A recyclable support mechanism for foundation pit enclosure

Abstract

The present invention belongs to the technical field of repair or reinforcement of excavated areas in fixed buildings, and in particular, relates to a recyclable support mechanism for foundation pit enclosure. The present invention provides a connecting column at the drill cone at the lower end of the steel pipe pile. When the steel pipe pile is removed outward, the connecting column is disengaged from the steel pipe pile under the drive of the soil, so that the medium sand filled inside the steel pipe pile flows out according to its own gravity, solving the technical problem of clearing the sand filled in the pipe when the support structure is removed. The advantages of the present invention are: when the steel pipe pile is removed outward, the connecting column unit is disengaged from the lower end of the steel pipe pile, so that the medium sand in the steel pipe pile flows out according to its own gravity; fourth, by providing a clamping block unit and a locking pin unit, the act of installing the insert column can directly lock the connecting column and the bottom end of the steel pipe pile; fifth, by providing a reset plate unit, when the steel pipe pile is removed, the connecting column can be smoothly disengaged, so that the drill cone automatically remains in the foundation pit soil.

Description

Technical Field

[0001] The invention belongs to the technical field of repair or reinforcement of excavation in fixed buildings, and in particular relates to a recyclable supporting mechanism for foundation pit enclosure. Background Art

[0002] Urban construction projects, such as factory construction and underground space development, require excavation of foundation pits. To ensure the safety of underground structures and the surrounding environment, support, reinforcement, and protection measures are required for the pit walls and surroundings. Commonly used support structures utilize reusable, simple, and easy-to-install steel sheet piles. However, the limited strength of individual steel sheet piles makes them inadequate for many construction scenarios involving deep and large pits.

[0003] Prior art has proposed a combined steel sheet pile support structure based on a steel pipe and steel sheet pile combination (PUC). This structure not only compensates for the lack of rigidity of the steel sheet piles but also allows the steel pipes to be filled with medium sand to resist pressure. However, this system has the drawback of being difficult to remove during the demolition process after the project is completed. Therefore, a technical solution is urgently needed to facilitate the removal of the sand from the pipes during the dismantling of the support structure. Summary of the Invention

[0004] The purpose of the present invention is to provide a recyclable support mechanism for foundation pit enclosure. The present invention provides a connecting column at the drill cone at the lower end of the steel pipe pile. When the steel pipe pile is removed outward, the connecting column is disengaged from the steel pipe pile under the drive of the soil, so that the medium sand filled in the steel pipe pile flows out according to its own gravity, solving the technical problem of clearing the sand filled in the pipe when the support structure is dismantled.

[0005] The technical solution adopted by the present invention to solve the above-mentioned problem is: a recyclable support mechanism for foundation pit enclosure, including steel pipe piles, a drilling cone arranged at the lower end of the steel pipe piles, and a connecting column unit arranged at the upper end of the drilling cone and used to connect the steel pipe piles; when the steel pipe piles are removed outward, the connecting column unit is disengaged from the lower end of the steel pipe piles.

[0006] A further preferred technical solution is that: the connecting column unit includes a connecting column, an insertion column arranged at the upper end of the connecting column and used to insert into the lower end of the steel pipe pile, and a clamping groove portion arranged on the connecting column; a clamping block groove is provided at the lower end of the steel pipe pile; and it also includes a clamping block unit arranged in the clamping block groove.

[0007] A further preferred technical solution is that: the clamping block unit includes a rotating column and a clamping block arranged at the lower end of the rotating column; the clamping groove portion includes a vertical groove and a circular rotating groove connected to the inner side of the vertical groove.

[0008] A further preferred technical solution is that the clamping block unit also includes a torsion spring arranged in the clamping block groove and used to connect the rotating column, and a lower gear arranged on the rotating column; and also includes a locking pin unit arranged in the clamping block groove and used to prevent the lower gear from rotating.

[0009] A further preferred technical solution is that: the locking pin unit includes a locking pin and a linkage plate arranged at the upper end of the locking pin; the steel pipe pile is also provided with a linkage plate groove connected to the top of the clamping block groove and connected to the inside of the steel pipe pile, and the inner end of the linkage plate is arranged in the linkage plate groove.

[0010] A further preferred technical solution is that: the steel pipe pile is also provided with a reset plate groove connected to the top of the clamping block groove and connected to the outside of the steel pipe pile; it also includes a reset plate unit arranged in the reset plate groove; the reset plate unit includes a reset plate, and a composite gear part for connecting the reset plate and engaging the lower gear.

[0011] A further preferred technical solution is that the composite gear portion includes a rack provided at the inner end of the reset plate, an upper gear meshing with the rack, and a crown gear set meshing with the upper gear and the lower gear.

[0012] A further preferred technical solution is that the locking pin unit further includes a locking block provided on the inner top surface of the linkage plate groove, and a locking groove provided on the top surface of the linkage plate and used for engaging the locking block.

[0013] A further preferred technical solution is that the upper end of the reset plate has a guiding inclined surface.

[0014] A foundation pit protection method uses the above-mentioned recyclable support mechanism for foundation pit protection.

[0015] The advantages of the present invention are:

[0016] First, when the steel pipe pile is removed outward, the connecting column unit is disengaged from the lower end of the steel pipe pile, so that the sand in the steel pipe pile flows out according to its own gravity;

[0017] Second, the split setting of steel pipe piles and connecting column units has the advantage of easy dismantling;

[0018] Third, during lifting, the drilling cone does not follow the lifting, and the medium sand leaks out as the insertion cone and the pipe body separate, and then becomes the backfill soil;

[0019] Fourth, by providing a clamping block unit and a locking pin unit, the act of installing the insert column can directly lock the connecting column and the bottom end of the steel pipe pile;

[0020] Fifth, by setting up the reset plate unit, when the steel pipe pile is removed, the connecting column can be smoothly detached, so that the drilling cone automatically remains in the foundation pit soil. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the entire support mechanism of the present invention.

[0022] Figure 2 for Figure 1 Schematic diagram of the connection between the drilled soil cone and the steel pipe pile.

[0023] Figure 3 Schematic diagram of connecting column units.

[0024] Figure 4 for Figure 3 Schematic diagram of the middle connecting column unit inserted into the steel pipe pile.

[0025] Figure 5 It is a schematic diagram of the connection between the clamping block and the clamping slot, wherein the internal structure of the clamping slot is shown through a cross section.

[0026] Figure 6 for Figure 5 Schematic diagram of the middle clamping block entering the circular rotating groove along the vertical groove.

[0027] Figure 7 for Figure 6 Schematic diagram of the middle rotating column rotating so that the clamping block is clamped at the intersection of the vertical groove and the circular rotating groove.

[0028] Figure 8 It is a schematic diagram of the connection method of the clamping block unit, the locking pin unit and the reset plate unit in the present invention.

[0029] Figure 9 for Figure 8 Schematic diagram showing that the locking pin unit is lifted by the insertion column, causing the clamping block unit to lose its clamping action, thereby driving the reset plate unit to protrude.

[0030] Figure 10 for Figure 9 Schematic diagram showing that the reset plate unit shrinks due to external force, driving the clamping block unit to rotate in the opposite direction.

[0031] Figure 11 for Figure 8 Schematic diagram of the specific structure of the middle clamping block unit, locking pin unit and reset plate unit.

[0032] Figure 12 Schematic diagram of the locking block and locking slot positions.

[0033] In the accompanying drawings, the components represented by each reference numeral are as follows: steel pipe pile 1, steel sheet pile 2, drilling cone 3, connecting column unit 4, clamping block unit 5, locking pin unit 6, reset plate unit 7, connecting column 401, insertion column 402, clamping groove 403, rotating column 501, clamping block 502, torsion spring 503, lower gear 504, locking pin 601, linkage plate 602, locking block 603, locking groove 604, reset plate 701, rack 702, upper gear 703, crown gear set 704, vertical groove 403a, circular rotating groove 403b, clamping block groove c1, linkage plate groove c2, reset plate groove c3. DETAILED DESCRIPTION

[0034] The present invention will be further described in detail below with reference to the accompanying drawings.

[0035] This specific embodiment is merely an explanation of the present invention and is not intended to limit the present invention. After reading this specification, those skilled in the art may make non-creative modifications to this embodiment as needed. However, as long as such modifications are within the scope of the claims of the present invention, they are protected by patent law.

[0036] Example: A recyclable support mechanism for foundation pit enclosure, comprising steel pipe piles 1 and steel sheet piles 2 arranged between the steel pipe piles 1, referring to Figure 1 The cross section of the steel sheet pile 2 is arranged in a trapezoidal opening shape. This type of structure is similar to the structure of existing corrugated paper. The steel sheet pile 2 and the steel pipe pile 1 are plugged into each other and further include a soil drilling cone 3 arranged at the lower end of the steel pipe pile 1, and a connecting column unit 4 arranged at the upper end of the soil drilling cone 3 and used to connect the steel pipe pile 1; Figure 2 The drilling cone 3 and the steel pipe pile 1 body are separately arranged through the connecting column unit 4. When the steel pipe pile 1 is removed outward, the connecting column unit 4 is disengaged from the lower end of the steel pipe pile 1, so that the medium sand in the steel pipe pile 1 flows out according to its own gravity. Among them, the drilling cone 3 is buried in the soil as an abandoned part when the steel pipe pile 1 is removed. Of course, it can also be taken out and continued to be used. Considering that the foundation pit support part generally needs to be backfilled, the drilling cone 3 can be used as a part of the backfill. At the same time, during lifting, the drilling cone 3 does not follow the lifting, and the medium sand leaks out as the drilling cone 3 and the pipe body are separated, and then becomes the backfill soil. In this way, the split setting of the steel pipe pile 1 and the connecting column unit 4 has the advantage of convenient dismantling, thereby ensuring the purpose of rapid construction and stable support without anchor setting.

[0037] In a preferred embodiment, to facilitate the hoisting of the steel pipe pile 1, the support mechanism further includes a hoisting plate disposed at the upper end of the steel pipe pile 1. The hoisting plate is generally rectangular and welded near the top of the steel pipe pile 1. Hoisting holes are provided on the hoisting plate, and the hoisting holes are spaced apart on the hoisting plate. Thus, by hanging a hook on the hoisting hole, the steel pipe pile 1 can be easily lifted using a crane.

[0038] In a preferred embodiment, to facilitate the installation of the steel pipe pile 1 and the steel sheet pile 2, connecting ears are provided on both sides of the steel pipe pile 1, and auxiliary connecting ears are provided at both ends of the steel sheet pile 2 to cooperate with the connecting ears. Both the connecting ears and the auxiliary connecting ears are hook-shaped, and the steel pipe pile 1 and the steel sheet pile 2 are connected by plugging between the connecting ears and the auxiliary connecting ears. This hook-shaped structure not only facilitates insertion and removal, but also, because the force applied is lateral, it is difficult for the two to separate, thereby ensuring integrity while also facilitating assembly and disassembly.

[0039] The connecting column unit 4 includes a connecting column 401, an inserting column 402 provided at the upper end of the connecting column 401 and used to be inserted into the lower end of the steel pipe pile 1, and a clamping groove 403 provided on the connecting column 401; a clamping block groove c1 is provided at the lower end of the steel pipe pile 1; and a clamping block unit 5 is provided in the clamping block groove c1. Figure 3-4 When the connecting column unit 4 is connected to the steel pipe pile 1 from bottom to top, the specific connection method is that the insert column 402 is inserted into the steel pipe pile 1, and the clamping block unit 5 is clamped together with the clamping groove 403 at the upper end of the connecting column 401, completing the fixing of the connecting column unit 4 and the drilling cone 3 below it.

[0040] In a preferred solution, the diameter of the connecting column 401 is slightly larger than the diameter of the steel pipe pile 1. In this way, when the steel pipe pile 1 is removed outward, the soil in the foundation will block the part of the connecting column 401 protruding outside the steel pipe pile 1, causing the clamping groove 403 to pull the clamping block unit 5, thereby breaking the connection between the clamping block unit 5 and the clamping groove 403, thereby causing the connecting column unit 4 and the drilling cone 3 below it to separate from the steel pipe pile 1 above.

[0041] The clamping block unit 5 includes a rotating column 501 and a clamping block 502 provided at the lower end of the rotating column 501; the clamping groove portion 403 includes a vertical groove 403a and a circular rotating groove 403b connected to the inner side of the vertical groove 403a. Figure 5-7 The clamping block unit 5 and the clamping groove portion 403 are clamped in the following manner:

[0042] a card block 502 is vertically disposed in the same direction as the vertical groove 403a, and then inserted downward along the vertical groove 403a until the circular groove 403b;

[0043] b. The rotating column 501 is rotated 90° so that the snap-fit ​​block 502 is perpendicular to the vertical groove 403a to achieve the snap-fit ​​effect.

[0044] Regarding the method for realizing the rotation of the rotating column 501, refer to Figure 8-12 , the clamping block unit 5 also includes a torsion spring 503 provided in the clamping block groove c1 and used to connect the rotating column 501, and a lower gear 504 provided on the rotating column 501; and also includes a locking pin unit 6 provided in the clamping block groove c1 and used to prevent the lower gear 504 from rotating. The torsion spring 503 can make the rotating column 501 rotate 90°, so as to serve as a power source for the rotation of the rotating column 501. The locking pin unit 6 includes a locking pin 601 and a linkage plate 602 provided at the upper end of the locking pin 601; the steel pipe pile 1 is also provided with a linkage plate groove c2 which is connected to the top of the clamping block groove c1 and to the inside of the steel pipe pile 1, and the inner end of the linkage plate 602 is provided in the linkage plate groove c2. Reference Figure 8 When the insertion column 402 is not inserted into the steel pipe pile 1, the locking pin 601 is stuck between the teeth of the lower gear 504, preventing the lower gear 504 from rotating. When the insertion column 402 is inserted into the steel pipe pile 1, the locking pin 601 is released from the engagement state, allowing the lower gear 504 to rotate. Driven by the torsion spring 503, step b of the above-mentioned engagement method is achieved, completing the engagement state. This design has the advantage of linking the actions of "installing the insertion column 402" and "locking the connecting column 401 to the bottom end of the steel pipe pile 1," eliminating the need for additional fixing steps and improving work efficiency.

[0045] In order to ensure that the connection column 401 can be smoothly disengaged when the steel pipe pile 1 is removed, the steel pipe pile 1 is further provided with a reset plate groove c3 that is connected to the upper part of the clamping block groove c1 and is connected to the outside of the steel pipe pile 1; and further includes a reset plate unit 7 disposed in the reset plate groove c3; the reset plate unit 7 includes a reset plate 701 and a composite gear portion for connecting the reset plate 701 and engaging the lower gear 504. When the connection column 401 rotates, the reset plate 701 is simultaneously driven to protrude outward under the action of the composite gear portion, referring to Figure 10When the steel pipe pile 1 is removed upward, the reset plate 701 is subjected to downward pressure from the foundation pit soil. Since the upper end of the reset plate 701 has a guiding slope, this pressure is converted into a force that pushes the reset plate 701 to slide inward, thereby driving the connecting column 401 to rotate in the opposite direction through the composite gear portion, causing the clamping block 502 to disengage from the clamping groove 403. The advantage of this design is that compared to simply using the friction of the soil to break the clamping block 502 or the rotating column 501, this method of disengaging the clamping block 502 from the clamping groove 403 is more stable. The former method often results in the drilling cone 3 remaining on the steel pipe pile 1 after it is completely removed from the foundation pit, resulting in the inability to discharge the medium sand in time, causing trouble for subsequent construction.

[0046] During the disengagement of the soil drilling cone 3, the insert column 402 also disengages from the steel pipe pile 1, which causes the linkage plate 602 to lose its supporting force. Sometimes, when the clamping block 502 is not completely disengaged from the circular groove 403b, the locking pin 601 is stuck on the lower gear 504, causing the disengagement to fail. Figure 12 In a preferred embodiment, the locking pin unit 6 further includes a locking block 603 disposed on the inner top surface of the linkage plate slot c2, and a locking groove 604 disposed on the top surface of the linkage plate 602 for engaging the locking block 603. When the linkage plate 602 is inserted into the column 402 and pushed to the top, the locking groove 604 engages with the locking block 603 under the pressure of the insertion column 402. Since the locking block 603 has the property of expansion locking, once the locking groove 604 engages with it, the locking block 603 will remain engaged with the locking groove 604 without the aid of external force, so that the locking pin 601 will no longer affect the rotation of the lower gear 504.

[0047] After the supporting mechanism is recovered, if it is ready for next use, the reset plate 701 is pushed back along the reset plate groove c3, and then the linkage plate 602 is pulled down so that the locking pin 601 locks the lower gear 504 to complete the reset of the steel pipe pile 1.

[0048] In addition, in a preferred solution, a pointed cone structure may be provided below the reset plate 701 to facilitate breaking the soil during the downward installation of the steel pipe pile 1 and reduce obstruction.

[0049] It should be noted that the connection between the clamping block groove c1 and the clamping 502, and the connection between the reset plate groove c3 and the reset plate 701 are all tightly connected, so that the foundation pit soil will not invade the inside of the clamping block groove c1 during the movement, causing damage to the parts.

[0050] In addition, the same or similar reference numerals are used in the drawings and description to refer to the same or similar parts or steps whenever possible. The drawings are presented in simplified form and are not drawn to exact scale. For convenience and clarity only, directional terms such as top, bottom, left, right, upward, above, above, below, below, rear, and front may be used in the drawings. These and similar directional terms should not be construed as limiting the scope of this disclosure in any way.

Claims

1. A recyclable support mechanism for foundation pit enclosure, comprising a steel pipe pile (1), characterized in that: The invention also includes a soil drilling cone (3) arranged at the lower end of the steel pipe pile (1), and a connecting column unit (4) arranged at the upper end of the soil drilling cone (3) and used to connect the steel pipe pile (1); when the steel pipe pile (1) is removed outward, the connecting column unit (4) and the lower end of the steel pipe pile (1) are disengaged; the connecting column unit (4) includes a connecting column (401), an insertion column (402) arranged at the upper end of the connecting column (401) and used to be inserted into the lower end of the steel pipe pile (1), and a clamping groove (403) arranged on the connecting column (401); the lower end of the steel pipe pile (1) is provided with a clamping block groove (c1); the invention also includes a clamping block unit (5) arranged in the clamping block groove (c1); the clamping block unit (5) includes a rotating column (501) and a clamping block (502) arranged at the lower end of the rotating column (501); the clamping groove (403) 3) includes a vertical groove (403a) and a circular rotation groove (403b) connected to the inner side of the vertical groove (403a); the clamping block unit (5) also includes a torsion spring (503) arranged in the clamping block groove (c1) and used to connect the rotation column (501), and a lower gear (504) arranged on the rotation column (501); and also includes a locking pin unit (6) arranged in the clamping block groove (c1) and used to prevent the lower gear (504) from rotating; the steel pipe pile (1) is also provided with a reset plate groove (c3) connected to the upper side of the clamping block groove (c1) and connected to the outside of the steel pipe pile (1); and also includes a reset plate unit (7) arranged in the reset plate groove (c3); the reset plate unit (7) includes a reset plate (701) and a composite gear part used to connect the reset plate (701) and mesh with the lower gear (504).

2. A recyclable support mechanism for foundation pit enclosure according to claim 1, characterized in that: The locking pin unit (6) comprises a locking pin (601) and a linkage plate (602) arranged at the upper end of the locking pin (601); the steel pipe pile (1) is further provided with a linkage plate groove (c2) which is in communication with the upper portion of the clamping block groove (c1) and is in communication with the interior of the steel pipe pile (1); the inner end of the linkage plate (602) is arranged in the linkage plate groove (c2).

3. The recyclable support mechanism for foundation pit enclosure according to claim 1, characterized in that: The composite gear portion includes a rack (702) arranged at the inner end of the reset plate (701), an upper gear (703) meshing with the rack (702), and a crown gear set (704) meshing with the upper gear (703) and the lower gear (504).

4. The recyclable support mechanism for foundation pit enclosure according to claim 2, characterized in that: The locking pin unit (6) further comprises a locking block (603) arranged on the inner top surface of the linkage plate slot (c2), and a locking slot (604) arranged on the top surface of the linkage plate (602) and used to engage the locking block (603).

5. The recyclable support mechanism for foundation pit protection according to claim 1, characterized in that: The upper end of the reset plate (701) has a guiding slope.

6. A foundation pit protection method, characterized in that: Use the recyclable support mechanism for foundation pit protection as described in any one of claims 1 to 5.

Images