Civil engineering foundation pit anti-collapse supporting structure and construction method

Abstract

The invention relates to the technical field of foundation pit supporting, and provides a civil engineering foundation pit anti-collapse supporting structure and a construction method.The civil engineering foundation pit anti-collapse supporting structure is characterized in that a driving mechanism and a second positioner form a dynamic angle adjusting mechanism, a motor drives a worm gear to rotate through a worm, the worm gear drives a rotating rod to rotate, and a self-locking effect is formed between the worm and the worm gear; in the rotating process of the rotating rod, a first gear ring and a second gear ring are fixed to the two outer frame plates correspondingly, opposite-direction rotation is achieved through a first gear, a second gear and a bevel gear set which are meshed, the double-side supporting angle is synchronously controlled, a traditional welding / bolt fixing mode is replaced, operation is easy and fast, and the practicability is high. And a good supporting effect is achieved. The side supports and the first positioners are arranged to form the telescopic supporting units, linear stretching and retracting are achieved, the supporting size is adjustable, decoupling and independent operation with angle adjustment are achieved, the applicability is remarkably improved, and the supporting stability is further improved.

Description

Technical Field

[0001] The present invention relates to the technical field of foundation pit support, and in particular to a civil engineering foundation pit anti-collapse support structure and a construction method. Background Art

[0002] Foundation pit support is a measure used to support, reinforce, and protect the side walls of a foundation pit and its surroundings to ensure the safety of underground structure construction and the surrounding environment. Existing support structures include support plates and support rods that support the plates. Multiple support plates are connected in sequence to form a closed support plate wall, with the outer walls of the support plates abutting the inner walls of the foundation pit, and the bottoms of the support plates inserted into the pit. Multiple support rods are provided, positioned between the support plates, and their ends are welded to adjacent support plates. Support rod welding takes a long time, resulting in low worker efficiency.

[0003] A search revealed an existing patent (Announcement No. CN114809016B) that discloses a backfill-type foundation pit support structure, which improves worker efficiency. However, while this solution allows for quick installation and removal, it is inconvenient to adapt to angle changes at the corners of the foundation pit, requiring repeated adjustments, making the installation process more complicated. Furthermore, the support structure's dimensions cannot be adjusted accordingly to the actual pit conditions to better meet support requirements.

[0004] In view of this, the present invention proposes a civil engineering foundation pit anti-collapse support structure and a construction method. Summary of the Invention

[0005] The present invention proposes a civil engineering foundation pit anti-collapse support structure and construction method, which solves the problem that the existing support structure in the relevant technology is not convenient to adapt to the angle changes of the foundation pit corner position, and cannot adjust the size of the support structure accordingly according to the actual foundation pit conditions to better meet the support needs.

[0006] The technical solution of the present invention is as follows: a civil engineering foundation pit anti-collapse support structure, comprising a vertical shaft, two side supports are provided on the outside of the vertical shaft, the two side supports are rotatably connected to the vertical shaft, and a heightening plate is detachably installed on the upper side of the side supports;

[0007] The top end of the vertical shaft is fixedly connected to a hanging plate, the bottom end of the hanging plate is rotatably provided with a rotating rod, the bottom of the rotating rod is provided with a driving mechanism, and the rotating rod is driven by the driving mechanism;

[0008] A first positioner is provided between the side support and the rotating rod, for supporting and limiting the opening angle between the two side supports and being able to adjust the size of the side supports;

[0009] A second positioner is commonly provided between the two side supports and the rotating rod. When the rotating rod is driven to rotate by the driving mechanism, the angle between the two side supports can be adjusted by the second positioner.

[0010] A third positioner is provided on the top of the driving mechanism, and the rotating rod can be limited by the third positioner.

[0011] Preferably, the side support includes an outer frame plate, an inner plug-in cavity is provided on the inner side of the outer frame plate, an inner plug-in plate is slidingly sleeved on the inner side of the inner plug-in cavity, a push-pull groove connected to the inner side of the inner plug-in cavity is provided on the outer wall of the outer frame plate, and insertion holes are provided at the bottom of the inner plug-in plate and the outer frame plate, and the outer frame plate is rotatably sleeved on the outer side of the vertical shaft through a rotating sleeve.

[0012] Preferably, the first positioner comprises a plurality of trays fixedly sleeved on the outer wall of the rotating rod, a Y-shaped rod is detachably clamped between two adjacent trays, one end of the Y-shaped rod is fixedly connected to a screw rod, an internally threaded sleeve is threadedly sleeved on the outer side of the screw rod, and the end of the internally threaded sleeve away from the screw rod is rotatably connected to a push block;

[0013] The first positioner further comprises a fixing seat fixedly connected to the outer wall of the inner inserting plate, the fixing seat is slidably sleeved on the inner side of the push-pull groove, and the push block abuts against the junction of the fixing seat and the inner inserting plate.

[0014] Preferably, the second positioner includes a first gear ring and a second gear ring provided on the lower side of the first gear ring, one end of the first gear ring is fixedly connected to the outer wall of one of the outer frame plates, and one end of the second gear ring is fixedly connected to the outer wall of the other outer frame plate, the bottom end of the first gear ring is fixedly connected to a guide frame, the top of the second gear ring is provided with a T-shaped slide, and the bottom of the guide frame is slidably fitted with the T-shaped slide;

[0015] One of the outer frame plates is provided with a plurality of first through slots for the first gear ring and the guide frame to pass through, and the other outer frame plate is provided with a plurality of second through slots for the second gear ring to pass through.

[0016] Preferably, the second positioner further comprises a second gear fixedly sleeved on the outer wall of the rotating rod and a first gear rotatably sleeved on the outer wall of the rotating rod, the second gear meshing with the second gear ring, and the first gear meshing with the first gear ring;

[0017] The top of the second gear is fixedly connected to the second bevel gear, the bottom of the first gear is fixedly connected to the first bevel gear, the first bevel gear and the second bevel gear are meshed with a third bevel gear, the outer wall of the third bevel gear is rotatably connected to a cross bar, and the other end of the cross bar is fixedly connected to the outer wall of the vertical shaft.

[0018] Preferably, the third positioner includes a side hole fixing plate fixedly sleeved on the outer wall of the rotating rod, a horizontal bar is provided around each of the side hole fixing plates, a right-angle piece is hingedly connected between two adjacent horizontal bars, and the right-angle piece is hingedly connected to the top of the driving mechanism, one of the side walls of the horizontal bar is fixedly connected to an extrusion slide, and a fixed block is fixedly connected to the top of the driving mechanism on one side of the extrusion slide, and a threaded rod for pushing the extrusion slide is threadedly connected to the internal thread of the fixed block;

[0019] A guide sleeve is provided on one side of each horizontal bar, and the guide sleeve is fixedly connected to the top of the driving mechanism. A movable rod is slidably sleeved inside the guide sleeve, and one end of the movable rod is in contact with the side wall of the horizontal bar. The other end of the movable rod is fixedly connected to a positioning block that cooperates with the side hole fixing plate, and a spring sleeved on the outside of the movable rod is connected between the positioning block and the guide sleeve.

[0020] Preferably, the driving mechanism includes a base plate, a mounting box is fixedly connected to the top of the base plate, the right-angle piece is hinged to the top of the mounting box, and the bottom end of the guide sleeve is fixed to the top of the mounting box.

[0021] Preferably, a worm is rotatably connected inside the installation box, a motor for driving the worm is installed on the outer wall of the installation box, a worm wheel that cooperates with the worm is rotatably connected to the top of the base plate, and the rotating rod rotates through the top of the installation box and is fixedly connected to the top of the worm wheel.

[0022] Preferably, the heightened plate includes a docking plate, an extension groove is provided on the inner side of the docking plate, an extension plate is slidingly sleeved on the inner side of the extension groove, and the bottom ends of the extension plate and the docking plate are fixed with plug posts that match the sockets.

[0023] A construction method for a civil engineering foundation pit anti-collapse support structure comprises the following steps:

[0024] Step 1: According to the angle of the corner of the foundation pit, adjust the opening angle between the two side supports, place the vertical shaft at the corner between the two pit surfaces to be supported, and fix the bottom end of the vertical shaft and the bottom plate on the drive mechanism to the foundation pit through rivets. Start the motor, and the motor drives the worm gear to rotate through the worm, and the worm gear drives the rotating rod to rotate. A self-locking effect is formed between the worm and the worm gear to prevent the rotating rod from rotating.

[0025] Step 2: During the rotation of the rotating rod, the second gear and the second bevel gear thereon can be driven to rotate. Under the action of the third bevel gear, the first bevel gear and the first gear can rotate in opposite directions on the outer wall of the rotating rod. The different-direction rotation of the first gear and the second gear respectively pushes and pulls the first gear ring and the second gear ring in different directions, so that the second gear ring and the first gear ring can move away from or closer to each other, so that the guide frame can be staggered on the inner side of the T-shaped slide, and then the two outer frame plates can be pushed and rotated closer to or away from each other, so that the two outer frame plates can just adapt to the two adjacent pit surfaces of the foundation pit, and the second positioner can provide constraint limits for the two outer frame plates, and the outer frame plates can support the wall;

[0026] Step 3: When the two outer frame plates are respectively attached to the two walls of the foundation pit, the Y-shaped rod is overlapped on the pallet. The Y-shaped rod can rotate in any direction around the rotating rod on the horizontal plane. By rotating the internal threaded sleeve, the internal threaded sleeve can move on the outer wall of the screw rod, so that the push block at the other end of the internal threaded sleeve extends to the junction of the fixed seat and the inner insert plate, so that the push block contacts the fixed seat. At this time, the total length of the internal threaded sleeve and the screw rod continues to be extended, and the push block can push the fixed seat to make the inner insert plate extend from the inside of the outer frame plate. Therefore, the extension distance of the inner insert plate can be adjusted according to the length of the wall to be supported, and the two outer frame plates are further supported and limited by the first positioner;

[0027] Step 4: After the position adjustment of the two outer frame plates is completed, the threaded rod is screwed to push the extrusion slide through the threaded rod, so that the extrusion slide drives the horizontal bar fixed thereto to deviate, and the extrusion slide and the threaded rod slide relative to each other. Under the action of the right-angle piece, the right-angle piece rotates on the top of the installation box, and the four horizontal bars are synchronously offset and approach each other. The horizontal bar pushes the movable rod in contact with it, so that the spring between the positioning block and the guide sleeve is stretched, and the movable rod drives the positioning block to be inserted into the side wall of the side hole fixing plate, so that the four positioning blocks and the horizontal bar synchronously lock the position of the side hole fixing plate to prevent the side hole fixing plate and the rotating rod from rotating, thereby further improving the support stability;

[0028] Step 5: When the foundation pit is deep, a heightening plate can be installed on the top of the outer frame plate. According to the extended length of the inner insert plate inside the outer frame plate, the extension plate is extended accordingly, and the side support and heightening plate are assembled up and down through the insertion columns and holes;

[0029] Step 6: When storing the device, disassemble the first positioner and rotate the rotating rod through the driving mechanism. Under the pull of the second positioner, the two outer frame plates are flipped close to each other. As the two outer frame plates gradually approach each other, the first gear ring together with the guide frame at its bottom passes through the first through-groove, and the second gear ring passes through the second through-groove, so that the second positioner will not hinder the two outer frame plates from approaching each other, thereby facilitating the storage and transportation of the entire device.

[0030] The working principle and beneficial effects of the present invention are:

[0031] 1. In the present invention, a dynamic angle adjustment mechanism is formed by providing a driving mechanism and a second positioner. The motor drives the worm wheel to rotate through the worm, and the worm wheel drives the rotating rod to rotate. A self-locking effect is formed between the worm and the worm wheel to prevent the rotating rod from rotating. During the rotation of the rotating rod, the first gear ring and the second gear ring are respectively fixed to the two outer frame plates. The meshing first gear, the second gear and the bevel gear set realize counter-rotation, thereby realizing synchronous control of the bilateral support angle, replacing the traditional welding / bolt fixing method, being simple and quick to operate, and having a good support effect.

[0032] 2. In the present invention, a telescopic support unit is formed by arranging side supports and a first positioner. When the two outer frame plates are respectively attached to the two walls of the foundation pit, the Y-shaped rod is overlapped on the tray, and the Y-shaped rod can rotate in any direction around the rotating rod on the horizontal plane. By rotating the internal threaded sleeve, the internal threaded sleeve can move on the outer wall of the screw rod, so that the push block at the other end of the internal threaded sleeve extends to the junction of the fixed seat and the inner insert plate, so that the push block contacts the fixed seat. At this time, the total length of the internal threaded sleeve and the screw rod continues to be extended, and the push block can push the fixed seat, so that the inner insert plate extends from the inside of the outer frame plate, thereby realizing linear expansion and contraction according to the length of the wall to be supported, breaking the traditional coupling constraint, solving the problem of repeated operation caused by the mutual restraint of size adjustment and angle adjustment of traditional support structures, adapting to any combination of different wall lengths and foundation pit angles, and further improving support stability;

[0033] 3. In the present invention, the first positioner is disassembled, and the rotating rod is rotated by the driving mechanism. Under the pull of the second positioner, the two outer frame plates are flipped close to each other. As the two outer frame plates gradually approach each other, the first gear ring together with the guide frame at its bottom passes through the first through-groove, and the second gear ring passes through the second through-groove, so that the second positioner does not hinder the two outer frame plates from approaching each other, breaking through the inherent defect of mechanical interference when the traditional gear support structure is stored. The first gear ring is inserted and retracted through the first through-groove, and the second gear ring is inserted and retracted through the second through-groove, and the sliding separation of the guide frame and the T-shaped slide is coordinated, so that the gear set is completely embedded in the outer frame plate when stored. The operation is simple and quick, and the storage and transportation of the entire device is convenient.

[0034] 4. In the present invention, by setting a third positioner, the threaded rod pushes the single-side horizontal bar, and through the right-angle piece, the four horizontal bars are linked to shrink synchronously, driving the positioning block to lock the side hole fixing plate, and the single-point operation realizes the circumferential multi-point locking of the rotating rod. The structure is compact and reliable, and the support stability of the device is further improved. The support angle is automatically adjusted through the gear linkage mechanism. Combined with the modular telescopic and locking design, the adaptability, stability and portability problems of the corner support of the foundation pit are solved. Through the collaborative innovation of the decoupled telescopic support unit (first positioner) and the dynamic angle adjustment mechanism (second positioner), the size-angle linkage shackles are broken, and the support parameters are independently and accurately controlled; the gear ring is embedded in the groove for storage, which cures the stubborn problem of interference of traditional support machinery; the single-point driven circumferential locking (third positioner) cooperates with the first positioner and the second positioner to significantly improve the comprehensive effect of anti-drift ability. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0036] Figure 1 This is a schematic diagram of the three-dimensional structure of a civil engineering foundation pit anti-collapse support structure proposed by the present invention;

[0037] Figure 2 This is a schematic diagram of the side support and heightened plate assembly structure proposed by the present invention;

[0038] Figure 3 This is a schematic diagram of the assembly structure of the first positioner proposed in the present invention;

[0039] Figure 4 This is a schematic diagram of the installation structure of the second positioner proposed in the present invention;

[0040] Figure 5 for Figure 4 The enlarged structural diagram at B in the middle;

[0041] Figure 6 for Figure 1 A in the middle is an enlarged structural diagram;

[0042] Figure 7 for Figure 6 The enlarged structural diagram at C in the middle;

[0043] Figure 8 This is a schematic diagram of the internal structure of the installation box proposed by the present invention;

[0044] In the figure: 1. Side support; 11. Outer frame plate; 12. Inner insert plate; 13. Inner insert cavity; 14. Insert hole; 15. Push-pull groove; 16. First through groove; 17. Second through groove; 18. Rotary sleeve; 2. Vertical shaft; 3. Heightening plate; 31. Docking plate; 32. Extension groove; 33. Extension plate; 34. Insert column; 4. Hanging plate; 5. First positioner; 51. Fixing seat; 52. Push block; 53. Internal threaded sleeve; 54. Screw; 55. Y-shaped rod; 56. Tray; 6. Rotary rod; 7. Second positioner; 71. First gear ring; 72 , first gear; 73, first bevel gear; 74, third bevel gear; 75, cross bar; 76, second gear ring; 761, T-shaped slide; 77, second gear; 78, second bevel gear; 79, guide frame; 8, third positioner; 81, side hole fixing plate; 82, cross bar; 83, right-angle piece; 84, threaded rod; 85, fixing block; 86, extrusion slide; 87, positioning block; 88, guide sleeve; 89, movable rod; 9, driving mechanism; 91, base plate; 92, mounting box; 93, motor; 94, worm; 95, worm gear. DETAILED DESCRIPTION

[0045] 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 any creative efforts are within the scope of protection of the present invention.

[0046] Example 1

[0047] See also Figure 1 and Figure 2 A civil engineering foundation pit anti-collapse support structure and construction method includes a vertical shaft 2, two side supports 1 are arranged on the outside of the vertical shaft 2, the two side supports 1 are rotatably connected to the vertical shaft 2, and a heightening plate 3 is detachably installed on the upper side of the side support 1.

[0048] Among them, the side support 1 includes an outer frame plate 11, an inner insertion cavity 13 is opened on the inner side of the outer frame plate 11, an inner insertion plate 12 is slidingly sleeved on the inner side of the inner insertion cavity 13, and a push-pull groove 15 connected to the inner insertion cavity 13 is opened on the outer wall of the outer frame plate 11. The inner insertion plate 12 and the bottom of the outer frame plate 11 are both provided with a socket 14, and the outer frame plate 11 is rotatably sleeved on the outside of the vertical shaft 2 through a rotating sleeve 18.

[0049] The heightened plate 3 includes a docking plate 31 with an extension slot 32 formed inside. An extension plate 33 is slidably mounted inside the extension slot 32. Both the extension plate 33 and the docking plate 31 have posts 34 fixed to their bottom ends that mate with the sockets 14. When the foundation pit is deep, the heightened plate 3 can be installed on top of the outer frame plate 11. The extension plate 33 is extended accordingly based on the extended length of the inner insert plate 12 inside the outer frame plate 11. The side support 1 and heightened plate 3 are then assembled vertically using the posts 34 and sockets 14.

[0050] Example 2

[0051] See also Figure 1 、 Figure 3 、 Figure 6 、 Figure 7 as well as Figure 8 A civil engineering foundation pit anti-collapse support structure and construction method includes all the contents of Example 1. In addition, a hanging plate 4 is fixedly connected to the top of the vertical shaft 2, and a rotating rod 6 is rotatably provided at the bottom of the hanging plate 4. A driving mechanism 9 is provided at the bottom of the rotating rod 6, and the rotating rod 6 is driven by the driving mechanism 9. A first positioner 5 is provided between the side support 1 and the rotating rod 6, which is used to support and limit the opening angle between the two side supports 1 and can adjust the size of the side support 1. A third positioner 8 is provided on the top of the driving mechanism 9, and the rotating rod 6 can be limited by the third positioner 8.

[0052] The first positioner 5 comprises a plurality of trays 56 fixedly mounted on the outer wall of the rotating rod 6. A Y-shaped rod 55 is detachably mounted between two adjacent trays 56. A screw 54 is fixedly connected to one end of the Y-shaped rod 55. An internally threaded sleeve 53 is threadedly mounted on the outer side of the screw 54. A push block 52 is rotatably connected to the end of the internally threaded sleeve 53 away from the screw 54. The first positioner 5 also comprises a fixed base 51 fixed to the outer wall of the inner insert 12. The fixed base 51 is slidably mounted inside the push-pull slot 15. The push block 52 abuts the junction between the fixed base 51 and the inner insert 12.

[0053] The third positioner 8 includes a side hole fixing plate 81 fixedly mounted on the outer wall of the rotating rod 6. A horizontal bar 82 is provided around each side of the side hole fixing plate 81. A right-angle piece 83 is hingedly connected between two adjacent horizontal bars 82. The right-angle piece 83 is hingedly connected to the top of the driving mechanism 9. An extrusion slide 86 is fixedly connected to the side wall of one of the horizontal bars 82. A fixed block 85 is fixedly connected to the top of the driving mechanism 9 on the side of the extrusion slide 86. The fixed block 85 is internally threaded with a threaded rod 84 that pushes the extrusion slide 86. A guide sleeve 88 is provided on one side of each horizontal bar 82. The guide sleeve 88 is fixed to the top of the driving mechanism 9. A movable rod 89 is slidably mounted inside the guide sleeve 88. One end of the movable rod 89 contacts the side wall of the horizontal bar 82. The other end of the movable rod 89 is fixedly connected to a positioning block 87 that cooperates with the side hole fixing plate 81. A spring that is sleeved on the outside of the movable rod 89 is connected between the positioning block 87 and the guide sleeve 88.

[0054] The drive mechanism 9 includes a base plate 91, with an installation box 92 fixedly connected to the top of the base plate 91. The right-angle piece 83 is hingedly connected to the top of the installation box 92, and the bottom end of the guide sleeve 88 is fixedly connected to the top of the installation box 92. A worm 94 is rotatably connected to the interior of the installation box 92. A motor 93 is mounted on the outer wall of the installation box 92 to drive the worm 94. A worm gear 95 is rotatably connected to the top of the base plate 91, which cooperates with the worm 94. The rotating rod 6 rotates through the top of the installation box 92 and is fixedly connected to the top of the worm gear 95. When the motor 93 is started, the motor 93 drives the worm gear 95 to rotate via the worm 94, and the worm gear 95 drives the rotating rod 6 to rotate. A self-locking effect is formed between the worm 94 and the worm gear 95 to prevent the rotating rod 6 from rotating.

[0055] In this embodiment, when the two outer frame plates 11 are respectively attached to the two walls of the foundation pit, the Y-shaped rod 55 is overlapped on the tray 56, and the Y-shaped rod 55 can be rotated in any direction around the rotating rod 6 on the horizontal plane. By rotating the internally threaded sleeve 53, the internally threaded sleeve 53 can move on the outer wall of the screw rod 54, so that the push block 52 at the other end of the internally threaded sleeve 53 extends to the junction of the fixed seat 51 and the inner insert plate 12, so that the push block 52 contacts the fixed seat 51. At this time, the total length of the internally threaded sleeve 53 and the screw rod 54 continues to be extended, and the push block 52 can push the fixed seat 51, so that the inner insert plate 12 extends from the inside of the outer frame plate 11, so that the extension distance of the inner insert plate 12 can be adjusted according to the length of the wall to be supported, and the two outer frame plates 11 are further supported and limited by the first positioner 5.

[0056] In this embodiment, after the position adjustment of the two outer frame plates 11 is completed, the threaded rod 84 is screwed, and the extrusion slide 86 is pushed by the threaded rod 84, so that the extrusion slide 86 drives the horizontal bar 82 fixed thereto to deviate, and the extrusion slide 86 and the threaded rod 84 slide relative to each other. Under the action of the right-angle piece 83, the right-angle piece 83 rotates on the top of the installation box 92, and the four horizontal bars 82 are synchronously offset and approach each other. The horizontal bar 82 pushes the movable rod 89 in contact with it, so that the spring between the positioning block 87 and the guide sleeve 88 is stretched, and the movable rod 89 drives the positioning block 87 to be inserted into the side wall of the side hole fixing plate 81, so that the four positioning blocks 87 and the horizontal bar 82 synchronously lock the position of the side hole fixing plate 81, preventing the side hole fixing plate 81 and the rotating rod 6 from rotating, thereby further improving the support stability.

[0057] Example 3

[0058] See also Figure 1 、 Figure 2 、 Figure 4 as well as Figure 5 A civil engineering foundation pit anti-collapse support structure and construction method includes all the contents of Example 2. In addition, a second positioner 7 is commonly provided between the two side supports 1 and the rotating rod 6. In the process of driving the rotating rod 6 to rotate by the driving mechanism 9, the angle between the two side supports 1 can be adjusted by the second positioner 7.

[0059] Among them, the second positioner 7 includes a first gear ring 71 and a second gear ring 76 arranged on the lower side of the first gear ring 71, one end of the first gear ring 71 is fixed to the outer wall of one of the outer frame plates 11, and one end of the second gear ring 76 is fixed to the outer wall of the other outer frame plate 11. The bottom end of the first gear ring 71 is fixed with a guide frame 79, and the top of the second gear ring 76 is provided with a T-shaped slide 761, and the bottom of the guide frame 79 is slidably fitted with the T-shaped slide 761; a plurality of first through grooves 16 are opened through one of the outer frame plates 11 for the first gear ring 71 and the guide frame 79 to be inserted, and a plurality of second through grooves 17 are opened through the other outer frame plate 11 for the second gear ring 76 to be inserted.

[0060] Furthermore, the second positioner 7 also includes a second gear 77 fixedly mounted on the outer wall of the rotating rod 6 and a first gear 72 rotatably mounted on the outer wall of the rotating rod 6. The second gear 77 is engaged with the second gear ring 76, and the first gear 72 is engaged with the first gear ring 71.

[0061] Furthermore, a second bevel gear 78 is fixed to the top of the second gear 77, a first bevel gear 73 is fixed to the bottom of the first gear 72, a third bevel gear 74 is meshed between the first bevel gear 73 and the second bevel gear 78, and the outer wall of the third bevel gear 74 is rotatably connected to a cross bar 75, and the other end of the cross bar 75 is fixed to the outer wall of the vertical shaft 2.

[0062] When the cam 72 is in the closed position, the second gear 77 and the second bevel gear 78 on the cam 72 are in the closed position, and the cam 72 is in the closed position, so that the cam 72 is ...

[0063] Working principle and usage process: First, adjust the opening angle between the two side supports 1 according to the angle at the corner of the foundation pit, place the vertical shaft 2 at the corner between the two pit surfaces to be supported, and fix the bottom end of the vertical shaft 2 and the bottom plate 91 on the driving mechanism 9 to the foundation pit through rivets, start the motor 93, and the motor 93 drives the worm gear 95 to rotate through the worm 94, and the worm gear 95 drives the rotating rod 6 to rotate, forming a self-locking effect between the worm 94 and the worm gear 95 to prevent the rotating rod 6 from rotating. When the foundation pit is deep, the heightening plate 3 can be installed on the top of the outer frame plate 11, and the extension plate 33 can be extended accordingly according to the extension length of the inner insert plate 12 inside the outer frame plate 11, and the side support 1 and the heightening plate 3 are assembled up and down through the plug column 34 and the socket 14.

[0064] When the second gear 77 and the second bevel gear 78 are in engagement with each other, the first bevel gear 73 and the first gear 72 are in engagement with each other, and the second bevel gear 78 is in engagement with each other, so that the first bevel gear 73 and the first gear 72 are in engagement with each other, and the second bevel gear 73 is in engagement with each other, so that the second gear 76 and the first gear 71 are in engagement with each other, so that the second gear 76 and the first gear 71 are in engagement with each other, so that the second gear 76 and the first gear 71 are in engagement with each other, so that the guide frame 79 is displaced on the inner side of the T-shaped slide 761, so that the two outer frame plates 11 are pushed and rotated to move closer to or away from each other, so that the two outer frame plates 11 can just adapt to the two adjacent pit surfaces of the foundation pit, and the second positioner 7 can provide constraint and limit for the two outer frame plates 11, so that the outer frame plates 11 can support the wall. When the two outer frame plates 11 are respectively attached to the two walls of the foundation pit, the Y-shaped rod 55 is overlapped on the tray 56, and the Y-shaped rod 55 can be rotated in any direction around the rotating rod 6 on the horizontal plane. By rotating the internal threaded sleeve 53, the internal threaded sleeve 53 can move on the outer wall of the screw rod 54, so that the push block 52 at the other end of the internal threaded sleeve 53 extends to the junction of the fixed seat 51 and the inner insert plate 12, so that the push block 52 contacts the fixed seat 51. At this time, the total length of the internal threaded sleeve 53 and the screw rod 54 continues to be extended, and the push block 52 can push the fixed seat 51, so that the inner insert plate 12 extends from the inside of the outer frame plate 11, so that the extension distance of the inner insert plate 12 can be adjusted according to the length of the wall to be supported, and the two outer frame plates 11 are further supported and limited by the first positioner 5.

[0065] After the position adjustment of the two outer frame plates 11 is completed, the threaded rod 84 is screwed, and the extrusion slide 86 is pushed by the threaded rod 84, so that the extrusion slide 86 drives the horizontal bar 82 fixed thereto to deviate, and the extrusion slide 86 and the threaded rod 84 slide relative to each other. Under the action of the right-angle piece 83, the right-angle piece 83 rotates on the top of the installation box 92, and the four horizontal bars 82 are synchronously offset and approach each other. The horizontal bar 82 pushes the movable rod 89 in contact with it, so that the spring between the positioning block 87 and the guide sleeve 88 is stretched, and the movable rod 89 drives the positioning block 87 to be inserted into the side wall of the side hole fixing plate 81, so that the four positioning blocks 87 and the horizontal bar 82 synchronously lock the position of the side hole fixing plate 81, preventing the side hole fixing plate 81 and the rotating rod 6 from rotating, thereby further improving the support stability.

[0066] When the device is to be stored, the first positioner 5 is disassembled, and the rotating rod 6 is rotated by the driving mechanism 9. Under the pull of the second positioner 7, the two outer frame plates 11 are flipped close to each other. As the two outer frame plates 11 gradually approach each other, the first gear ring 71 together with the guide frame 79 at its bottom passes through the first through groove 16, and the second gear ring 76 passes through the second through groove 17, so that the second positioner 7 will not hinder the two outer frame plates 11 from approaching each other, thereby facilitating the storage and transportation of the entire device.

[0067] It is worth noting that the circuits, electronic components and modules involved in the present invention are all existing technologies and can be fully implemented by those skilled in the art. Needless to say, the content protected by the present invention does not involve improvements to software and methods.

[0068] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A civil engineering foundation pit anti-collapse support structure, comprising a vertical shaft (2), characterized in that: Two side supports (1) are provided on the outside of the vertical shaft (2), the two side supports (1) are rotatably connected to the vertical shaft (2), and a heightening plate (3) is detachably mounted on the upper side of the side supports (1); The top end of the vertical shaft (2) is fixedly connected to a hanging plate (4), the bottom end of the hanging plate (4) is rotatably provided with a rotating rod (6), the bottom of the rotating rod (6) is provided with a driving mechanism (9), and the rotating rod (6) is driven by the driving mechanism (9); A first positioner (5) is provided between the side support (1) and the rotating rod (6), for supporting and limiting the opening angle between the two side supports (1) and being able to adjust the size of the side support (1); A second positioner (7) is provided between the two side supports (1) and the rotating rod (6). When the rotating rod (6) is driven to rotate by the driving mechanism (9), the angle between the two side supports (1) can be adjusted by the second positioner (7). A third positioner (8) is provided on the top of the driving mechanism (9), and the rotating rod (6) can be limited by the third positioner (8).

2. A civil engineering foundation pit anti-collapse support structure according to claim 1, characterized in that: The side support (1) comprises an outer frame plate (11), an inner insert cavity (13) is provided on the inner side of the outer frame plate (11), an inner insert plate (12) is slidably sleeved on the inner side of the inner insert cavity (13), a push-pull groove (15) communicating with the inner side of the inner insert cavity (13) is provided on the outer wall of the outer frame plate (11), an insertion hole (14) is provided on the bottom of the inner insert plate (12) and the outer frame plate (11), and the outer frame plate (11) is rotatably sleeved on the outer side of the vertical shaft (2) through a rotating sleeve (18).

3. A civil engineering foundation pit anti-collapse support structure according to claim 2, characterized in that: The first positioner (5) includes a plurality of trays (56) fixedly sleeved on the outer wall of the rotating rod (6), a Y-shaped rod (55) is detachably clamped between two adjacent trays (56), one end of the Y-shaped rod (55) is fixedly connected to a screw rod (54), an outer threaded sleeve (53) is threadedly sleeved on the outer side of the screw rod (54), and an end of the internal threaded sleeve (53) away from the screw rod (54) is rotatably connected to a push block (52); The first positioner (5) further comprises a fixing seat (51) fixedly connected to the outer wall of the inner insert plate (12), the fixing seat (51) being slidably sleeved on the inner side of the push-pull groove (15), and the push block (52) being in contact with the junction between the fixing seat (51) and the inner insert plate (12).

4. A civil engineering foundation pit anti-collapse support structure according to claim 3, characterized in that: The second positioner (7) includes a first gear ring (71) and a second gear ring (76) arranged on the lower side of the first gear ring (71), one end of the first gear ring (71) is fixedly connected to the outer wall of one of the outer frame plates (11), and one end of the second gear ring (76) is fixedly connected to the outer wall of the other outer frame plate (11), the bottom end of the first gear ring (71) is fixedly connected to a guide frame (79), the top of the second gear ring (76) is provided with a T-shaped slide (761), and the bottom of the guide frame (79) is slidably fitted with the T-shaped slide (761); One of the outer frame plates (11) is provided with a plurality of first through-grooves (16) for the first gear ring (71) and the guide frame (79) to be inserted therethrough, and the other outer frame plate (11) is provided with a plurality of second through-grooves (17) for the second gear ring (76) to be inserted therethrough.

5. A civil engineering foundation pit anti-collapse support structure according to claim 4, characterized in that: The second positioner (7) further comprises a second gear (77) fixedly sleeved on the outer wall of the rotating rod (6) and a first gear (72) rotatably sleeved on the outer wall of the rotating rod (6), the second gear (77) being meshed with the second gear ring (76), and the first gear (72) being meshed with the first gear ring (71); The top of the second gear (77) is fixedly connected to a second bevel gear (78), the bottom of the first gear (72) is fixedly connected to a first bevel gear (73), the first bevel gear (73) and the second bevel gear (78) are meshed with a third bevel gear (74), the outer wall of the third bevel gear (74) is rotatably connected to a cross bar (75), and the other end of the cross bar (75) is fixedly connected to the outer wall of the vertical shaft (2).

6. A civil engineering foundation pit anti-collapse support structure according to claim 5, characterized in that: The third positioner (8) includes a side hole fixing plate (81) fixedly sleeved on the outer wall of the rotating rod (6), a horizontal bar (82) is provided around each of the side hole fixing plate (81), a right-angle piece (83) is hingedly connected between two adjacent horizontal bars (82), and the right-angle piece (83) is hingedly connected to the top of the driving mechanism (9), one of the side walls of the horizontal bar (82) is fixedly connected to an extrusion slide (86), and a fixed block (85) is fixedly connected to the top of the driving mechanism (9) located on one side of the extrusion slide (86), and the internal thread of the fixed block (85) is connected to a threaded rod (84) for pushing the extrusion slide (86); A guide sleeve (88) is provided on one side of each horizontal bar (82), and the guide sleeve (88) is fixedly connected to the top of the driving mechanism (9). A movable rod (89) is slidably sleeved inside the guide sleeve (88), and one end of the movable rod (89) is in contact with the side wall of the horizontal bar (82). The other end of the movable rod (89) is fixedly connected to a positioning block (87) that cooperates with the side hole fixing plate (81), and a spring that is sleeved on the outside of the movable rod (89) is connected between the positioning block (87) and the guide sleeve (88).

7. A civil engineering foundation pit anti-collapse support structure according to claim 6, characterized in that: The driving mechanism (9) comprises a base plate (91), the top end of the base plate (91) is fixedly connected to a mounting box (92), the right-angle piece (83) is hinged to the top of the mounting box (92), and the bottom end of the guide sleeve (88) is fixedly connected to the top of the mounting box (92).

8. A civil engineering foundation pit anti-collapse support structure according to claim 7, characterized in that: A worm (94) is rotatably connected inside the installation box (92), a motor (93) for driving the worm (94) is installed on the outer wall of the installation box (92), a worm wheel (95) that matches the worm (94) is rotatably connected to the top of the base plate (91), and the rotating rod (6) rotates through the top of the installation box (92) and is fixedly connected to the top of the worm wheel (95).

9. The anti-collapse supporting structure for foundation pits in civil engineering according to claim 2, characterized in that: The heightened plate (3) comprises a docking plate (31), an extension groove (32) is provided on the inner side of the docking plate (31), an extension plate (33) is slidably sleeved on the inner side of the extension groove (32), and the bottom ends of the extension plate (33) and the docking plate (31) are both fixedly connected with a plug post (34) that matches the socket (14).

10. A construction method for a foundation pit anti-collapse support structure for civil engineering, characterized in that: The following steps are involved: Step 1: According to the angle of the corner of the foundation pit, the opening angle between the two side supports (1) is adjusted, the vertical shaft (2) is placed at the corner between the two pit surfaces to be supported, and the bottom end of the vertical shaft (2) and the bottom plate (91) on the driving mechanism (9) are fixed to the foundation pit through rivets, and the motor (93) is started. The motor (93) drives the worm wheel (95) to rotate through the worm (94), and the worm wheel (95) drives the rotating rod (6) to rotate. A self-locking effect is formed between the worm (94) and the worm wheel (95) to prevent the rotating rod (6) from rotating. Step 2: During the rotation of the rotating rod (6), the second gear (77) and the second bevel gear (78) thereon can be driven to rotate. Under the action of the third bevel gear (74), the first bevel gear (73) and the first gear (72) can rotate in opposite directions on the outer wall of the rotating rod (6). The first gear (72) and the second gear (77) rotate in opposite directions, respectively pushing and pulling the first gear ring (71) and the second gear ring (76) in opposite directions, so that the second gear ring (76) and the first gear ring (71) can move away from or closer to each other, so that the guide frame (79) is displaced on the inner side of the T-shaped slide (761), and then the two outer frame plates (11) can be pushed and rotated to move closer to or away from each other, so that the two outer frame plates (11) can just adapt to the two adjacent pit surfaces of the foundation pit, and the second positioner (7) can provide constraint and limit for the two outer frame plates (11), and the outer frame plates (11) support the wall; Step 3: When the two outer frame plates (11) are respectively attached to the two walls of the foundation pit, the Y-shaped rod (55) is overlapped on the tray (56). The Y-shaped rod (55) can rotate in any direction on the horizontal plane around the rotating rod (6). By rotating the internal threaded sleeve (53), the internal threaded sleeve (53) can move on the outer wall of the screw rod (54), so that the push block (52) at the other end of the internal threaded sleeve (53) extends to the fixed seat (51) and is aligned with the inner insert plate (12). At the connection, the push block (52) contacts the fixed seat (51). At this time, the total length of the internal threaded sleeve (53) and the screw rod (54) is continuously extended, and the push block (52) can push the fixed seat (51), so that the inner insert plate (12) extends from the inside of the outer frame plate (11). Therefore, the extension distance of the inner insert plate (12) can be adjusted according to the length of the wall to be supported, and the two outer frame plates (11) are further supported and limited by the first positioner (5); Step 4: After the position adjustment of the two outer frame plates (11) is completed, the threaded rod (84) is turned, and the extrusion slideway (86) is pushed by the threaded rod (84), so that the extrusion slideway (86) drives the horizontal bar (82) fixed thereto to deflect, and the extrusion slideway (86) and the threaded rod (84) slide relative to each other. Under the action of the right-angle piece (83), the right-angle piece (83) rotates on the top of the installation box (92), and the four horizontal bars (82) deflect synchronously and approach each other. The horizontal bar (82) pushes the movable rod (89) in contact with it, so that the spring between the positioning block (87) and the guide sleeve (88) is stretched, and the movable rod (89) drives the positioning block (87) to be inserted into the side wall of the side hole fixing plate (81), so that the four positioning blocks (87) and the horizontal bar (82) synchronously lock the position of the side hole fixing plate (81), preventing the side hole fixing plate (81) and the rotating rod (6) from rotating, thereby further improving the support stability; Step 5: When the foundation pit is deep, a heightening plate (3) can be installed on the top of the outer frame plate (11). According to the extension length of the inner insert plate (12) inside the outer frame plate (11), the extension plate (33) is extended accordingly, and the side support (1) and the heightening plate (3) are assembled up and down through the insert column (34) and the insert hole (14); Step 6: When the device is to be stored, the first positioner (5) is disassembled, and the rotating rod (6) is rotated by the driving mechanism (9). Under the pull of the second positioner (7), the two outer frame plates (11) are turned over and approach each other. As the two outer frame plates (11) gradually approach each other, the first gear ring (71) together with the guide frame (79) at its bottom passes through the inside of the first through groove (16), and the second gear ring (76) passes through the inside of the second through groove (17), so that the second positioner (7) will not hinder the two outer frame plates (11) from approaching each other, thereby facilitating the storage and transportation of the entire device.

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