts. A rotating sleeve (521) is installed on the outer wall of the clamping sleeve (52). A rotating cylinder (53) is arranged between two adjacent clamping sleeves (52) in two adjacent groups of connecting assemblies (5). A threaded driving rod (531) is inserted on both sides of the interior of the rotating cylinder (53). The end of the driving rod (531) is fixedly connected to the outer wall of the corresponding rotating sleeve (521), and the thread directions of the threaded structures connecting the driving rod (531) and the rotating cylinder (53) on both sides are opposite.

10. The method for adjusting the support structure in a foundation pit according to any one of claims 1 to 9, wherein: The following steps are involved: Step 1: First, the sliding side panels (12) on both sides of the support guard plate (1) to be adjusted are pulled and retracted toward the center of the corresponding support guard plate (1), so that the two sides of the support guard plate (1) are separated from the adjacent support guard plates (1) on both sides outside; Step 2: The jack b (231) can then be controlled to contract, releasing the squeezing support on the support guard plate (1), thereby allowing the support guard plate (1) to move in a direction away from the inner wall of the foundation pit; Step 3: After the support guard plate (1) is moved, the soil in the collapsed area can be cleaned, leveled and reinforced; Step 4: Then, the bottom plate (21) and the top portion corresponding to the support guard plate (1) are reinforced and reset; Step 5: Then drive the jack b (231) to squeeze the support guard plate (1), so that the support guard plate (1) is again against the inner wall of the foundation pit, thereby achieving support for the interior of the foundation pit; Step 6: At this time, the jack a (112) on the support guard plate (1) can be controlled to work, so that it drives the sliding side plate (12) to move outward from the inside of the support guard plate (1) until the butt joint rubber strip (122) on the outer wall of the sliding side plate (12) abuts against the butt joint rubber strip (122) on the other side, thereby achieving full shielding support for the interior of the foundation pit; Step 7: Control the reel (43) to reel in the steel wire rope (432) to suspend the top of the support frame (22), thereby increasing the tension on the top of the support frame (22), thereby increasing the lateral support force of the support frame (22) on the support guard plate (1), and thus completing the position adjustment of the inclined support guard plate (1).

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