A foundation pit asymmetric excavation anti-deformation device and a method for using the same

Abstract

The application discloses a foundation pit asymmetric excavation anti-deformation device and a use method thereof. The foundation pit asymmetric excavation anti-deformation device comprises an excavation anti-deformation device body arranged above a foundation to be excavated. The excavation anti-deformation device body comprises a back-shaped top plate, and the top of the back-shaped top plate is fixedly connected with a back-shaped seat. The application is provided with a series of structures, which can flexibly adjust the spacing and limiting slope of the two limiting plates according to the asymmetric foundation pit excavation requirements of different slopes on both sides, improve the applicability and use flexibility, facilitate the driving of the two limiting plates to vibrate and move downward and insert into the foundation to be excavated before excavation to perform the limiting and anti-collapse deformation work on both sides, can directly limit the anti-collapse deformation on both sides during excavation, improve the use effect, and facilitate the direct measurement of the slope of the limiting plate during rotation adjustment, facilitate the accurate control of the excavation slope of the asymmetric foundation pit by the personnel, and improve the accuracy of the limiting excavation work.

Description

Technical Field

[0001] This invention relates to the field of anti-deformation technology for asymmetric excavation of foundation pits, specifically to an anti-deformation device for asymmetric excavation of foundation pits and its usage method. Background Technology

[0002] Asymmetrical foundation pits are those with slopes differing on both sides, such as existing canal pits and ground beam pits with slopes on both sides. During excavation of such asymmetrical foundation pits, especially in areas with loose geology, the soil on both sides is prone to collapse and deform inwards due to its looseness. Current methods often involve temporary support using scaffolding after excavation, which is then removed piecemeal and reinforced with concrete in sections after further excavation. However, this post-excavation support method has the following drawbacks:

[0003] When the geology is loose, the phenomenon of inward collapse and deformation on both sides will occur directly during the excavation process. It is necessary to clean up the area before support work can be carried out. It is not possible to directly restrict the collapse and deformation on both sides during excavation, and the effect is not ideal.

[0004] When using mutual constraints on both sides, the slope of the constraints on both sides cannot be flexibly adjusted according to the excavation requirements of different slopes on both sides of the asymmetrical foundation pit, resulting in unsatisfactory applicability and flexibility of use. Summary of the Invention

[0005] The present invention proposes an anti-deformation device for asymmetric excavation of foundation pits and its usage method, which solves the problems of not being able to directly restrict the collapse and deformation on both sides during excavation and not being able to flexibly adjust the limiting slope on both sides according to the excavation requirements of different slopes on both sides of the asymmetric foundation pit.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an anti-deformation device for asymmetric excavation of foundation pit, comprising an excavation anti-deformation device body disposed above the foundation to be excavated, the excavation anti-deformation device body comprising a U-shaped top plate, a U-shaped seat fixedly connected to the top of the U-shaped top plate, and a vibration motor fixedly connected to the top of the U-shaped seat, wherein a hard vibration force is provided to the U-shaped top plate through the U-shaped seat when the vibration motor is started.

[0007] A dual-axis motor is fixedly connected to the bottom of the U-shaped base. Two threaded drive assemblies are installed on the U-shaped top plate. The near ends of the two threaded drive assemblies are fixedly connected to the opposing ends of the two output shafts of the dual-axis motor. A movable seat is fixedly connected to the bottom of the threaded drive assembly. The threaded drive assembly is used to drive the two movable seats to move close to or repulsively when the dual-axis motor is started.

[0008] The bottom of the movable seat is hinged with a support rod, and the bottom end of the support rod is fixedly connected to a U-shaped plate. The two U-shaped plates are respectively hinged to the bottom of the corresponding movable seats on opposite sides, and inclined electric telescopic rods are installed. The bottom of the U-shaped plate is equipped with a vertical insertion retaining anti-excavation deformation component. The top inner wall of the U-shaped plate is fixedly installed with a drive motor whose output shaft is fixedly connected to the vertical insertion retaining anti-excavation deformation component. The electric telescopic rod drives the corresponding U-shaped plate to rotate and tilt. The two vertical insertion retaining anti-excavation deformation components are used to adjust the retaining anti-deformation distance when the two movable seats move close to or opposite to each other, and to flexibly adjust the retaining slope according to the retaining anti-deformation slope when the U-shaped plate tilts. The two sides can be adjusted independently, which can be used for asymmetric foundation pit retaining work with different slopes on both sides, and to insert into the foundation to be excavated for retaining work when the top plate of the U-shaped plate is hard vibrated and the drive motor is started. The retaining on both sides can prevent the phenomenon of side collapse and deformation caused by loose geology during excavation.

[0009] Vertical elastic support components are fixedly connected to both sides of the bottom of the U-shaped top plate, which are used to provide vertical flexible support for the U-shaped top plate.

[0010] Preferably, the threaded drive assembly includes horizontal screws, with the opposing ends of the two horizontal screws rotatably connected to the inner walls of the two sides of the U-shaped top plate, and the proximal ends of the two horizontal screws fixedly connected to the opposing ends of the two output shafts of the dual-axis motor. The threads of the two horizontal screws have opposite directions. A transverse sliding seat is threaded onto the horizontal screw, and two rectangular sliding sleeves are slidably fitted onto the U-shaped top plate. The top inner wall and bottom inner wall of the rectangular sliding sleeves are fixedly connected to the top and bottom of the corresponding transverse sliding seat, respectively, and the bottom of the rectangular sliding sleeves is fixedly connected to the top of the corresponding sliding seat.

[0011] Preferably, the vertical insertion retaining and anti-excavation deformation component includes a rectangular plate fixedly connected to the bottom of the corresponding U-shaped plate. A retaining plate with a blade-shaped bottom is provided below the U-shaped plate. A rectangular groove is provided on the top of the retaining plate. The rectangular plate is slidably fitted into the corresponding rectangular groove. A sliding groove is provided on the opposing side of the two rectangular plates. A vertical screw is rotatably installed between the bottom inner wall of the sliding groove and the bottom inner wall of the corresponding U-shaped plate. The top end of the vertical screw is fixedly connected to the bottom end of the output shaft of the corresponding drive motor. A slider is fixedly connected to the inner wall of the opposing side of the two rectangular grooves. The slider is threaded onto the corresponding vertical screw. Wear-resistant steel plates are fixedly connected to the adjacent side of the two retaining plates.

[0012] Preferably, the vertical support assembly includes an L-shaped support plate, the top of which has two vertical guide grooves, and a vertical guide rod is slidably sleeved in the vertical guide grooves. The bottom sides of the U-shaped top plate are respectively fixedly connected to the top ends of the corresponding two vertical guide rods. Two elastic damping sleeves are fixedly connected between the top of the L-shaped support plate and the bottom of the U-shaped top plate. The elastic damping sleeves are movably sleeved on the corresponding vertical guide rods. A spring is fixedly connected between the bottom end of the vertical guide rod and the bottom inner wall of the corresponding vertical guide groove.

[0013] Preferably, a storage battery and an inverter electrically connected to the storage battery are fixedly installed on the bottom inner wall of the U-shaped base. The vibration motor, electric telescopic rod, dual-axis motor and drive motor are all electrically connected to the inverter. Solar panels electrically connected to the storage battery are fixedly installed on both sides of the top of the U-shaped top plate.

[0014] Preferably, each of the two transverse sliding seats has a first threaded hole on its adjacent side, and the first threaded hole is threadedly connected to the corresponding transverse screw.

[0015] Preferably, the top of the slider has a second threaded hole that is threadedly connected to the corresponding vertical screw.

[0016] Preferably, a limiting groove is provided on the adjacent side of the two vertical guide rods that are opposite to each other on the left and right, and a limiting block is fixedly connected to the inner wall of the adjacent side of the two vertical guide grooves that are opposite to each other on the left and right. The limiting block is slidably connected to the corresponding limiting groove, and two anchor rod installation holes are provided on the bottom inner wall of the L-shaped support plate.

[0017] Preferably, the bottom of the spiral plate is further equipped with a slope detection component. The slope detection component is used to measure the slope when the spiral plate is tilted. The slope detection component includes a fixed seat fixedly connected to the bottom of the corresponding spiral plate. A semi-circular protractor is fixedly connected to the bottom of the fixed seat. A support shaft is fixedly connected to the front side of the fixed seat. A rotating seat is rotatably sleeved on the support shaft. A counterweight is fixedly connected to the bottom of the rotating seat. A pointer that cooperates with the corresponding semi-circular protractor is fixedly connected to the bottom of the counterweight.

[0018] This invention also proposes a method for using a deformation prevention device for asymmetric excavation of foundation pits, comprising the following steps:

[0019] S1: Use external anchor bolts to fix the L-shaped support plate, use a dual-axis motor to drive two horizontal screws to rotate to control the two horizontal sliding seats to move close to each other. The two horizontal sliding seats drive the two moving seats to move close to each other through two rectangular sliding sleeves. The two moving seats drive the two limit plates to move close to each other to adjust the spacing.

[0020] S2: The two electric telescopic rods drive the corresponding spiral plates to rotate downwards and tilt, and the two spiral plates drive the corresponding limit plates to rotate and change the limit slope.

[0021] S3: The vibration motor drives the top plate of the loop seat to vibrate rigidly, and the top plate of the loop seat drives the two limit plates to vibrate rigidly.

[0022] S4: The drive motor drives the corresponding vertical screw to rotate, which in turn drives the corresponding slider to move downward. The slider drives the corresponding baffle plate to move downward. The two baffle plates that move downward and vibrate are inserted into the foundation to be excavated to carry out the work of preventing collapse and deformation on both sides.

[0023] S5: When the rigid vibration of the U-shaped top plate described in S3 occurs, it causes the four vertical guide rods to slide slightly vertically in their respective vertical guide grooves, and provides flexible support for the compression or release of the elastic damping sleeve and spring.

[0024] S6: When the spiral plate described in S2 rotates downwards and tilts, it drives the semicircular protractor to tilt as a whole through the corresponding fixed seat. The counterweight remains vertical under its own weight and drives the corresponding pointer to remain vertical. The position of the pointer on the semicircular protractor is changed to measure and adjust the inclination.

[0025] Compared with the prior art, the beneficial effects of the present invention are:

[0026] 1. By combining the set U-shaped top plate, dual-axis motor, threaded drive assembly, U-shaped plate, moving seat and vertical insertion retaining anti-excavation deformation assembly, the distance between the two retaining plates can be flexibly adjusted according to the excavation width requirements of the foundation pit, which can form a mutual restriction effect on both sides, and use the mutual restriction on both sides to ensure the stability of the restriction and anti-deformation.

[0027] 2. By combining the electric telescopic rod, the spiral plate, the movable seat and the vertical insert retainer to prevent excavation deformation, the slope of the limiting slope on both sides can be flexibly adjusted according to the excavation requirements of different slopes on both sides of the asymmetrical foundation pit, thereby improving applicability and flexibility of use.

[0028] 3. Through the combination of the set drive motor, U-shaped top plate, U-shaped seat, U-shaped plate, vertical insertion retaining anti-excavation deformation component, vibration motor and vertical elastic support component, it can drive the two retaining plates to vibrate and move down to insert into the foundation to be excavated before excavation to carry out the retaining and anti-collapse deformation work on both sides. This allows the excavation equipment bucket to directly carry out excavation work between the two retaining plates, which facilitates the direct restriction of anti-collapse deformation on both sides during excavation and improves the use effect.

[0029] 4. By combining the set-up retaining plate and the retaining slope detection component, the adjustment slope of the retaining plate can be measured when the retaining plate is tilted, thereby facilitating personnel to accurately control the excavation slope of the asymmetric foundation pit and improving the accuracy of retaining excavation work.

[0030] This invention allows for flexible adjustment of the spacing and limiting slope of two retaining plates according to the excavation requirements of asymmetrical foundation pits with different slopes on both sides. This improves applicability and flexibility of use. It facilitates the vibration and downward movement of the two retaining plates before excavation, inserting them into the foundation to be excavated for limiting and preventing collapse deformation on both sides. It can directly limit the collapse deformation on both sides during excavation, improving the effectiveness of use. Furthermore, it allows for direct measurement of the slope when the retaining plates are rotated and adjusted, enabling personnel to accurately control the excavation slope of asymmetrical foundation pits and improve the accuracy of retaining excavation work. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present invention;

[0032] Figure 2 for Figure 1 A schematic diagram of the cross-sectional structure;

[0033] Figure 3 for Figure 2 A magnified structural diagram of part A in the diagram;

[0034] Figure 4 This is a three-dimensional structural diagram of Embodiment 2 of the present invention;

[0035] Figure 5 for Figure 4 A three-dimensional structural diagram of the excavation anti-deformation device before it is installed on the foundation to be excavated;

[0036] Figure 6 This is a schematic diagram of the main sectional view of an anti-deformation device for asymmetric excavation of a foundation pit proposed in Embodiment 2 of the present invention;

[0037] Figure 7 for Figure 6 A magnified structural diagram of part B in the diagram;

[0038] Figure 8 This is a schematic diagram of the structure of an anti-deformation device for asymmetric excavation of a foundation pit, which is asymmetrically inserted into the foundation to be excavated to prevent deformation and limit its movement, according to Embodiment 2 of the present invention.

[0039] In the diagram: 1. L-shaped support plate; 2. Anchor bolt installation hole; 3. Vertical guide groove; 4. Vertical guide rod; 5. Spring; 6. Elastic damping sleeve; 7. U-shaped top plate; 8. U-shaped seat; 9. Vibration motor; 10. Battery; 11. Inverter; 12. Dual-axis motor; 13. Horizontal screw; 14. Horizontal sliding seat; 15. Rectangular sliding sleeve; 16. Moving seat; 17. Solar panel; 18. Support rod; 19. U-shaped plate; 20. Electric telescopic rod; 21. Drive motor; 22. Rectangular plate; 23. Limiting plate; 24. Rectangular groove; 25. Slide groove; 26. Slider; 27. Vertical screw; 28. Wear-resistant steel sheet; 29. ​​Fixed seat; 30. Semi-circular measuring disc; 31. Support shaft; 32. Rotating seat; 33. Counterweight; 34. Pointer. Detailed Implementation

[0040] Example 1

[0041] like Figures 1 to 3 As shown, this embodiment proposes an anti-deformation device for asymmetric excavation of foundation pits, including an anti-deformation device body installed above the foundation to be excavated. The anti-deformation device body includes a U-shaped top plate 7, a U-shaped seat 8 fixedly connected to the top of the U-shaped top plate 7, and a vibration motor 9 fixedly connected to the top of the U-shaped seat 8. When the vibration motor 9 is started, it provides a hard vibration force to the U-shaped top plate 7 through the U-shaped seat 8. A dual-axis motor 12 is fixedly connected to the bottom of the U-shaped seat 8. Two threaded drive assemblies are installed on the U-shaped top plate 7. The near ends of the two threaded drive assemblies are fixedly connected to the opposing ends of the two output shafts of the dual-axis motor 12, respectively. A movable seat 16 is fixedly connected to the bottom of the threaded drive assembly. The threaded drive assembly is used to drive the two movable seats 16 to move close together or repulsively when the dual-axis motor 12 is started.

[0042] A support rod 18 is hinged to the bottom of the movable base 16. A U-shaped plate 19 is fixedly connected to the bottom end of the support rod 18. An inclined electric telescopic rod 20 is hinged between the opposing sides of the two U-shaped plates 19 and the bottom of the corresponding movable base 16. A vertical insertion limit anti-dumping deformation component is installed at the bottom of the U-shaped plate 19. A drive motor 21 with an output shaft fixedly connected to the vertical insertion limit anti-dumping deformation component is fixedly installed on the inner wall of the top of the U-shaped plate 19. A storage battery 10 and an inverter 11 electrically connected to the storage battery 10 are fixedly installed on the inner wall of the bottom of the U-shaped base 8. The vibration motor 9, the electric telescopic rod 20, the dual-axis motor 12, and the drive motor 21 are all electrically connected to the inverter 11. Solar panels 17 electrically connected to the storage battery 10 are fixedly installed on both sides of the top of the U-shaped top plate 7. The solar panels 17 are used to convert solar energy into electrical energy and store it. Inside the battery 10, the inverter 11 converts DC power into AC power for operation. The electric telescopic rod 20 drives the corresponding U-shaped plate 19 to rotate and tilt. Two vertically inserted anti-deformation blocking components are used to adjust the anti-deformation blocking distance when the two moving seats 16 move close to or repulsively, and to flexibly adjust the blocking slope when the U-shaped plate 19 tilts according to the anti-deformation blocking slope. The two sides can be adjusted independently, which can be used for asymmetrical foundation pit blocking work with different slopes on both sides, and to insert into the foundation to be excavated for blocking work when the U-shaped top plate 7 is subjected to hard vibration and the drive motor 21 is started. The blocking on both sides can prevent the phenomenon of side collapse and deformation caused by loose geology during excavation. Vertical elastic support components are fixedly connected to both sides of the bottom of the U-shaped top plate 7. The vertical elastic support components are used to provide vertical flexible support for the U-shaped top plate 7.

[0043] Specifically, the threaded drive assembly includes two horizontal screws 13. The opposing ends of the two horizontal screws 13 are rotatably connected to the inner walls of the two sides of the U-shaped top plate 7. Each inner wall of the U-shaped top plate 7 is fixedly connected to a first bearing. The inner ring of the first bearing is fixedly fitted to the outer side of the corresponding horizontal screw 13, thus achieving the effect of rotatably mounting the horizontal screw 13. The adjacent ends of the two horizontal screws 13 are fixedly connected to the opposing ends of the two output shafts of the dual-axis motor 12. The threads of the two horizontal screws 13 have opposite directions. A transverse shift seat 14 is threaded onto the horizontal screw 13. Each of the two transverse shift seats 14 has a first threaded hole on its adjacent side, and the first threaded hole is threadedly connected to the corresponding horizontal screw 13. Utilizing the threaded connection between the horizontal screw 13 and the first threaded hole, the two horizontal screws 13... The reverse screw direction facilitates the repulsive or near-repulsive displacement of the two transverse sliding seats 14 when the two transverse screws 13 rotate. Two rectangular sliding sleeves 15 are slidably fitted on the top plate 7. The top inner wall and bottom inner wall of the rectangular sliding sleeve 15 are fixedly connected to the top and bottom of the corresponding transverse sliding seat 14, respectively. The bottom of the rectangular sliding sleeve 15 is fixedly connected to the top of the corresponding moving seat 16. The transverse screws 13, rectangular sliding sleeves 15 and transverse sliding seats 14 cooperate to drive the two transverse screws 13 to rotate using the dual-axis motor 12. The rotation of the two transverse screws 13 drives the two transverse sliding seats 14 to move near or repulsively. The two transverse sliding seats 14 drive the two rectangular sliding sleeves 15 to move near or repulsively. The two rectangular sliding sleeves 15 are used to drive the two moving seats 16 to move near or repulsively.

[0044] Furthermore, the vertical insertion retaining and anti-deformation component for excavation includes a rectangular plate 22 fixedly connected to the bottom of the corresponding U-shaped plate 19. Below the U-shaped plate 19, a retaining plate 23 with a blade-shaped bottom is provided. A rectangular groove 24 is provided on the top of the retaining plate 23. The rectangular plate 22 is slidably fitted into the corresponding rectangular groove 24. Sliding grooves 25 are provided on the opposing sides of the two rectangular plates 22. A vertical screw 27 is rotatably installed between the bottom inner wall of the sliding groove 25 and the bottom inner wall of the corresponding U-shaped plate 19. A circular through hole is provided on the top inner wall of the sliding groove 25 for the corresponding vertical screw 27 to pass through. A circular hole is provided on the bottom inner wall of the U-shaped plate 19. A second bearing is fixedly connected to both the circular hole and the bottom inner wall of the slide groove 25. The inner ring of the second bearing is fixedly fitted to the outer side of the corresponding vertical screw 27, thus enabling the vertical screw 27 to rotate. The top end of the vertical screw 27 is fixedly connected to the bottom end of the output shaft of the corresponding drive motor 21. A slider 26 is fixedly connected to the inner wall of each of the two opposing rectangular grooves 24. The slider 26 is threaded onto the corresponding vertical screw 27. The top of the slider 26 has a second threaded hole for threaded connection with the corresponding vertical screw 27. The threaded connection between the vertical screw 27 and the second threaded hole facilitates the upward and downward displacement of the corresponding slider 26 when the vertical screw 27 rotates. Wear-resistant steel plates 28 are fixedly connected to the adjacent sides of the two limit plates 23. The rectangular plate 22, limit plate 23, vertical screw 27, slider 26 and wear-resistant steel plates 28 work together. When the U-shaped plate 19 tilts, the corresponding rectangular plate 22 drives the limit plate 23 to tilt. By using the adjustable tilt of the two limit plates 23, the inclination of the two limit plates 23 can be flexibly adjusted according to the different slopes on both sides of the asymmetrical foundation pit, which facilitates the application to different slopes. The asymmetric foundation pit anti-collapse deformation effect is achieved by using a drive motor 21 to drive the corresponding vertical screw 27 to rotate. The rotation of the vertical screw 27 drives the corresponding slider 26 to move downward. The slider 26 drives the corresponding baffle plate 23 to move downward. When the U-shaped top plate 7 is subjected to hard vibration, the hard vibration force is transmitted downward to the two baffle plates 23. The downward movement of the two baffle plates 23 and the hard vibration make it easy to insert into the foundation to be excavated to form a baffle effect. Personnel can directly excavate between the two baffle plates 23 using excavation equipment. The baffles on both sides can prevent the phenomenon of collapse and deformation inward due to loose geology on both sides during excavation.

[0045] Furthermore, the vertical support assembly includes an L-shaped support plate 1. Two vertical guide grooves 3 are formed at the top of the L-shaped support plate 1, and vertical guide rods 4 are slidably fitted inside the vertical guide grooves 3. The bottom sides of the U-shaped top plate 7 are fixedly connected to the top ends of the corresponding two vertical guide rods 4. Two elastic damping sleeves 6 are fixedly connected between the top of the L-shaped support plate 1 and the bottom of the U-shaped top plate 7. The elastic damping sleeves 6 are movably fitted onto the corresponding vertical guide rods 4. A spring 5 is fixedly connected between the bottom end of the vertical guide rod 4 and the bottom inner wall of the corresponding vertical guide groove 3. Limit grooves are formed on the adjacent sides of the two opposing vertical guide rods 4, and limit grooves are fixed on the adjacent inner walls of the two opposing vertical guide grooves 3. A fixed connection limit block is provided, which slides with the corresponding limit groove to limit and prevent the vertical guide rod 4 from falling off. Two anchor rod installation holes 2 are provided on the bottom inner wall of the L-shaped support plate 1. The anchor rod installation holes 2 are provided for personnel to install and fix the L-shaped support plate 1 through external anchor rods. The L-shaped support plate 1, vertical guide rod 4, elastic damping sleeve 6 and spring 5 work together to vertically guide the U-shaped top plate 7 by sliding the four vertical guide rods 4 vertically in the four vertical guide grooves 3. The four elastic damping sleeves 6 and four springs 5 ​​provide flexible support for the U-shaped top plate 7. The flexible support can provide support while avoiding the impact of hard vibration on the U-shaped top plate 7.

[0046] A method for using a deformation prevention device for asymmetric excavation of foundation pits includes the following steps:

[0047] S1: Place this device on the foundation to be excavated for an asymmetrical foundation pit, and fix the L-shaped support plate 1 with external anchor bolts. When it is necessary to adjust the distance between the two limit plates 23 according to the width of the foundation pit, start the dual-axis motor 12 in the forward direction to drive the two horizontal screws 13 to rotate. The rotation of the two horizontal screws 13 drives the two horizontal sliding seats 14 to move close to each other. The two horizontal sliding seats 14 drive the two rectangular sliding sleeves 15 to slide close to each other on the U-shaped top plate 7. The two rectangular sliding sleeves 15 drive the two moving seats 16 to move close to each other. The two moving seats 16 drive the two limit plates 23 to move close to each other in sequence through the two support rods 18, the two U-shaped plates 19 and the two rectangular plates 22 to adjust the distance.

[0048] S2: After the distance between the two limiting plates 23 mentioned in S1 is adjusted, when it is necessary to adjust the slope of the two limiting plates 23 according to the different slopes on both sides of the asymmetric foundation pit, the electric telescopic rod 20 is started in the forward direction to drive the corresponding U-shaped plate 19 to rotate and tilt downward. The U-shaped plate 19 drives the limiting plate 23 to tilt through the corresponding rectangular plate 22 to adjust the limiting slope. By using the adjustable tilt of the two limiting plates 23, the slope of the two limiting plates 23 can be flexibly adjusted according to the different slopes on both sides of the asymmetric foundation pit, which can be conveniently applied to the anti-collapse deformation effect of asymmetric foundation pits with different slopes, and improve the applicability and flexibility of use.

[0049] S3: After the slope of the limit plate 23 mentioned in S2 is properly adjusted, start the vibration motor 9 and the two drive motors 21 in the forward direction. The vibration motor 9 drives the top plate 7 to vibrate rigidly through the loop seat 8. The top plate 7 drives the two limit plates 23 to vibrate rigidly in sequence through the two rectangular sliding sleeves 15, the two moving seats 16, the two support rods 18, the two loop plates 19 and the two rectangular plates 22.

[0050] S4: The drive motor 21 drives the corresponding vertical screw 27 to rotate. The rotation of the vertical screw 27 drives the corresponding slider 26 to move downward. The slider 26 drives the corresponding limit plate 23 to move downward. The two limit plates 23 that move downward and vibrate are inserted into the foundation to be excavated to limit the two sides. Then, the personnel can directly excavate between the two limit plates 23 through the bucket of the external excavation equipment. The pre-limiting on both sides can prevent the phenomenon of collapse and deformation inward due to loose geology on both sides during excavation, thus improving the use effect.

[0051] S5: When the U-shaped top plate 7 described in S3 vibrates hard, it causes the four vertical guide rods 4 to slide slightly vertically in the corresponding vertical guide grooves 3, and compresses or releases the elastic damping sleeves 6 and springs 5. The four elastic damping sleeves 6 and four springs 5 ​​are used to achieve flexible support for the U-shaped top plate 7. The flexible support can provide support while avoiding the impact of hard vibration on the U-shaped top plate 7.

[0052] Example 2

[0053] like Figures 4 to 8As shown, this embodiment differs from Embodiment 1 in that: a slope detection component is also installed at the bottom of the U-shaped plate 19. This component measures the slope when the U-shaped plate 19 is tilted. The slope detection component includes a fixed base 29 fixedly connected to the bottom of the corresponding U-shaped plate 19. A semi-circular protractor 30 is fixedly connected to the bottom of the fixed base 29. A support shaft 31 is fixedly connected to the front side of the fixed base 29. A rotating seat 32 is rotatably mounted on the support shaft 31. A through hole is opened at the top front side of the rotating seat 32, and a third bearing is fixedly mounted inside the through hole. The inner ring of the third bearing is fixedly fitted to the outer side of the corresponding support shaft 31, thus achieving the effect of rotating the rotating seat 32. A counterweight 33 is fixedly connected to the bottom of the rotating seat 32, and a pointer 34 that cooperates with the corresponding semicircular protractor 30 is fixedly connected to the bottom of the counterweight 33. The fixed seat 29, semicircular protractor 30, support shaft 31, rotating seat 32, counterweight 33 and pointer 34 cooperate to tilt the semicircular protractor 30 together through the corresponding fixed seat 29 when the tapered plate 19 is tilted. Under its own weight, the counterweight 33 will always remain vertical and drive the corresponding pointer 34 to remain vertical. At this time, the position indicated by the pointer 34 on the semicircular protractor 30 changes. By observing the value of the indicated position, it is convenient for personnel to directly and accurately judge the tilt angle of the tapered plate 19 and the stop plate 23, and improve the accuracy of the stop adjustment.

[0054] A method for using a deformation prevention device for asymmetric excavation of foundation pits includes the following steps:

[0055] S1: Place this device on the foundation to be excavated for an asymmetrical foundation pit, and fix the L-shaped support plate 1 with external anchor bolts. When it is necessary to adjust the distance between the two limit plates 23 according to the width of the foundation pit, start the dual-axis motor 12 in the forward direction to drive the two horizontal screws 13 to rotate. The rotation of the two horizontal screws 13 drives the two horizontal sliding seats 14 to move close to each other. The two horizontal sliding seats 14 drive the two rectangular sliding sleeves 15 to slide close to each other on the U-shaped top plate 7. The two rectangular sliding sleeves 15 drive the two moving seats 16 to move close to each other. The two moving seats 16 drive the two limit plates 23 to move close to each other in sequence through the two support rods 18, the two U-shaped plates 19 and the two rectangular plates 22 to adjust the distance.

[0056] S2: After the distance between the two limiting plates 23 mentioned in S1 is adjusted, when it is necessary to adjust the slope of the two limiting plates 23 according to the different slopes on both sides of the asymmetric foundation pit, the electric telescopic rod 20 is started in the forward direction to drive the corresponding U-shaped plate 19 to rotate and tilt downward. The U-shaped plate 19 drives the limiting plate 23 to tilt through the corresponding rectangular plate 22 to adjust the limiting slope. By using the adjustable tilt of the two limiting plates 23, the slope of the two limiting plates 23 can be flexibly adjusted according to the different slopes on both sides of the asymmetric foundation pit, which can be conveniently applied to the anti-collapse deformation effect of asymmetric foundation pits with different slopes, and improve the applicability and flexibility of use.

[0057] S3: After the slope of the limit plate 23 mentioned in S2 is properly adjusted, start the vibration motor 9 and the two drive motors 21 in the forward direction. The vibration motor 9 drives the top plate 7 to vibrate rigidly through the loop seat 8. The top plate 7 drives the two limit plates 23 to vibrate rigidly in sequence through the two rectangular sliding sleeves 15, the two moving seats 16, the two support rods 18, the two loop plates 19 and the two rectangular plates 22.

[0058] S4: The drive motor 21 drives the corresponding vertical screw 27 to rotate. The rotation of the vertical screw 27 drives the corresponding slider 26 to move downward. The slider 26 drives the corresponding limit plate 23 to move downward. The two limit plates 23 that move downward and vibrate are inserted into the foundation to be excavated to limit the two sides. Then, the personnel can directly excavate between the two limit plates 23 through the bucket of the external excavation equipment. The pre-limiting on both sides can prevent the phenomenon of collapse and deformation inward due to loose geology on both sides during excavation, thus improving the use effect.

[0059] S5: When the rigid vibration of the U-shaped top plate 7 described in S3 occurs, it causes the four vertical guide rods 4 to slide slightly vertically in the corresponding vertical guide grooves 3, and compresses or releases the elastic damping sleeves 6 and springs 5. The four elastic damping sleeves 6 and four springs 5 ​​are used to achieve flexible support for the U-shaped top plate 7. The flexible support can provide support while avoiding the impact of the rigid vibration of the U-shaped top plate 7.

[0060] S6: When the tapered plate 19 mentioned in S2 rotates downward and tilts, it also drives the semicircular protractor 30 to tilt as a whole through the corresponding fixed seat 29. Under its own gravity, the counterweight 33 will always remain vertical and drive the corresponding pointer 34 to remain vertical. Change the position of the pointer 34 on the semicircular protractor 30 to measure and adjust the inclination. By watching the value of the indicated position, it is convenient for personnel to directly and accurately judge the tilt angle of the tapered plate 19 and the stop plate 23, and improve the accuracy of the stop adjustment.

[0061] This embodiment, through the combination of the set spiral plate 19 and the retaining slope detection component, can measure the adjustment slope of the retaining plate 23 when it is tilted, thereby facilitating personnel to accurately control the excavation slope of the asymmetric foundation pit and improving the accuracy of retaining excavation work.

[0062] In this embodiment, when applied to excavating a foundation pit, multiple devices can be installed along the excavation direction. After a portion of the pit is excavated, one device at the front end can be removed. Then, personnel can reinforce the foundation pit using external concrete or other reinforcement methods. The removed device can be pushed backward and installed to the excavation site. This allows excavation and reinforcement to be carried out simultaneously. Multiple devices can be moved one by one and the internal positions of the foundation pits where the devices have been removed can be reinforced one by one. In addition, when the retaining plate 23 is inserted into the foundation to be excavated, it can also compact the outer geology, reducing the loosening, collapse, and deformation phenomena after removal.

Claims

1. A deformation prevention device for asymmetric excavation of a foundation pit, comprising an excavation deformation prevention device body disposed above the foundation to be excavated, characterized in that, The excavation anti-deformation device body includes a U-shaped top plate (7), a U-shaped seat (8) is fixedly connected to the top of the U-shaped top plate (7), and a vibration motor (9) is fixedly connected to the top of the U-shaped seat (8); a dual-axis motor (12) is fixedly connected to the bottom of the U-shaped seat (8), and two threaded drive assemblies are installed on the U-shaped top plate (7). The near ends of the two threaded drive assemblies are fixedly connected to the opposing ends of the two output shafts of the dual-axis motor (12), and a movable seat (16) is fixedly connected to the bottom of the threaded drive assembly. The bottom of the movable seat (16) is hinged with a support rod (18), and the bottom end of the support rod (18) is fixedly connected with a U-shaped plate (19). The two U-shaped plates (19) are respectively hinged to the bottom of the corresponding movable seat (16) with inclined electric telescopic rods (20). The bottom of the U-shaped plate (19) is equipped with a vertical insertion limit anti-excavation deformation component. The top inner wall of the U-shaped plate (19) is fixedly equipped with a drive motor (21) whose output shaft is fixedly connected to the vertical insertion limit anti-excavation deformation component. Vertical spring support components are fixedly connected to both sides of the bottom of the spiral top plate (7); The thread drive assembly includes a horizontal screw (13), the two opposing ends of the horizontal screws (13) are rotatably connected to the inner walls of the two sides of the top plate (7), the two adjacent ends of the horizontal screws (13) are fixedly connected to the opposing ends of the two output shafts of the dual-axis motor (12), the threads of the two horizontal screws (13) are opposite, a transverse sliding seat (14) is threaded on the horizontal screw (13), and two rectangular sliding sleeves (15) are slidably fitted on the top plate (7). The top inner wall and bottom inner wall of the rectangular sliding sleeve (15) are fixedly connected to the top and bottom of the corresponding transverse sliding seat (14), and the bottom of the rectangular sliding sleeve (15) is fixedly connected to the top of the corresponding moving seat (16). The vertical insertion retaining and anti-excavation deformation component includes a rectangular plate (22) fixedly connected to the bottom of the corresponding U-shaped plate (19). A retaining plate (23) with a blade-shaped bottom is provided below the U-shaped plate (19). A rectangular groove (24) is provided on the top of the retaining plate (23). The rectangular plate (22) is slidably fitted in the corresponding rectangular groove (24). A sliding groove (25) is provided on the opposing side of the two rectangular plates (22). A vertical screw (27) is rotatably installed between the bottom inner wall of the sliding groove (25) and the bottom inner wall of the corresponding U-shaped plate (19). The top of the vertical screw (27) is fixedly connected to the bottom end of the output shaft of the corresponding drive motor (21). A slider (26) is fixedly connected on the opposing side inner wall of the two rectangular grooves (24). The slider (26) is threaded onto the corresponding vertical screw (27). A wear-resistant steel sheet (28) is fixedly connected on the adjacent side of the two retaining plates (23). The vertical support assembly includes an L-shaped support plate (1), with two vertical guide grooves (3) on the top of the L-shaped support plate (1), and a vertical guide rod (4) is slidably sleeved in the vertical guide groove (3). The bottom sides of the U-shaped top plate (7) are fixedly connected to the top of the corresponding two vertical guide rods (4). Two elastic damping sleeves (6) are fixedly connected between the top of the L-shaped support plate (1) and the bottom of the U-shaped top plate (7). The elastic damping sleeves (6) are movably sleeved on the corresponding vertical guide rods (4). A spring (5) is fixedly connected between the bottom end of the vertical guide rod (4) and the bottom inner wall of the corresponding vertical guide groove (3). The bottom of the spiral plate (19) is also equipped with a limit slope detection component. The limit slope detection component includes a fixed seat (29) fixedly connected to the bottom of the corresponding spiral plate (19). A semi-circular protractor (30) is fixedly connected to the bottom of the fixed seat (29). A support shaft (31) is fixedly connected to the front side of the fixed seat (29). A rotating seat (32) is rotatably sleeved on the support shaft (31). A counterweight (33) is fixedly connected to the bottom of the rotating seat (32). A pointer (34) that cooperates with the corresponding semi-circular protractor (30) is fixedly connected to the bottom of the counterweight (33).

2. The anti-deformation device for asymmetric excavation of foundation pits according to claim 1, characterized in that: A storage battery (10) and an inverter (11) electrically connected to the storage battery (10) are fixedly installed on the bottom inner wall of the U-shaped base (8). The vibration motor (9), electric telescopic rod (20), dual-axis motor (12) and drive motor (21) are all electrically connected to the inverter (11). Solar panels (17) electrically connected to the storage battery (10) are fixedly installed on both sides of the top of the U-shaped top plate (7).

3. The anti-deformation device for asymmetric excavation of foundation pits according to claim 1, characterized in that: Both of the two transverse sliding seats (14) have a first threaded hole on their adjacent sides, and the first threaded hole is threadedly connected to the corresponding transverse screw (13).

4. The anti-deformation device for asymmetric excavation of foundation pits according to claim 1, characterized in that: The top of the slider (26) has a second threaded hole that is threadedly connected to the corresponding vertical screw (27).

5. The anti-deformation device for asymmetric excavation of foundation pits according to claim 1, characterized in that: Limiting grooves are provided on the side of the two vertical guide rods (4) that are close to each other. Limiting blocks are fixedly connected to the inner wall of the side of the two vertical guide grooves (3) that are close to each other. The limiting blocks are slidably connected to the corresponding limiting grooves. Two anchor rod installation holes (2) are provided on the bottom inner wall of the L-shaped support plate (1).

6. The method of using the anti-deformation device for asymmetric excavation of foundation pits according to any one of claims 1 to 5, characterized in that, Includes the following steps: S1: Fix the L-shaped support plate (1) with external anchor rods, and use a dual-axis motor (12) to drive two horizontal screws (13) to rotate to control the two horizontal moving seats (14) to move close to each other. The two horizontal moving seats (14) drive the two moving seats (16) to move close to each other through two rectangular sliding sleeves (15). The two moving seats (16) drive the two stop plates (23) to move close to each other to adjust the spacing. S2: The two electric telescopic rods (20) drive the corresponding spiral plates (19) to rotate downwards and tilt, and the two spiral plates (19) drive the corresponding limit plates (23) to rotate and change the limit slope. S3: The vibration motor (9) drives the top plate (7) to vibrate rigidly through the backrest (8), and the top plate (7) drives the two limit plates (23) to vibrate rigidly. S4: The drive motor (21) drives the corresponding vertical screw (27) to rotate and drive the corresponding slider (26) to move downward. The slider (26) drives the corresponding baffle (23) to move downward. The two baffles (23) that move downward and vibrate hard are inserted into the foundation to be excavated to carry out the work of preventing collapse and deformation on both sides. S5: When the rigid vibration of the U-shaped top plate (7) described in S3 causes the four vertical guide rods (4) to slide slightly vertically in the corresponding vertical guide grooves (3), and provides flexible support for the compression or release of the elastic damping sleeve (6) and spring (5); S6: When the spiral plate (19) mentioned in S2 rotates downward and tilts, it drives the semicircular protractor (30) to tilt as a whole through the corresponding fixed seat (29). The counterweight (33) remains vertical under its own weight and drives the corresponding pointer (34) to remain vertical. Change the position of the pointer (34) on the semicircular protractor (30) to measure and adjust the slope.

Images