Foundation pit supporting structure and construction method thereof

Abstract

The application discloses a foundation pit supporting structure and a construction method thereof. The foundation pit supporting structure comprises a base, a plurality of moving wheels are installed on the base, a sliding groove is formed in the base, and a sliding plate is slidably arranged in the sliding groove. A supporting plate is rotatably arranged on the sliding plate, the supporting plate can be matched with a pit wall of a foundation pit, a slot is formed in the sliding plate to allow the supporting plate to rotate, a bottom plate is rotatably arranged on the supporting plate, and the bottom plate can be matched with a pit bottom of the foundation pit. A plurality of supporting assemblies are arranged on the base to support the base, a driving mechanism is arranged on the base to drive the sliding plate to move, a driving component is arranged on the sliding plate to drive the supporting plate to rotate, and a rotating mechanism is arranged on the supporting plate to drive the bottom plate to rotate and automatically lock. The application can reduce the labor intensity of operators.

Description

Technical Field

[0001] This invention relates to the technical field of foundation pit support, and in particular to a foundation pit support structure and its construction method. Background Technology

[0002] When construction is carried out in a foundation pit, in order to ensure the safety of underground structure construction and construction personnel in the foundation pit, foundation pit support structures are often used to protect the foundation pit, that is, the support, reinforcement and protection measures adopted for the side walls of the foundation pit and the surrounding environment.

[0003] For prior art, refer to Chinese Patent No. CN215329926U, which discloses a foundation pit support structure and foundation pit support components, including a fixed base with a movable groove. A column is movably connected to the inner wall of the movable groove. A threaded sleeve is movably connected between the two sides of the inner cavity of the column via bearings. A driven bevel gear is fixedly connected to the threaded sleeve. A handwheel is provided on the column, and a rotating rod is fixedly connected to the handwheel. The side of the rotating rod away from the handwheel passes through the inner cavity of the column and is fixedly connected to a driving bevel gear. The driving bevel gear meshes with the driven bevel gear. The threaded sleeve... The inner cavity is threaded with a threaded rod, and a support plate is movably connected to the fixed seat. A fixed plate is set on the support plate, and mounting plates are fixedly connected to the front and rear sides of the fixed plate. A fixing bolt is set on the right side of the mounting plate, and the fixing bolt passes through the mounting plate and is threadedly connected to the support plate. A through groove is opened at the bottom of the fixed plate, and an adjusting plate is set in the inner cavity of the through groove. A support block is fixedly connected to the adjusting plate. The side of the threaded rod away from the threaded sleeve passes through the column and is movably connected to the support block through a pin. Support protrusions are fixedly connected to the top and bottom of the left side of the support plate.

[0004] However, when the foundation pit support structure in the aforementioned patent supports the foundation pit, it is necessary to first transport the foundation pit support structure to the inside of the foundation pit by crane, and then have it manually installed by operators. This operation is quite cumbersome, thereby increasing the labor intensity of the operators. Summary of the Invention

[0005] In order to reduce the labor intensity of operators, this application provides a foundation pit support structure, which adopts the following technical solution:

[0006] A foundation pit support structure includes a base with multiple casters mounted on it. A sliding groove is formed on the base, and a sliding plate is slidably disposed within the sliding groove. A support plate is rotatably disposed on the sliding plate, capable of engaging with the pit wall. A clearance groove is formed on the sliding plate for the support plate to rotate. A bottom plate is rotatably disposed on the support plate, capable of engaging with the pit bottom. Multiple support components are provided on the base for supporting the base. A drive mechanism is provided on the base for moving the sliding plate. A drive component is provided on the sliding plate for rotating the support plate. A rotation mechanism is provided on the support plate for rotating the bottom plate and automatically locking it.

[0007] By adopting the above technical solution, when it is necessary to support the foundation pit, the base is first moved to a position close to the foundation pit by multiple moving wheels, and then the base is moved vertically upward by multiple support components. When the moving wheels are separated from the ground, the stability of the base can be improved. Then, the support plate is driven to rotate by the drive component. When the support plate is flipped to the top position of the foundation pit wall, the support plate is in an inclined state. Then, the sliding plate is driven to move towards the foundation pit by the drive mechanism. The sliding plate drives the support plate to move, and the support plate gradually tends to be perpendicular to the ground. When the support plate is perpendicular to the ground, the bottom plate is driven to rotate to the bottom of the foundation pit by the rotation mechanism and automatically locked. This facilitates the support of the foundation pit and reduces the labor intensity of the operators.

[0008] Preferably, the support assembly includes a support block, which is fixedly connected to one side of the base. A hydraulic cylinder is mounted on the support block, and a pad is fixedly connected to the piston rod of the hydraulic cylinder. The pad can cooperate with the ground.

[0009] By adopting the above technical solution, when the base needs to be supported, the piston rod driven by the hydraulic cylinder moves downward in the vertical direction, and the piston rod of the hydraulic cylinder drives the pad block to move downward in the vertical direction, which makes it easier to drive the base to move upward in the vertical direction, and thus makes it easier to support the base.

[0010] Preferably, the driving mechanism includes a driving block, which is fixedly connected to the sliding plate. A driving groove is formed on one side wall of the sliding groove, and the driving block is slidably disposed on the inner wall of the driving groove. A first lead screw is rotatably disposed in the driving groove, and the first lead screw is threadedly engaged with the driving block. A first motor is mounted on the base, and the output shaft of the first motor is fixedly connected to the lead screw. A guide assembly for guiding the sliding plate is provided on the base.

[0011] By adopting the above technical solution, when it is necessary to drive the sliding plate to move in the horizontal direction, the first motor is started to drive the output shaft to rotate, the output shaft of the first motor drives the first lead screw to rotate, the first lead screw drives the drive block to move in the horizontal direction, and at the same time, under the guidance of the guide assembly on the sliding plate, it is easy to drive the sliding plate to move in the horizontal direction.

[0012] Preferably, the guiding assembly includes a guide rod, a guide groove is formed on one side wall of the sliding groove, a guide block is slidably disposed in the guide groove, the guide block is fixedly connected to the sliding plate, the guide rod is fixedly connected to the inner wall of the guide groove, and the guide rod and the guide block are slidably engaged.

[0013] By adopting the above technical solution, when it is necessary to guide the sliding plate, the setting of guide rod and guide block can reduce the possibility of the sliding plate deviating, thereby facilitating the guiding function of the sliding plate.

[0014] Preferably, the driving component includes a first hinge block and a second hinge block, both of which are disposed on the sliding plate; a rotating shaft is sleeved and fixed on the support plate, with both ends of the rotating shaft rotatably disposed on the opposite inner sides of the first hinge block and the second hinge block, respectively; a second motor for driving the rotating shaft to rotate is mounted on the first hinge block.

[0015] By adopting the above technical solution, when it is necessary to drive the support plate to rotate, the second motor is started to drive the output shaft to rotate, and the output shaft of the second motor drives the rotating shaft to rotate, thereby facilitating the rotation of the support plate.

[0016] Preferably, the rotating mechanism includes a connecting rod, a storage groove is provided on the side of the support plate near the bottom plate, a sliding block is slidably disposed in the storage groove, one end of the connecting rod is hinged to the side of the bottom plate near the support plate, the other end of the connecting rod is hinged to the sliding block, and a driving component for driving the sliding block to move and automatically locking is provided on the support plate.

[0017] By adopting the above technical solution, when it is necessary to drive the base plate to rotate to the bottom of the pit and lock it, the sliding block is first driven to move along the length of the support plate by the drive component. The sliding block drives the base plate to rotate through the connecting rod. When the base plate rotates to the bottom of the pit, the sliding block automatically locks, which makes it easy to drive the base plate to rotate to the bottom of the pit and lock it.

[0018] Preferably, the driving assembly includes a second lead screw, which is rotatably disposed on the inner wall of the storage slot, and the second lead screw is threadedly engaged with the sliding block; the support plate is provided with a rotating component for driving the second lead screw to rotate.

[0019] By adopting the above technical solution, when it is necessary to drive the sliding block to move along the length of the support plate, the rotating component drives the second lead screw to rotate, and the second lead screw drives the sliding block to move along the length of the support plate, thereby facilitating the movement of the sliding block and automatically locking it.

[0020] Preferably, the rotating component includes a guide rod, and a mounting groove is provided on one side wall of the storage slot. The guide rod is rotatably mounted on the inner wall of the mounting groove. The guide rod is fixedly connected to the second lead screw. A rotating block is sleeved and fixed on the guide rod. A torsion spring is sleeved on the guide rod. One end of the torsion spring is fixedly connected to the rotating block, and the other end of the torsion spring is fixedly connected to the inner wall of the mounting groove. A limiting groove is provided on the rotating block, and a limiting block is slidably disposed in the mounting groove. The limiting block can be inserted into the inner wall of the limiting groove. A separation component is provided on the support plate for driving the limiting block to separate from the limiting groove.

[0021] By adopting the above technical solution, when it is necessary to drive the second lead screw to rotate, the limiting block is first driven to separate from the limiting groove by the separating component. At this time, the rotating block rotates under the elastic force of the torsion spring, and the rotating block drives the guide rod to rotate, which makes it easier to drive the second lead screw to rotate.

[0022] Preferably, the separating component includes an abutment block, and a groove is formed on the side of the support plate away from the rotating shaft. The abutment block is slidably disposed on the inner wall of the groove and can abut against the bottom of the pit. A first spring is disposed in the groove, one end of the first spring is fixedly connected to the inner wall of the groove, and the other end of the first spring is fixedly connected to the abutment block. A drive rod is fixedly connected to the abutment block, the end of the drive rod away from the abutment block is disposed through the groove, and the end of the drive rod away from the abutment block is fixedly connected to the limiting block.

[0023] By adopting the above technical solution, when the support plate abuts against the bottom of the pit, the abutting block abuts against the ground and moves upward in the vertical direction. The abutting block drives the drive rod to move upward in the vertical direction, and the drive rod drives the limiting block to move upward in the vertical direction, thereby facilitating the separation of the driving limiting block from the limiting groove.

[0024] This application provides a foundation pit support construction method, which adopts the following technical solution:

[0025] S1: The base is moved to a location close to the foundation pit via multiple movable wheels;

[0026] S2: The base is supported by the support components;

[0027] S3: Drive the support plate to rotate to the top position of the pit wall through the drive component;

[0028] S4: Drive the sliding plate to move towards the pit via the drive mechanism;

[0029] S5: When the support plate is perpendicular to the ground and abuts against the bottom of the pit, the bottom plate is driven to rotate to the bottom of the pit by the rotating mechanism and automatically locked.

[0030] In summary, this application has the following beneficial effects:

[0031] 1. When it is necessary to support the foundation pit, the base is first moved to a position close to the foundation pit by multiple moving wheels. Then, the base is moved vertically upward by multiple support components. When the moving wheels are separated from the ground, the stability of the base can be improved. Then, the support plate is rotated by the drive component. When the support plate is flipped to the top of the foundation pit wall, the support plate is in an inclined state. Then, the sliding plate is moved towards the foundation pit by the drive mechanism. The sliding plate drives the support plate to move. At this time, the support plate gradually tends to be perpendicular to the ground. When the support plate is perpendicular to the ground, the bottom plate is rotated to the bottom of the foundation pit by the rotation mechanism and automatically locked. This facilitates the support of the foundation pit and reduces the labor intensity of the operators.

[0032] 2. When the base needs to be supported, the piston rod is driven by the hydraulic cylinder to move downward in the vertical direction. The piston rod of the hydraulic cylinder drives the pad block to move downward in the vertical direction, which makes it easier to drive the base to move upward in the vertical direction, thus making it easier to support the base.

[0033] 3. When it is necessary to drive the sliding plate to move horizontally, the first motor is started to drive the output shaft to rotate. The output shaft of the first motor drives the first lead screw to rotate. The first lead screw drives the drive block to move horizontally. At the same time, under the guidance of the guide assembly, the sliding plate can be easily driven to move horizontally. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0035] Figure 2 This is a schematic diagram of the working state of the support structure in this invention;

[0036] Figure 3 This is a cross-sectional view showing the guide rod in this invention;

[0037] Figure 4 This is a cross-sectional view showing the vertical groove in this invention;

[0038] Figure 5 yes Figure 4 A magnified view of a section at point A in the middle;

[0039] Figure 6This is a cross-sectional view of the display driving component in this invention;

[0040] Figure 7 yes Figure 6 A magnified view of a portion of point A in the middle.

[0041] Explanation of reference numerals in the attached drawings: 1. Base; 11. Moving wheel; 12. Sliding groove; 13. Sliding plate; 14. Support plate; 15. Clearance groove; 16. Base plate; 2. Support assembly; 21. Support block; 22. Hydraulic cylinder; 23. Pad block; 3. Drive mechanism; 311. Drive block; 312. Drive groove; 313. First lead screw; 314. First motor; 32. Guide assembly; 321. Guide rod; 322. Guide groove; 323. Guide block; 4. Drive component; 411. First hinge block; 412. Rotating shaft; 413. Second motor; 421. Vertical groove; 422. First slider; 423. Second slider; 424. Square groove; 425. Square block; 426. Rotary... 427. Moving groove; 428. Second spring; 431. Third spring; 432. First inclined block; 433. Second inclined block; 434. Linkage block; 435. Fourth spring; 436. First inclined surface; 437. Second inclined surface; 438. Third inclined surface; 439. Fourth inclined surface; 5. Rotating mechanism; 511. Connecting rod; 512. Storage groove; 513. Sliding block; 52. Drive assembly; 521. Second lead screw; 53. Rotating component; 531. Smooth rod; 532. Mounting groove; 533. Rotating block; 534. Torsion spring; 535. Limiting groove; 536. Limiting block; 54. Separator; 541. Abutment block; 542. Slide groove; 543. First spring; 544. Drive rod. Detailed Implementation

[0042] This invention discloses a foundation pit support structure, such as... Figure 1 and Figure 2As shown, the system includes a square base 1. Four casters 11 are bolted to the bottom of the base 1. A sliding groove 12 is formed on the upper surface of the base 1. The sliding groove 12 has a square cross-section and extends vertically. A square sliding plate 13 is slidably disposed within the sliding groove 12 along the length of the base 1. A square support plate 14 is rotatably disposed on the sliding plate 13. The support plate 14 is square and can cooperate with the pit wall. A clearance groove is formed on the sliding plate 13 to allow the support plate 14 to rotate. 15. The cross-section of the clearance groove 15 is square and extends vertically. A base plate 16 is rotatably mounted on the support plate 14. The base plate 16 is square and can cooperate with the bottom of the pit. The base 1 is provided with multiple support components 2 for supporting the base 1. The base 1 is provided with a drive mechanism 3 for driving the sliding plate 13 to move. The sliding plate 13 is provided with a drive component 4 for driving the support plate 14 to rotate. The support plate 14 is provided with a rotation mechanism 5 for driving the base plate 16 to rotate and automatically locking.

[0043] When it is necessary to support the foundation pit, the base 1 is first moved to a position close to the foundation pit by multiple moving wheels 11, and then the base 1 is moved vertically upward by multiple support components 2. When the moving wheels 11 are separated from the ground, the stability of the base 1 can be improved. Then, the support plate 14 is driven to rotate by the drive component 4. When the support plate 14 is flipped to the top position of the foundation pit wall, the support plate 14 is in an inclined state. Then, the sliding plate 13 is driven to move towards the foundation pit by the drive mechanism 3. The sliding plate 13 drives the support plate 14 to move. At this time, the support plate 14 gradually tends to be perpendicular to the ground. When the support plate 14 is perpendicular to the ground, the bottom plate 16 is driven to rotate to the bottom of the foundation pit by the rotation mechanism 5 and automatically locked. This facilitates the support of the foundation pit and reduces the labor intensity of the operators.

[0044] like Figure 1 As shown, the support assembly 2 includes a support block 21 with a square cross-section. The support block 21 is fixedly connected to one side of the base 1. A hydraulic cylinder 22 is bolted onto the support block 21. The piston rod of the hydraulic cylinder 22 is set vertically downward. A pad 23 is fixedly connected to the piston rod of the hydraulic cylinder 22. The pad 23 is disc-shaped and can cooperate with the ground.

[0045] When it is necessary to support the base 1, the piston rod is driven by the hydraulic cylinder 22 to move downward in the vertical direction. The piston rod of the hydraulic cylinder 22 drives the pad block 23 to move downward in the vertical direction, which makes it easier to drive the base 1 to move upward in the vertical direction, thereby making it easier to support the base 1.

[0046] like Figure 3As shown, the drive mechanism 3 includes a drive block 311, which is square in shape and fixedly connected to one side of the sliding plate 13. A drive groove 312 is formed on one side wall of the sliding groove 12 near the drive block 311. The cross-section of the drive groove 312 is square and extends along the length direction of the base 1. The drive block 311 is slidably disposed on the inner wall of the drive groove 312 along the length direction of the base 1. A first lead screw 313 is disposed in the drive groove 312. The first lead screw 313 is disposed along the length direction of the base 1 and passes through the drive block 311. The first lead screw 313 is threadedly engaged with the drive block 311. A first motor 314 is bolted to one side of the base 1. One end of the first lead screw 313 is fixedly connected to the output shaft of the first motor 314, and the other end of the first lead screw 313 is rotatably disposed on the inner wall of the drive groove 312 through a bearing. A guide assembly 32 for guiding the sliding plate 13 is disposed on the base 1.

[0047] When it is necessary to drive the sliding plate 13 to move horizontally, the first motor 314 is started to drive the output shaft to rotate. The output shaft of the first motor 314 drives the first lead screw 313 to rotate. The first lead screw 313 drives the drive block 311 to move horizontally. At the same time, under the guidance of the guide assembly 32, the sliding plate 13 can be easily driven to move horizontally.

[0048] like Figure 3 As shown, the guide assembly 32 includes a guide rod 321 with a circular cross-section, which is positioned along the length of the base 1. A guide groove 322 is formed on one side wall of the sliding groove 12, with a square cross-section extending along the length of the base 1. A guide block 323, square in shape, is slidably disposed within the guide groove 322 along the length of the base 1. The guide block 323 is fixedly connected to the side of the sliding plate 13 away from the drive block 311. Both ends of the guide rod 321 are fixedly connected to the inner wall of the guide groove 322. The guide rod 321 passes through the guide block 323, and the guide rod 321 and guide block 323 slide together along the length of the base 1. When it is necessary to guide the sliding plate 13, the guide rod 321 and guide block 323 help reduce the possibility of the sliding plate 13 shifting, thus facilitating its guiding function.

[0049] like Figure 3As shown, the driving component 4 includes a first hinge block 411 and a second hinge block, both of which are disposed on the upper surface of the sliding plate 13. A rotating shaft 412 is sleeved and fixed on the support plate 14. The rotating shaft 412 has a circular cross-section, and its two ends are rotatably disposed on the opposite inner sides of the first hinge block 411 and the second hinge block, respectively. A second motor 413 for driving the rotating shaft 412 to rotate is mounted on the first hinge block 411, and the second motor 413 is bolted to the first hinge block 411. When it is necessary to drive the support plate 14 to rotate, the second motor 413 is started to drive the output shaft to rotate, and the output shaft of the second motor 413 drives the rotating shaft 412 to rotate, thereby facilitating the rotation of the support plate 14.

[0050] like Figure 4 and Figure 5 As shown, a vertical groove 421 is provided on the sliding plate 13. A first slider 422 and a second slider 423 are slidably disposed in the vertical groove 421 along the width direction of the sliding plate 13. The first slider 422 is fixedly connected to the bottom of the first hinge block 411, and the second slider 423 is fixedly connected to the bottom of the second hinge block. A square groove 424 is provided on the side of the output shaft of the second motor 413 near the rotating shaft 412. A square block 425 is fixedly connected to the end of the rotating shaft 412 near the second motor 413. The square block 425 is inserted into the inner wall of the square groove 424. The second hinge block has a rotating groove 426, and the end of the rotating shaft 412 away from the square block 425 is movably connected to the inner wall of the rotating groove 426; the first slider 422 is provided with a second spring 427, one end of the second spring 427 is fixedly connected to the first slider 422, and the other end of the second spring 427 is fixedly connected to the inner wall of the vertical groove 421; the second slider 423 is provided with a third spring 428, one end of the third spring 428 is fixedly connected to the second slider 423, and the other end of the third spring 428 is fixedly connected to the inner wall of the vertical groove 421.

[0051] like Figure 4 and Figure 5As shown, a first inclined block 431 is fixedly connected to the first slider 422, a second inclined block 432 is fixedly connected to the second slider 423, a linkage block 433 is provided on the sliding plate 13, the linkage block 433 can abut against the support plate 14, the linkage block 433 is slidably disposed on the inner wall of the vertical groove 421 along the length direction of the support plate 14, two fourth springs 434 are provided in the vertical groove 421, one end of the fourth spring 434 is fixedly connected to the linkage block 433, and the other end of the fourth spring 434 is fixedly connected to the inner wall of the vertical groove 421; a first inclined surface 435 is provided on the first inclined block 431, a second inclined surface 436 is provided on the linkage block 433, the first inclined surface 435 can cooperate with the second inclined surface 436, a third inclined surface 437 is provided on the second inclined block 432, and a fourth inclined surface 438 is provided on the linkage block 433, the third inclined surface 437 and the fourth inclined surface 438 can cooperate.

[0052] like Figure 6 As shown, the rotating mechanism 5 includes a connecting rod 511 with a square cross-section. A storage groove 512 is provided on the side of the support plate 14 near the bottom plate 16. The storage groove 512 has a square cross-section and extends vertically. A sliding block 513 is slidably disposed in the storage groove 512 along the vertical direction. The sliding block 513 is square. One end of the connecting rod 511 is hinged to the side of the bottom plate 16 near the support plate 14, and the other end of the connecting rod 511 is hinged to the left side of the sliding block 513. A drive assembly 52 is provided on the support plate 14 for driving the sliding block 513 to move vertically and automatically locking it.

[0053] When it is necessary to drive the base plate 16 to rotate to the bottom of the pit and lock it, the sliding block 513 is first driven to move along the length of the support plate 14 through the drive assembly 52. ​​The sliding block 513 drives the base plate 16 to rotate through the connecting rod 511. When the base plate 16 rotates to the bottom of the pit, the sliding block 513 automatically locks, which makes it easy to drive the base plate 16 to rotate to the bottom of the pit and lock it.

[0054] like Figure 6 As shown, the drive assembly 52 includes a second lead screw 521, which is arranged vertically. Both ends of the second lead screw 521 are rotatably mounted on the inner wall of the storage groove 512 via bearings. The second lead screw 521 passes through the sliding block 513 and is threadedly engaged with the sliding block 513. The support plate 14 is provided with a rotating component 53 for driving the second lead screw 521 to rotate.

[0055] When it is necessary to drive the sliding block 513 to move along the length of the support plate 14, the rotating component 53 drives the second lead screw 521 to rotate, and the second lead screw 521 drives the sliding block 513 to move along the length of the support plate 14, thereby facilitating the movement of the sliding block 513 and automatically locking it.

[0056] like Figure 6 and Figure 7 As shown, the rotating component 53 includes a smooth rod 531 with a circular cross-section and arranged vertically. A mounting groove 532 is provided on one side wall of the storage slot 512, extending vertically. The bottom end of the smooth rod 531 is rotatably mounted on the inner wall of the mounting groove 532 via a bearing. The top end of the smooth rod 531 is fixedly connected to the second lead screw 521. A rotating block 533, shaped like a disc, is sleeved and fixed on the smooth rod 531. A torsion spring 534, arranged vertically, is also sleeved on the smooth rod 531. One end of the torsion spring 534 is fixedly connected to the rotating block 533, and the other end of the torsion spring 534 is fixedly connected to the inner wall of the mounting groove 532. A limiting groove 535 is provided on the rotating block 533. The limiting groove 535 has a square cross-section and extends vertically. A limiting block 536 is slidably arranged in the mounting groove 532 in the vertical direction. The limiting block 536 has a square cross-section and can be inserted into the inner wall of the limiting groove 535. A separating member 54 is provided on the support plate 14 for driving the limiting block 536 to separate from the limiting groove 535.

[0057] When it is necessary to drive the second lead screw 521 to rotate, the limiting block 536 is first driven to separate from the limiting groove 535 through the separating member 54. At this time, the rotating block 533 rotates under the elastic force of the torsion spring 534. The rotating block 533 drives the guide rod 531 to rotate, which makes it easier to drive the second lead screw 521 to rotate.

[0058] like Figure 6 and Figure 7 As shown, the separating component 54 includes an abutment block 541, which is square in shape. A groove 542 is provided on the side of the support plate 14 away from the rotating shaft 412. The groove 542 has a square cross-section and extends vertically. The abutment block 541 is slidably disposed on the inner wall of the groove 12 in the vertical direction. The abutment block 541 can abut against the bottom of the pit. A first spring 543 is disposed in the groove 542. The first spring 543 is disposed vertically. One end of the first spring 543 is fixedly connected to the inner wall of the groove 542, and the other end of the first spring 543 is fixedly connected to the abutment block 541. A drive rod 544 is fixedly connected to the abutment block 541. The drive rod 544 has a circular cross-section and is disposed vertically. The end of the drive rod 544 away from the abutment block 541 passes through the groove 542, and the end of the drive rod 544 away from the abutment block 541 is fixedly connected to the bottom of the limiting block 536.

[0059] When the support plate 14 abuts against the bottom of the pit, the abutting block 541 abuts against the ground and moves upward in the vertical direction. The abutting block 541 drives the drive rod 544 to move upward in the vertical direction, and the drive rod 544 drives the limiting block 536 to move upward in the vertical direction, thereby facilitating the separation of the driving limiting block 536 from the limiting groove 535.

[0060] This application also discloses a method for constructing foundation pit support, including the following steps:

[0061] S1: The base 1 is moved to a position close to the foundation pit by multiple moving wheels 11;

[0062] S2: The base 1 is supported by the support component 2;

[0063] S3: Drive the support plate 14 to rotate to the top position of the pit wall through the drive component 4;

[0064] S4: Drive the sliding plate 13 to move towards the pit via the drive mechanism 3;

[0065] S5: When the support plate 14 is perpendicular to the ground and abuts against the bottom of the pit, the base plate 16 is driven to rotate to the bottom of the pit by the rotating mechanism 5 and automatically locked.

[0066] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A foundation pit support structure characterized by: The utility model provides a base (1) is installed with a plurality of mobile wheels (11) on it, is seted up with the sliding groove (12) on the base (1), the sliding plate (13) is slidably arranged in the sliding groove (12), the supporting plate (14) is rotatably arranged on the sliding plate (13), the supporting plate (14) can cooperate with the pit wall of foundation pit, the sliding plate (13) is seted up with the accommodation groove (15) for the rotation of supporting plate (14), the bottom plate (16) is rotatably arranged on the supporting plate (14), and the bottom plate (16) can cooperate with the pit bottom of foundation pit, a plurality of support assemblies (2) for supporting the base (1) are arranged on the base (1), a drive mechanism (3) for driving the sliding plate (13) to move is arranged on the base (1), a drive component (4) for driving the supporting plate (14) to rotate is arranged on the sliding plate (13), and a rotating mechanism (5) for driving the bottom plate (16) to rotate and automatically locking is arranged on the supporting plate (14).

2. A foundation pit support structure according to claim 1, wherein: The support assembly (2) includes a support block (21) fixedly connected to one side of the base (1), a hydraulic cylinder (22) mounted on the support block (21), and a pad (23) fixedly connected to the piston rod of the hydraulic cylinder (22), which can cooperate with the ground.

3. A foundation pit support structure according to claim 1, wherein: The drive mechanism (3) includes a drive block (311) fixedly connected to the sliding plate (13), a drive groove (312) formed in one side wall of the sliding groove (12), and the drive block (311) slidably arranged on the inner wall of the drive groove (312); a first lead screw (313) rotatably arranged in the drive groove (312), the first lead screw (313) threadedly cooperating with the drive block (311), a first motor (314) mounted on the base (1), the output shaft of the first motor (314) fixedly connected with the first lead screw (313), and a guide assembly (32) arranged on the base (1) for guiding the sliding plate (13).

4. A retaining structure according to claim 3, wherein: The guide assembly (32) includes a guide rod (321), a guide groove (322) formed in one side wall of the sliding groove (12), a guide block (323) slidably arranged in the guide groove (322), the guide block (323) fixedly connected with the sliding plate (13), the guide rod (321) fixedly connected to the inner wall of the guide groove (322), and the guide rod (321) slidably cooperating with the guide block (323).

5. A retaining structure according to claim 1 wherein: The driving component (4) comprises a first hinged block (411) and a second hinged block, both of which are arranged on the sliding plate (13); a rotating shaft (412) is fixedly sleeved on the supporting plate (14), and both ends of the rotating shaft (412) are rotationally arranged on the opposite inner sides of the first hinged block (411) and the second hinged block, and the first hinged block (411) is provided with a second motor (413) for driving the rotating shaft (412) to rotate.

6. A retaining structure according to claim 5 wherein: The rotating mechanism (5) comprises a connecting rod (511), the supporting plate (14) is provided with a storage groove (512) on one side close to the bottom plate (16), a sliding block (513) is slidably arranged in the storage groove (512), one end of the connecting rod (511) is hinged to one side of the bottom plate (16) close to the supporting plate (14), the other end of the connecting rod (511) is hinged to the sliding block (513), and the supporting plate (14) is provided with a driving assembly (52) for driving the sliding block (513) to move and automatically lock.

7. A retaining structure according to claim 6 wherein: The driving assembly (52) comprises a second screw rod (521), the second screw rod (521) is rotationally arranged on the inner wall of the storage groove (512), and the second screw rod (521) is threadedly connected with the sliding block (513); the supporting plate (14) is provided with a rotating component (53) for driving the second screw rod (521) to rotate.

8. A retaining structure according to claim 7, wherein: The rotating component (53) comprises a light rod (531), one side wall of the storage groove (512) is provided with a mounting groove (532), the light rod (531) is rotationally arranged on the inner wall of the mounting groove (532), the light rod (531) is fixedly connected with the second screw rod (521), a rotating block (533) is fixedly sleeved on the light rod (531), a torsion spring (534) is sleeved on the light rod (531), one end of the torsion spring (534) is fixedly connected with the rotating block (533), the other end of the torsion spring (534) is fixedly connected with the inner wall of the mounting groove (532), the rotating block (533) is provided with a limiting groove (535), the mounting groove (532) is slidably provided with a limiting block (536), the limiting block (536) can be inserted into the inner wall of the limiting groove (535), and the supporting plate (14) is provided with a separating piece (54) for driving the limiting block (536) to separate from the limiting groove (535).

9. A retaining structure according to claim 8, wherein: The separating piece (54) comprises an abutting block (541), a sliding groove (542) is formed on the side of the supporting plate (14) away from the rotating shaft (412), the abutting block (541) is slidingly arranged on the inner wall of the sliding groove (542), the abutting block (541) can abut on the bottom of the foundation pit, a first spring (543) is arranged in the sliding groove (542), one end of the first spring (543) is fixedly connected to the inner wall of the sliding groove (542), and the other end of the first spring (543) is fixedly connected to the abutting block (541); a driving rod (544) is fixedly connected to the abutting block (541), the driving rod (544) is arranged to penetrate through the sliding groove (542) away from the abutting block (541), and one end of the driving rod (544) away from the abutting block (541) is fixedly connected to the limiting block (536).

10. A method for construction of a foundation pit support, based on the foundation pit support structure according to any one of claims 1-9, characterized in that: The construction steps comprise the following steps: S1: the base (1) is driven to move close to the foundation pit through the plurality of moving wheels (11); S2: the base (1) is supported through the supporting assembly (2); S3: the supporting plate (14) is driven to rotate to the top position of the foundation pit wall through the driving part (4); S4: the sliding plate (13) is driven to move towards the direction close to the foundation pit through the driving mechanism (3); S5: when the supporting plate (14) is perpendicular to the ground and abuts on the bottom of the foundation pit, the bottom plate (16) is driven to rotate to the bottom of the foundation pit through the rotating mechanism (5), and is automatically locked.

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