Deep foundation pit construction structure and deep foundation pit construction method

Abstract

The application relates to a deep foundation pit construction structure and a deep foundation pit construction method, and belongs to the technical field of deep foundation pit construction. The deep foundation pit construction structure comprises a soil compaction plate and two connecting blocks arranged on the side, away from a slope surface, of the soil compaction plate. Two mounting strips are arranged on each side of the soil compaction plate in a relative rotating mode. The rotating axis of the mounting strip is parallel to the length direction of the corresponding side of the soil compaction plate. The mounting strip extends in a direction away from the connecting block. A blocking plate is arranged between the two mounting strips on each side of the soil compaction plate in a rotating mode. The blocking plate is used for opening and closing the side of the soil compaction plate. The rotating shaft of the blocking plate is located at the end of the mounting strip away from the connecting block. The rotating axis of the blocking plate is parallel to the rotating axis of the corresponding mounting strip. The blocking plate rotates in a direction close to or away from the soil compaction plate. The application has the effect of facilitating the dismounting of the soil compaction plate from the solidified concrete.

Description

Technical Field

[0001] This application relates to the field of deep foundation pit construction technology, and in particular to a deep foundation pit construction structure and a deep foundation pit construction method. Background Technology

[0002] Deep foundation pits typically refer to excavations with a depth exceeding 5 meters (including 5 meters), or projects with particularly complex geological conditions, surrounding environment, and underground pipelines even if the depth does not exceed 5 meters. During the construction of deep foundation pits, in order to ensure the safety of underground construction and the surrounding environment, it is usually necessary to construct support structures on the sidewalls and surrounding environment of the deep foundation pit.

[0003] In related technologies, such as Chinese patent document CN112681342A, a deep foundation pit support structure is disclosed, including a slope, which includes an upper plane, a slope surface, and a lower plane. A fixing plate is provided on the upper plane, and an upper limit plate is fixedly connected to the end of the fixing plate near the slope surface. An installation plate is fixedly provided on the lower plane, and a lower limit plate is fixedly connected to the end of the installation plate near the slope surface. A soil pressing plate parallel to the slope surface is slidably provided between the upper limit plate and the lower limit plate. An embedded frame is fixedly connected to the side of the soil pressing plate near the slope surface. A mud injection hole is opened at the top of the soil pressing plate. Two connecting blocks are slidably connected to the outside of the soil pressing plate. A support baffle is fixedly connected to the upper end of the installation plate. A first movable rod and a second movable rod are slidably provided on the support baffle. The ends of the first movable rod and the second movable rod near the slope surface are respectively rotatably connected to the two connecting blocks through pins. During operation, a soil-pressing plate is installed between the upper limit plate and the lower limit plate; the right ends of the first and second movable rods are rotatably connected to the corresponding connecting blocks via pins, so that the first and second movable rods move synchronously, causing the soil-pressing plate to compact the loose soil on the slope; then the soil-pressing plate is detached from the slope, forming a gap with the slope, and concrete is filled into the gap through the mud injection hole; after the filled concrete has solidified, the fixing plate, mounting plate, first movable rod, second movable rod, soil-pressing plate, upper limit plate, and lower limit plate are disassembled in sequence.

[0004] Regarding the aforementioned technologies, since the embedded frame is set along the circumference of the soil compaction plate, a closed area of ​​concrete is formed between the soil compaction plate, the embedded frame, and the slope. After the concrete between the soil compaction plate and the embedded frame solidifies, the soil compaction plate is not easily removed from the concrete due to the constraint of the concrete. Summary of the Invention

[0005] To facilitate the removal of the soil-pressing slab from the solidified concrete, this application provides a deep foundation pit construction structure and a deep foundation pit construction method.

[0006] Firstly, the deep foundation pit construction structure provided in this application adopts the following technical solution:

[0007] A deep foundation pit construction structure includes a soil-pressing plate and two connecting blocks disposed on the side of the soil-pressing plate away from the slope. Each side of the soil-pressing plate has two mounting strips rotatably mounted on it. The rotation axis of each mounting strip is parallel to the length direction of the corresponding side of the soil-pressing plate, and the mounting strip extends away from the connecting blocks. A sealing plate is rotatably disposed between the two mounting strips on each side of the soil-pressing plate. The sealing plate is used to open and close the side of the soil-pressing plate. The rotation axis of the sealing plate is located at the end of the mounting strip away from the connecting blocks, and the rotation axis of the sealing plate is parallel to the rotation axis of the corresponding mounting strip. The sealing plate rotates towards or away from the soil-pressing plate. A first rotating component is disposed on the soil-pressing plate for adjusting the rotation of the mounting strips towards or away from the connecting blocks, and a second rotating component is disposed on the soil-pressing plate for adjusting the rotation of the sealing plate towards or away from the soil-pressing plate.

[0008] Preferably, the mounting strip is provided with a rotating rod, which rotates on the corresponding side of the soil compaction plate. The rotating rod is located on the side of the soil compaction plate closer to the connecting block. The first rotating component includes a drum sleeved on the rotating rod and a first pull rope wound on the drum. The first pull rope is used to pull the corresponding drum to rotate. When the first pull rope is pulled to unwind the first pull rope from the drum, the mounting strip rotates in a direction away from the connecting block.

[0009] Preferably, the second rotating component includes a second pull rope disposed on the side of the sealing plate near the connecting block, the second pull rope being used to pull the sealing plate to rotate toward the soil compaction plate.

[0010] Preferably, a rotating rod is rotatably provided on the side of the soil pressing plate near the connecting block. The rotating rod is located between the sealing plates on each side. The first pull rope and the second pull rope are both wound around the rotating rod in the same direction. A third rotating component is provided on the soil pressing plate for adjusting the rotation or fixing of the rotating rod.

[0011] Preferably, the third rotating component includes a worm gear sleeved on the rotating rod and a worm rotatably mounted on the soil pressing plate, wherein the worm meshes with the worm gear.

[0012] Preferably, a torsion spring is fitted on the rotating rod, with one end of the torsion spring mounted on the soil pressing plate and the other end mounted on the rotating rod. The torsion spring is used to drive the rotating rod to rotate the mounting strip toward the direction of the connecting block.

[0013] Preferably, the distance from the side of the sealing plate away from the connecting block to the side of the soil-pressing plate near the connecting block is less than the distance from the side of the sealing plate away from the connecting block to the side of the sealing plate near the connecting block. Each side of the soil-pressing plate near the connecting block is provided with a support rod, which corresponds to the sealing plate on that side. A connecting rod is hinged to the support rod, and the support rod is located between the two ends of the corresponding connecting rod. The hinge axis of the connecting rod is parallel to the rotation axis of the corresponding sealing plate. The end of the connecting rod away from the corresponding sealing plate is inclined upwards. The end of the connecting rod near the corresponding sealing plate is inclined upwards. One end of the sealing plate is used to abut against the sealing plate to push the sealing plate to rotate away from the connecting block. The end of the abutting rod away from the corresponding sealing plate is hinged to a connecting rod, and the end of the connecting rod away from the abutting rod is hinged to a sliding block. The sliding block is located on the side of the corresponding abutting rod away from the sealing plate. The sliding block is slidably mounted on the soil pressing plate. The sliding direction of the sliding block is perpendicular to the hinge axis of the corresponding abutting rod. The soil pressing plate is provided with an adjusting member for adjusting the sliding blocks on opposite sides of the soil pressing plate to slide towards or away from the corresponding sealing plate.

[0014] Preferably, the adjusting component includes a bidirectional screw rod rotatably mounted on the soil pressing plate, the rotation axis of the bidirectional screw rod being parallel to the sliding direction of the corresponding two-sided sliding blocks, and the sliding blocks on opposite sides of the soil pressing plate being threadedly connected to the two ends of the corresponding bidirectional screw rod.

[0015] Preferably, the connecting block is slidably disposed on the side of the soil compaction plate away from the slope. The soil compaction plate is provided with connecting rails that slide with the connecting block. A pin is slidably inserted through the connecting rail. The sliding direction of the pin is perpendicular to the sliding direction of the connecting block. The connecting rail is provided with multiple adjustment holes for the pin to pass through. The multiple adjustment holes are arranged along the sliding direction of the connecting block. The connecting block is provided with fixing holes for the pin to pass through.

[0016] Secondly, the deep foundation pit construction method provided in this application adopts the following technical solution:

[0017] A construction method for the aforementioned deep foundation pit construction structure includes the following steps:

[0018] Step 1: Excavation of the foundation pit;

[0019] Step 2: Connect the right ends of the first and second movable rods in the support mechanism to the two connecting blocks by means of pins, so that the first and second movable rods move synchronously toward the slope, and the soil compaction plate compacts the loose soil on the slope.

[0020] Step 3: After compacting the soil on the slope, move the first and second movable rods simultaneously in a direction away from the slope, causing the soil compaction plate to detach from the slope and form a gap between it and the slope.

[0021] Step 4: Adjust the mounting strip with the first rotating component to rotate it away from the connecting block until it abuts against the corresponding side of the soil pressing plate. Adjust the sealing plate with the second rotating component to rotate it closer to the soil pressing plate until the sealing plate abuts against the corresponding side of the soil pressing plate. This creates a concrete cavity between the soil pressing plate, the slope, and the sealing plates on all four sides. Fill the cavity with concrete through the mud injection hole.

[0022] Step 5: After the filling concrete has solidified, pry the sealing plate in sequence to rotate it away from the soil pressing plate, then pry the installation strip to rotate it closer to the connecting block, and then pry the side of the soil pressing plate to separate it from the concrete, thus removing the soil pressing plate, installation strip, sealing plate and concrete.

[0023] Step 6: Use the disassembled parts on the slope at the next depth, and repeat the construction steps 1-5 above.

[0024] In summary, this application includes the following beneficial technical effects:

[0025] In use, the first and second movable rods are rotatably connected to the two connecting blocks respectively via pins. The first and second movable rods push the soil compaction plate towards the slope, compacting the loose soil. Then, the first and second movable rods move the soil compaction plate a certain distance away from the slope, creating a gap between the soil compaction plate and the slope for concrete pouring. Next, the first rotating component adjusts the two opposing mounting strips, causing the corresponding sealing plates to rotate away from the connecting blocks until the mounting strips abut against the corresponding side of the soil compaction plate. Finally, the second rotating component adjusts the sealing plates to their own... The shaft rotates towards the direction of the soil-pressing plate, causing the sealing plate to abut against the corresponding side of the soil-pressing plate. At this time, the side of the installation strip away from the connecting block of the sealing plate abuts against the slope, thereby forming a concrete cavity with the soil-pressing plate, the slope, and the sealing plates on all four sides. Concrete is poured into the cavity through the slurry holes. After the concrete has solidified, the sealing plate is pried and rotated away from the soil-pressing plate to detach it from the concrete. Then, the installation strip is pried and rotated towards the direction of the connecting block to detach the installation strip from the concrete. Finally, the soil-pressing plate can be pried off from the side to detach it from the concrete, making it easy to remove the soil-pressing plate from the solidified concrete. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application.

[0027] Figure 2 This is a partial structural diagram of an embodiment of this application.

[0028] Figure 3 yes Figure 2 Enlarged view of section A.

[0029] Figure 4 This is a partial structural diagram of an embodiment of this application.

[0030] Figure 5 yes Figure 4 Enlarged view of section B.

[0031] Explanation of reference numerals in the attached drawings: 1. Soil-pressing plate; 2. Connecting block; 3. Mounting strip; 4. Sealing plate; 41. Rotating shaft; 5. First rotating component; 51. Drum; 52. First pull rope; 6. Rotating rod; 7. Second pull rope; 8. Rotating rod; 9. Third rotating component; 91. Worm gear; 92. Worm; 10. Torsion spring; 11. Support rod; 12. Abutment rod; 13. Connecting rod; 14. Sliding block; 15. Bidirectional screw; 16. Connecting rail; 17. Pin; 18. Adjusting hole; 19. First movable rod; 20. Second movable rod; 21. Guide pulley; 22. Operating platform; 23. Winding drum; 24. Motor; 25. Mounting block. Detailed Implementation

[0032] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0033] This application discloses a deep foundation pit construction structure. (Refer to...) Figure 1 , Figure 2 and Figure 3 The deep foundation pit construction structure includes a soil-pressing plate 1, a first movable rod 19, a second movable rod 20, and two connecting blocks 2 slidably disposed on the side of the soil-pressing plate 1 away from the slope. The soil-pressing plate 1 has a rectangular cross-section, and the connecting blocks 2 have a T-shaped longitudinal section. The sliding direction of the connecting blocks 2 is parallel to the inclination direction of the soil-pressing plate 1, and the arrangement direction of the two connecting blocks 2 is parallel to the inclination direction of the soil-pressing plate 1. A connecting rail 16 is fixed on the side of the soil-pressing plate 1 away from the slope, and the connecting rail 16 corresponds one-to-one with the connecting block 2. The connecting block 2 slides with the corresponding connecting rail 16. The upper connecting block 2 is used to rotatably connect with the first movable rod 19 via a pin, and the lower connecting block 2 is used to rotatably connect with the second movable rod 20 via a pin. In the embodiment of this application, the first movable rod 19 and the second movable rod 20 have the same structure as those in the related technologies in the background art, and will not be described again here.

[0034] Reference Figure 2 and Figure 3A pin 17 is slidably inserted on the connecting rail 16. The sliding direction of the pin 17 is perpendicular to the sliding direction of the connecting block 2. The connecting rail 16 has multiple adjustment holes 18 for the pin 17 to pass through. The multiple adjustment holes 18 are arranged at intervals along the sliding direction of the connecting block 2. The connecting block 2 has a fixing hole (not shown in the figure) for the pin 17 to pass through. Rubber rings (not shown in the figure) are fitted on both ends of the pin 17 to prevent the pin 17 from falling off the corresponding connecting block 2.

[0035] Reference Figure 4 and Figure 5 Each side of the soil compaction plate 1 is provided with two mounting strips 3 that rotate relative to each other. The mounting strips 3 extend in a direction away from the connecting rail 16. A rotating rod 6 is fixedly inserted at the end of the mounting strip 3 near the connecting rail 16. The rotating rod 6 rotates on the side of the soil compaction plate 1, and the axis of rotation of the rotating rod 6 is parallel to the length direction of the corresponding side of the soil compaction plate 1. The rotating rod 6 is located on the side of the soil compaction plate 1 near the connecting rail 16. When the mounting strip 3 abuts against the corresponding side of the soil compaction plate 1, the length direction of the mounting strip 3 is perpendicular to the plane of the soil compaction plate 1, thereby limiting the rotation angle of the mounting strip 3. A sealing plate 4 is rotatably installed between two opposite mounting strips 3 on one side. The sealing plate 4 is used to open and close the side of the soil pressing plate 1. The rotation axis 41 of the sealing plate 4 is located at the end of the mounting strip 3 away from the connecting rail 16. The rotation axis of the sealing plate 4 is parallel to the rotation axis of the corresponding mounting strip 3. The sealing plate 4 rotates in the direction of approaching or moving away from the soil pressing plate 1. The soil pressing plate 1 is provided with a first rotating member 5 for adjusting the rotation of the mounting strip 3 in the direction of approaching or moving away from the connecting rail 16. The soil pressing plate 1 is provided with a second rotating member for adjusting the rotation of the sealing plate 4 in the direction of approaching or moving away from the soil pressing plate 1.

[0036] In use, remove the pin 17 from the connecting rail 16, slide the connecting block 2 along the connecting rail 16 to a suitable position and align the fixing hole with the adjusting hole 18, then pass the pin 17 through the corresponding connecting rail 16 and connecting block 2 to fix the connecting block 2 relative to the soil compaction plate 1. Rotate the first movable rod 19 to the upper connecting block 2 via a pin, and rotate the second movable rod 20 to the lower connecting block 2 via a pin, thus eliminating the need for upper and lower limit plates and fixing the position of the soil compaction plate 1. Push the soil compaction plate 1 towards the slope by the first movable rod 19 and the second movable rod 20 to compact the loose soil on the slope. Then, move the soil compaction plate 1 away from the slope by the first movable rod 19 and the second movable rod 20 to form a gap for concrete pouring between the soil compaction plate 1 and the slope. Then, adjust the two opposite mounting strips 3 by the first rotating part 5 to move the corresponding sealing plate 4 away from the connecting rail 16. The connecting block 2 is rotated until the mounting strip 3 rotates to abut against the corresponding side of the soil pressing plate 1. At this time, the side of the soil pressing plate 1 restricts the rotation of the mounting strip 3. The side of the mounting strip 3 and the sealing plate 4 away from the connecting block 2 abuts against the slope. Then, the sealing plate 4 is adjusted by the second rotating component to rotate around its own axis 41 towards the direction closer to the soil pressing plate 1, so that the sealing plate 4 abuts against the corresponding side of the soil pressing plate 1. The sealing plate 4 seals the side of the soil pressing plate 1, thereby forming a concrete cavity between the soil pressing plate 1, the slope, and the four sides of the sealing plate 4. Concrete is poured into the cavity through the mud injection hole. After the concrete solidifies, the sealing plate 4 is pried away from the soil pressing plate 1 by external tools, so that the sealing plate 4 is separated from the concrete. Then, the mounting strip 3 is pried to drive the sealing plate 4 to rotate towards the direction closer to the connecting block 2, so that the mounting strip 3 is separated from the concrete. Then, the soil pressing plate 1 can be pried off the concrete from the side, so that the soil pressing plate 1 can be easily removed from the concrete.

[0037] Reference Figure 4 and Figure 5 To facilitate the adjustment of the rotation of the mounting strip 3, the first rotating component 5 includes a drum 51 and a first pull rope 52. The drum 51 is sleeved on the side of the rotating rod 6 away from the corresponding sealing plate 4. The first pull rope 52 is wound around the drum 51. The first pull rope 52 is used to pull the drum 51 to rotate and unwind the first pull rope 52. When the first pull rope 52 is pulled to unwind the first pull rope 52 from the drum 51, the mounting strip 3 rotates in a direction away from the connecting rail 16.

[0038] Reference Figure 4 and Figure 5 A torsion spring 10 is fitted on the rotating rod 6. One end of the torsion spring 10 is fixedly connected to the soil pressing plate 1, and the other end is fixedly connected to the rotating rod 6. The torsion spring 10 is used to drive the mounting strip 3 to rotate toward the direction close to the connecting rail 16.

[0039] When it is necessary for the soil compaction plate 1 to compact the soil on the surface of the slope, the first pull rope 52 is loosened. Under the action of the torsion spring 10, the rotating rod 6 drives the installation strip 3 to rotate in the direction close to the connecting rail 16, so that the installation strip 3 drives the sealing plate 4 to rise upward. This makes it difficult for the installation strip 3 and the sealing plate 4 to insert into the soil when the soil compaction plate 1 presses against the soil, thereby helping to reduce the resistance when the soil compaction plate 1 compacts the soil.

[0040] When concrete needs to be poured, pull all the first pull ropes 52. The first pull ropes 52 pull the drum 51 to rotate and unwind the first pull ropes 52. The rotating rod 6 drives the installation strip 3 to rotate away from the connecting rail 16 until the installation strip 3 abuts against the side corresponding to the soil pressing plate 1. This helps to form a cavity for pouring concrete between the sealing plate 4, the soil pressing plate 1, and the slope. When it is necessary to remove the soil pressing plate 1 from the solidified concrete, loosen the first pull ropes 52 to make it possible for the installation strip 3 to rotate towards the connecting rail 16. This makes it easier to pry the installation strip 3 off the concrete and facilitates the subsequent separation of the soil pressing plate 1 from the concrete.

[0041] Reference Figure 2 and Figure 4 To facilitate the adjustment of the rotation of the sealing plate 4, the distance from the side of the sealing plate 4 away from the connecting rail 16 to the side of the soil pressing plate 1 near the connecting rail 16 is less than the distance from the side of the sealing plate 4 away from the connecting rail 16 to the side of the sealing plate 4 near the connecting rail 16. The second rotating component includes a second pull rope 7, which is fixedly connected to the side of the sealing plate 4 near the connecting rail 16. The second pull rope 7 is used to pull the sealing plate 4 to rotate in the direction of approaching the soil pressing plate 1. A guide pulley 21 is fixedly installed on the edge of the soil pressing plate 1 near the connecting rail 16. The guide pulley 21 corresponds one-to-one with the sealing plate 4. The second pull rope 7 slides on the corresponding guide pulley 21, which helps to guide the pulling of the second pull rope 7.

[0042] When concrete needs to be poured, pull the second rope 7. The second rope 7 pulls the sealing plate 4 to rotate towards the soil pressing plate 1, so that the sealing plate 4 and the corresponding side of the soil pressing plate 1 abut against each other, thereby forming a cavity for concrete pouring between the sealing plate 4 and the soil pressing plate 1, which facilitates the construction of the support structure for deep foundation pits. When it is necessary to remove the soil pressing plate 1 from the solidified concrete, release the second rope 7. By prying the section of the sealing plate 4 that is higher than the soil pressing plate 1, the sealing plate 4 is rotated away from the soil pressing plate 1, realizing the separation of the four sealing plates 4 from the concrete. This facilitates the rotation of the installation strip 3 towards the connecting rail 16, and thus facilitates the removal of the soil pressing plate 1 from the concrete.

[0043] Reference Figure 2 and Figure 3An operating platform 22 is fixed to the side of the soil-pressing plate 1 near the connecting block 2. The operating platform 22 is located between two connecting rails 16. A rotating rod 8 is rotatably mounted on the side of the operating platform 22 away from the slope. The rotation axis of the rotating rod 8 is perpendicular to the plane of the soil-pressing plate 1. The rotating rod 8 is located between the sealing plates 4 on each side. A winding drum 23 is fixedly sleeved on the rotating rod 8. In this embodiment, one winding drum 23 is provided. The ends of the first pull rope 52 and the second pull rope 7 away from the sealing plate 4 are both wound on the winding drum 23 in the same direction. In other embodiments, two winding drums 23 can be provided. The two winding drums 23 correspond one-to-one with the first pull rope 52 and the second pull rope 7, respectively. The first pull rope 52 and the second pull rope 7 are respectively wound on the corresponding winding drum 23. The diameter of the winding drum 23 is set as needed. A third rotating component 9 is provided on the soil-pressing plate 1 for adjusting or fixing the rotating rod 8.

[0044] Reference Figure 2 and Figure 3 To facilitate adjustment of the rotation or fixation of the rotating rod 8, the third rotating component 9 includes a worm gear 91 and a worm 92. The worm gear 91 is fixedly sleeved on the rotating rod 8 and is located below the winding drum 23. The worm 92 is rotatably mounted on the operating table 22 and meshes with the worm gear 91. A motor 24 is fixedly installed on the operating table 22, and the worm 92 is coaxially fixed with the output shaft of the motor 24. In other embodiments, the motor 24 can be replaced by a handwheel.

[0045] When it is necessary to wind up the first pull rope 52 and the second pull rope 7, the motor 24 is started. The motor 24 drives the worm gear 92 to rotate, which in turn drives the worm wheel 91 and the rotating rod 8 to rotate, causing the winding drum 23 to rotate. This winds up the first pull rope 52 and the second pull rope 7, facilitating the sealing of the four sides of the soil-pressing plate 1 to form a cavity for pouring concrete. When it is necessary to disassemble the soil-pressing plate 1, the motor 24 is started. The motor 24 drives the worm gear 92 to reverse, which in turn drives the worm wheel 91 and the rotating rod 8 to rotate in the opposite direction. This causes the winding drum 23 to unwind the first pull rope 52 and the second pull rope 7, making it easier to use external tools to detach the sealing plate 4 and the mounting strip 3 from the concrete in sequence, thus facilitating the subsequent removal of the soil-pressing plate 1 from the concrete. At the same time, the meshing between the worm wheel 91 and the worm gear 92 has a self-locking function. When the worm gear 92 is not rotating, it locks the rotation of the rotating rod 8.

[0046] Reference Figure 4Each side of the soil pressing plate 1 near the operating platform 22 is fixedly equipped with a support rod 11. In this embodiment, two support rods 11 are arranged opposite each other on each side of the soil pressing plate 1, and the support rods 11 on opposite sides of the soil pressing plate 1 are symmetrically distributed. The length direction of the support rod 11 is perpendicular to the plane of the soil pressing plate 1. A connecting rod 12 is hinged to the support rod 11. The support rod 11 is located between the two ends of the corresponding connecting rod 12. The hinge axis of the connecting rod 12 is parallel to the rotation axis of the corresponding sealing plate 4. The distance from the end of the connecting rod 12 near the corresponding sealing plate 4 to the support rod 11 is less than the distance from the end of the connecting rod 12 away from the corresponding sealing plate 4 to the support rod 11. The abutment rod 12 is used to abut against the sealing plate 4 to push the sealing plate 4 to rotate away from the soil pressing plate 1. The end of the abutment rod 12 away from the corresponding sealing plate 4 is hinged to the connecting rod 13. The end of the connecting rod 13 away from the abutment rod 12 is hinged to the sliding block 14. The sliding block 14 is located on the side of the corresponding abutment rod 12 away from the sealing plate 4. The sliding block 14 is located below the connecting rod 13. The sliding block 14 is slidably set on the soil pressing plate 1. The sliding direction of the sliding block 14 is perpendicular to the hinge axis of the corresponding abutment rod 12. The sliding direction of the sliding block 14 is parallel to the plane of the soil pressing plate 1. The soil pressing plate 1 is provided with an adjusting member for adjusting the two symmetrical sliding blocks 14 on both sides of the soil pressing plate 1 to slide towards or away from the corresponding sealing plate 4.

[0047] Reference Figure 4 To facilitate the adjustment of the sliding block 14 to slide closer to or further away from the corresponding sealing plate 4, an installation block 25 is fixed on the side of the soil pressing plate 1 near the operating table 22. The installation block 25 corresponds to two symmetrical sliding blocks 14. The adjusting component includes a bidirectional screw 15, which is rotatably mounted on the corresponding installation block 25. The rotation axis of the bidirectional screw 15 is parallel to the sliding direction of the sliding blocks 14 on both sides of the soil pressing plate 1. The sliding blocks 14 on both sides of the soil pressing plate 1 are threadedly connected to the two ends of the bidirectional screw 15.

[0048] When it is necessary to detach the sealing plate 4 from the solidified concrete, rotate the two bidirectional screws 15 in the same direction. The rotation of the bidirectional screws 15 drives the two corresponding sliding blocks 14 to move closer to each other, causing the sliding blocks 14 to move away from the corresponding sealing plate 4. This causes the sliding blocks 14 to pull the corresponding connecting rod 13 to move away from the sealing plate 4. The connecting rod 13 drives the abutment rod 12 to rotate, causing the end of the abutment rod 12 near the sealing plate 4 to rise. At this time, the abutment rod 12 generates a pushing force on the sealing plate 4, driving the sealing plate 4 to rotate away from the soil pressing plate 1, which helps to detach the sealing plate 4 from the solidified concrete.

[0049] When concrete needs to be poured on the slope, the two bidirectional screws 15 in the same direction are rotated. The bidirectional screws 15 drive the two corresponding sliding blocks 14 away from each other, so that the sliding blocks 14 slide towards the direction of the corresponding sealing plate 4. The connecting rod 13 pushes the abutment rod 12 to rotate, so that the end of the abutment rod 12 near the sealing plate 4 rotates towards the direction of the soil pressing plate 1, thereby facilitating the sealing plate 4 to seal the side of the soil pressing plate 1 and forming a cavity for concrete pouring.

[0050] The implementation principle of this application embodiment is as follows: In use, the pin 17 is removed from the connecting rail 16, the connecting block 2 is slid along the connecting rail 16 to a suitable position, and then the pin 17 is passed through the corresponding connecting rail 16 and connecting block 2, so that the connecting block 2 is relatively fixed with the soil pressing plate 1. The first movable rod 19 is rotatably connected to the upper connecting block 2 through a pin, and the second movable rod 20 is rotatably connected to the lower connecting block 2 through a pin, so that the position of the soil pressing plate 1 can be relatively fixed without the need for upper and lower limit plates to limit it.

[0051] The motor 24 is started, which drives the worm gear 92 to rotate. The worm gear 92 drives the worm wheel 91 and the rotating rod 8 to rotate, so that the winding drum 23 unwinds the first pull rope 52 and the second pull rope 7. At this time, the mounting strip 3 rotates towards the connecting block 2 under the action of the torsion spring 10, until it is flush with the soil compaction plate 1. Then, the first movable rod 19 and the second movable rod 20 push the soil compaction plate 1 towards the slope, so that the soil compaction plate 1 compacts the loose soil on the slope. At this time, the mounting strip 3 and the sealing plate 4 will not be inserted into the soil, reducing the resistance of soil compaction.

[0052] Then, the first movable rod 19 and the second movable rod 20 drive the soil pressing plate 1 to move a certain distance away from the slope, so that a gap for concrete pouring is formed between the soil pressing plate 1 and the slope. Then, the motor 24 is started, and the motor 24 drives the worm gear 92 to rotate. The worm gear 92 drives the worm wheel 91 and the rotating rod 8 to rotate, so that the winding drum 23 winds up the first pull rope 52 and the second pull rope 7. The first pull rope 52 pulls the drum 51 to rotate, and the drum 51 drives the installation strip 3 to rotate away from the connecting block 2, so that the installation strip 3 can rotate towards the slope. The second pull rope 7 rotates towards the soil pressing plate 1 under the guidance of the guide pulley 21 until the installation strip 3 rotates to abut against the corresponding side of the soil pressing plate 1, and the sealing plate 4 rotates to abut against the corresponding side of the soil pressing plate 1. At this time, the side of the installation strip 3 and the sealing plate 4 away from the connecting block 2 abuts against the slope, so that a cavity for concrete pouring is formed between the soil pressing plate 1, the slope and the sealing plates 4 on all four sides. Concrete is poured into the cavity through the mud injection hole.

[0053] After the concrete has solidified, the motor 24 is started. The motor 24 drives the worm gear 92 to rotate, which in turn drives the worm wheel 91 and the rotating rod 8 to rotate, causing the winding drum 23 to unwind the first pull rope 52 and the second pull rope 7. At this time, the sealing plate 4 can rotate away from the soil-pressing plate 1, and the mounting strip 3 can rotate towards the connecting block 2. Then, the two bidirectional screws 15 in the same direction are rotated. The rotation of the bidirectional screws 15 drives the corresponding two sliding blocks 14 to move closer to each other, causing the sliding blocks 14 to move away from the corresponding sealing plate 4, thereby pulling the corresponding... The connecting rod 13 moves away from the sealing plate 4, causing the abutment rod 12 to rotate and the end of the abutment rod 12 near the sealing plate 4 to rise. At this time, the abutment rod 12 exerts a pushing force on the sealing plate 4, driving the sealing plate 4 to rotate away from the soil pressing plate 1, which helps to separate the sealing plate 4 from the solidified concrete. Then, the installation strip 3 is pried by an external tool to drive the sealing plate 4 to rotate towards the connecting block 2, so that the installation strip 3 is separated from the concrete. Then, the soil pressing plate 1 is pried off from the concrete from the side, thus facilitating the removal of the soil pressing plate 1 from the solidified concrete.

[0054] This application also discloses a construction method for the aforementioned deep foundation pit construction structure. The deep foundation pit construction method includes the following steps:

[0055] Step 1: Excavation of the foundation pit;

[0056] Step 2: Connect the right end of the first movable rod 19 in the support mechanism to the upper connecting block 2 via a pin, and connect the right end of the second movable rod 20 to the lower connecting block 2 via a pin. Start the motor 24, which drives the worm gear 92 to rotate. The worm gear 92 drives the worm wheel 91 and the rotating rod 8 to rotate, so that the winding drum 23 simultaneously unwinds the first pull rope 52 and the second pull rope 7. Under the action of the torsion spring 10, the mounting strip 3 rotates towards the direction closer to the connecting block 2. Then, the first movable rod 19 and the second movable rod 20 move synchronously towards the direction closer to the slope, so that the soil compaction plate 1 compacts the loose soil on the slope.

[0057] Step 3: After compacting the soil on the slope, move the first movable rod 19 and the second movable rod 20 simultaneously in a direction away from the slope, so that the soil compaction plate 1 is separated from the slope and a gap is formed between it and the slope.

[0058] Step 4: Next, start the motor 24. The motor 24 drives the worm 92 to reverse. The worm 92 drives the worm wheel 91 and the rotating rod 8 to rotate, so that the winding drum 23 simultaneously winds up the first pull rope 52 and the second pull rope 7. The first pull rope 52 pulls the drum 51 to rotate. The drum 51 drives the mounting strip 3 to rotate away from the connecting block 2 until it abuts against the corresponding side of the soil pressing plate 1. The second pull rope 7 pulls the sealing plate 4 to rotate towards the soil pressing plate 1 until the sealing plate 4 abuts against the corresponding side of the soil pressing plate 1. At this time, a concrete-poured cavity is formed between the soil pressing plate 1, the slope and the sealing plates 4 on all four sides. Concrete is filled into the cavity through the mud injection hole.

[0059] Step 5: After the filled concrete has solidified, start the motor 24. The motor 24 drives the worm gear 92 to rotate. The worm gear 92 drives the worm wheel 91 and the rotating rod 8 to rotate, so that the winding drum 23 simultaneously unwinds the first pull rope 52 and the second pull rope 7. Then, rotate the two bidirectional screws 15 in the same direction. The bidirectional screws 15 drive the sliding block 14 to move away from the corresponding sealing plate 4, so that the abutment rod 12 pushes the corresponding sealing plate 4 to rotate away from the soil pressing plate 1. Then, use an external tool to pry the installation strip 3 to rotate towards the connecting block 2. Then, pry the side of the soil pressing plate 1 to separate from the concrete, so as to disassemble the soil pressing plate 1, the installation strip 3, the sealing plate 4 and the concrete.

[0060] Step 6: Use the disassembled parts on the slope at the next depth, and repeat the construction steps 1-5 above.

[0061] 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 deep foundation pit construction structure, comprising a soil-pressing plate (1) and two connecting blocks (2) disposed on the side of the soil-pressing plate (1) away from the slope, characterized in that: Each side of the soil compaction plate (1) is provided with two mounting strips (3) that rotate relative to each other. The rotation axis of the mounting strips (3) is parallel to the length direction of the corresponding side of the soil compaction plate (1). The mounting strips (3) extend in a direction away from the connecting block (2). A sealing plate (4) is rotatably provided between the two mounting strips (3) on each side of the soil compaction plate (1). The sealing plate (4) is used to open and close the side of the soil compaction plate (1). The rotation axis (41) of the sealing plate (4) is located at the end of the mounting strip (3) away from the connecting block (2). The rotation axis of the sealing plate (4) is parallel to the rotation axis of the corresponding mounting strip (3). The sealing plate (4) rotates in a direction closer to or away from the soil compaction plate (1). The soil compaction plate (1) is provided with a first rotating member (5) for adjusting the rotation of the mounting strips (3) in a direction closer to or away from the connecting block (2). The soil compaction plate (1) is provided with a sealing member for adjusting the rotation of the sealing strips (3). The blocking plate (4) has a second rotating component that rotates toward or away from the soil pressing plate (1); the mounting strip (3) is provided with a rotating rod (6), which rotates on the corresponding side of the soil pressing plate (1). The rotating rod (6) is located on the side of the soil pressing plate (1) near the connecting block (2). The first rotating component (5) includes a drum (51) sleeved on the rotating rod (6) and a first pull rope (52) wound on the drum (51). The first pull rope (52) is used to pull the corresponding drum (51) to rotate. When the first pull rope (52) is pulled to make the drum (51) unwind the first pull rope (52), the mounting strip (3) rotates toward the direction away from the connecting block (2). The second rotating component includes a second pull rope (7) provided on the side of the blocking plate (4) near the connecting block (2). The second pull rope (7) is used to pull the blocking plate (4) to rotate toward the direction near the soil pressing plate (1).

2. The deep foundation pit construction structure according to claim 1, characterized in that: The soil pressing plate (1) is rotatably provided with a rotating rod (8) on the side near the connecting block (2). The rotating rod (8) is located between the sealing plates (4) on each side. The first pull rope (52) and the second pull rope (7) are both wound around the rotating rod (8) and have the same winding direction. The soil pressing plate (1) is provided with a third rotating component (9) for adjusting or fixing the rotating rod (8).

3. The deep foundation pit construction structure according to claim 2, characterized in that: The third rotating component (9) includes a worm gear (91) sleeved on the rotating rod (8) and a worm (92) rotatably mounted on the soil pressing plate (1), wherein the worm (92) meshes with the worm gear (91).

4. The deep foundation pit construction structure according to claim 1, characterized in that: A torsion spring (10) is fitted on the rotating rod (6). One end of the torsion spring (10) is set on the soil pressing plate (1), and the other end is set on the rotating rod (6). The torsion spring (10) is used to drive the rotating rod (6) to rotate the mounting strip (3) toward the direction close to the connecting block (2).

5. A deep foundation pit construction structure according to claim 1, characterized in that: The distance from the side of the sealing plate (4) away from the connecting block (2) to the side of the soil pressing plate (1) near the connecting block (2) is less than the distance from the side of the sealing plate (4) away from the connecting block (2) to the side of the sealing plate (4) near the connecting block (2). Each side of the soil pressing plate (1) near the connecting block (2) is provided with a support rod (11). The support rod (11) corresponds to the sealing plate (4) on the side closest to it. An abutment rod (12) is hinged on the support rod (11). The support rod (11) is located between the two ends of the corresponding abutment rod (12). The hinge axis of the abutment rod (12) is parallel to the rotation axis of the corresponding sealing plate (4). The end of the abutment rod (12) away from the corresponding sealing plate (4) is inclined upward. The abutment rod (12) is close to the corresponding sealing plate (4). One end of the blocking plate (4) is used to abut against the sealing plate (4) to push the sealing plate (4) to rotate away from the connecting block (2). The end of the abutting rod (12) away from the corresponding sealing plate (4) is hinged to a connecting rod (13). The end of the connecting rod (13) away from the abutting rod (12) is hinged to a sliding block (14). The sliding block (14) is located on the side of the corresponding abutting rod (12) away from the sealing plate (4). The sliding block (14) is slidably disposed on the soil pressing plate (1). The sliding direction of the sliding block (14) is perpendicular to the hinge axis of the corresponding abutting rod (12). The soil pressing plate (1) is provided with an adjusting member for adjusting the sliding blocks (14) on opposite sides of the soil pressing plate (1) to slide towards or away from the corresponding sealing plate (4).

6. A deep foundation pit construction structure according to claim 5, characterized in that: The adjusting component includes a bidirectional screw (15) rotatably mounted on the soil pressing plate (1). The rotation axis of the bidirectional screw (15) is parallel to the sliding direction of the corresponding two-sided sliding blocks (14). The sliding blocks (14) on opposite sides of the soil pressing plate (1) are threadedly connected to the two ends of the corresponding bidirectional screw (15).

7. A deep foundation pit construction structure according to claim 1, characterized in that: The connecting block (2) is slidably disposed on the side of the soil pressing plate (1) away from the slope. The soil pressing plate (1) is provided with connecting rails (16) that slidably cooperate with the connecting block (2). A pin (17) is slidably inserted through the connecting rail (16). The sliding direction of the pin (17) is perpendicular to the sliding direction of the connecting block (2). The connecting rail (16) is provided with multiple adjustment holes (18) for the pin (17) to pass through. The multiple adjustment holes (18) are arranged along the sliding direction of the connecting block (2). The connecting block (2) is provided with fixing holes for the pin (17) to pass through.

8. A construction method for a deep foundation pit construction structure according to any one of claims 1-7, characterized in that, Includes the following steps: Step 1: Excavation of the foundation pit; Step 2: Connect the right ends of the first movable rod (19) and the second movable rod (20) in the support mechanism to the two connecting blocks (2) by means of pins, so that the first movable rod (19) and the second movable rod (20) move synchronously toward the slope, so that the soil compaction plate (1) compacts the loose soil on the slope. Step 3: After compacting the soil on the slope, move the first movable rod (19) and the second movable rod (20) simultaneously away from the slope, so that the soil compaction plate (1) is separated from the slope and a gap is formed between it and the slope. Step 4: Adjust the mounting strip (3) to rotate away from the connecting block (2) by the first rotating part (5) until it abuts against the corresponding side of the soil pressing plate (1). Adjust the sealing plate (4) to rotate towards the soil pressing plate (1) by the second rotating part until the sealing plate (4) abuts against the corresponding side of the soil pressing plate (1), so that a concrete-poured cavity is formed between the soil pressing plate (1), the slope and the sealing plates (4) on the four sides. Fill the cavity with concrete through the mud injection hole. Step 5: After the filling concrete has solidified, pry the sealing plate (4) in sequence to rotate away from the soil pressing plate (1), then pry the installation strip (3) to rotate towards the connecting block (2), and then pry the side of the soil pressing plate (1) to separate it from the concrete, so as to disassemble the soil pressing plate (1), the installation strip (3), the sealing plate (4) from the concrete. Step 6: Use the disassembled parts on the slope at the next depth, and repeat the construction steps 1-5 above.

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