A method for adjusting relative position of freezing pipes for inter-pile freezing water stop

Abstract

The application discloses a kind of relative position adjustment construction methods of freezing pipe of freezing water between piles, including S1, reinforcement cage construction;S2, freezing pipe construction: gear mechanism and lug are welded on the outer wall of freezing pipe, and driving motor is connected with freezing pipe;Freezing pipe is lowered to the reinforcement cage, so that gear mechanism is engaged with the gear on inner hoop reinforcement;S3, precision adjustment: hoist reinforcement cage, upper reinforcement cage is aligned with lower reinforcement cage, gear mechanism is driven by driving motor, so that freezing pipe moves around inner hoop reinforcement, realizes the position adjustment of freezing pipe, after upper freezing pipe and lower freezing pipe are welded and fixed, with reinforcement cage is lowered.This application is reformed to the lowering construction method of freezing pipe with reinforcement cage, can realize the high-precision requirement of freezing pipe with reinforcement cage lowering, greatly saves artificial cost and alignment time.

Description

Technical Field

[0001] This invention relates to the field of artificial ground freezing construction technology for underground engineering. Specifically, it is a construction method for adjusting the relative position of freezing pipes for inter-pile freezing and water sealing. Background Technology

[0002] Artificial ground freezing is a special ground reinforcement technique that uses artificial refrigeration technology to transform natural water-bearing soil and rock into artificial frozen soil by circulating low-temperature brine in freezing pipes. This significantly improves the strength and stability of the original strata, forming a continuous frozen wall that can resist soil and rock pressure and effectively isolate groundwater. Construction activities are then carried out using this frozen wall as support.

[0003] In shaft construction, cast-in-place concrete piles are often used as the retaining structure for shaft excavation. However, in water-rich and soft strata, water seepage can easily occur through the gaps between the concrete piles. To ensure the water-stopping effect of the concrete retaining structure, such as... Figure 1 As shown, existing technologies typically involve laying freezing pipes between piles. These pipes lower the ground temperature, causing the soil near the piles to form frozen soil cylinders that interlock with the concrete piles, achieving a sealing and waterproofing effect. However, in actual construction, the accuracy of the freezing pipe placement directly determines the quality of the frozen soil cylinder formation and the waterproofing effect. The freezing pipes, when lowered along with the reinforcing cage, require high precision. If the freezing pipes deviate, tilt, or deviate in position during placement, the frozen soil formed by adjacent pipes may not effectively connect, resulting in cracks in the frozen soil wall and potential water seepage. Furthermore, deviated freezing pipes may collide with the concrete piles, causing damage to the pipes or the pile structure. This not only necessitates re-laying the freezing pipes, increasing construction costs and delays, but may also compromise the stability of the maintenance structure, creating safety hazards. Summary of the Invention

[0004] Therefore, the technical problem to be solved by the present invention is to provide a construction method for adjusting the relative position of the freezing pipe in the inter-pile freezing and water-stopping project, which can effectively solve the problem of insufficient accuracy in the lowering of the freezing pipe in the inter-pile freezing project.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution:

[0006] A construction method for adjusting the relative position of the freezing pipe for inter-pile freezing and water sealing includes the following steps:

[0007] S1. Reinforcing cage construction: Install an electric hoist on the outer ring stirrups of the reinforcing cage to fix the inner ring stirrups inside the outer ring stirrups of the reinforcing cage;

[0008] S2. Construction of the freezing pipe: Weld the gear mechanism and lifting lugs to the outer wall of the freezing pipe, and connect the drive motor to the freezing pipe; lower the freezing pipe into the steel cage so that the gear mechanism meshes with the gears on the inner ring stirrups;

[0009] S3. Precision Adjustment: Lift the steel cage, align the upper and lower steel cages, and use the drive motor to drive the gear mechanism to make the freezing pipe move around the inner ring stirrup, thereby adjusting the position of the freezing pipe. After the upper and lower freezing pipes are welded and fixed, they are lowered along with the steel cage.

[0010] Preferably, the freezing tube is located between the outer ring stirrup and the inner ring stirrup, and a gear mechanism is fitted on the outer wall of the freezing tube. An inner ring gear is installed on the outer circumferential surface of the inner ring stirrup corresponding to the freezing tube, and the inner ring gear is meshed with the gear mechanism.

[0011] Preferably, the gear mechanism includes a first gear and a first bearing. The first bearing is fixedly mounted on the outer wall of the freezing tube. The first gear is provided circumferentially on the outer side of the first bearing and meshes with the inner ring gear.

[0012] Preferably, the gear mechanism includes a bushing and a bushing limiter. The bushing is fixedly fitted onto the outer wall of the freezing tube. The bushing limiter is welded onto the outer wall of the freezing tube located above and below the bushing. A first gear is provided circumferentially on the outer wall of the bushing and meshes with an inner ring gear.

[0013] Preferably, the vertical height of the first gear is the same as the vertical height of the inner ring gear.

[0014] Preferably, the drive motor housing is equipped with second bearings at both ends, and the second bearings are welded to the outer wall of the freezing tube via connectors. A second gear is mounted on the motor shaft of the drive motor, and the second gear meshes with the first gear of the gear mechanism.

[0015] Preferably, the outer ring stirrups are evenly distributed and welded parallel to the longitudinal bars of the steel cage in the vertical direction. The inner ring stirrups are fixedly connected to the outer ring stirrups located in the middle section of the longitudinal bars of the steel cage by evenly distributed connecting steel plates. The electric hoist is located on the outer ring stirrup at the top of the steel cage.

[0016] Preferably, in step S3 above, the drive motor operates, and the second gear mounted on the motor shaft drives the first gear meshing with it to rotate. The first gear moves around the inner ring rib through the inner ring gear meshing with it, thereby adjusting the position of the freezing tube.

[0017] Preferably, in step S3 above, one end of the hinge of the electric hoist is connected to the lifting lug on the freezing pipe, and the vertical position of the upper freezing pipe is adjusted by the electric hoist when lowering each section of the freezing pipe.

[0018] Preferably, after the above step S3 is completed, if there is a deviation, the position of the freezing tube is adjusted again by driving the motor according to the vertical hole inclination measurement result.

[0019] The technical solution of the present invention achieves the following beneficial technical effects:

[0020] 1. This invention modifies the construction method of lowering the freezing pipe along with the reinforcing cage. By using a drive motor to adjust the position of the freezing pipe, accuracy can be guaranteed not only during the lowering stage, but also after the lowering is completed, the freezing pipe can be precisely adjusted again by the drive motor based on the vertical hole inclination measurement results, further ensuring accuracy. This can achieve the high precision requirement of lowering the freezing pipe along with the reinforcing cage.

[0021] 2. In the process of lowering the freezing pipe, the present invention adjusts the horizontal relative position of the freezing pipe by driving the motor and adjusts the interval distance of the pipe sections by controlling the electric hoist. When lowering each section of the freezing pipe, the vertical position of the upper freezing pipe can be adjusted by the lifting lug and the electric hoist, which facilitates welding. Compared with the traditional construction method that requires multiple workers to repeatedly adjust the lifting points and pry and correct the alignment, the present invention greatly saves labor costs and alignment time. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the inter-pile freezing method for adjusting the relative position of the freezing pipe in the inter-pile freezing and water-stopping construction method of the present invention.

[0023] Figure 2 This is a schematic diagram of the construction method of the present invention;

[0024] Figure 3 This is a top view of the connection structure between the freezing pipe and the reinforcing cage of the present invention;

[0025] Figure 4 For the present invention Figure 3 The main view;

[0026] Figure 5 This is a schematic diagram of the gear mechanism structure of the present invention;

[0027] Figure 6 This is a schematic diagram of another embodiment of the gear mechanism of the present invention.

[0028] The reference numerals in the figure are as follows: 1-Outer ring stirrup; 2-Inner ring stirrup; 21-Inner ring gear; 3-Connecting steel plate; 4-Longitudinal reinforcement of the steel cage; 5-Freezing pipe; 6-Gear mechanism; 61-First bearing; 62-First gear; 63-Sleeve limit; 64-Sleeve; 7-Drive motor; 71-Second gear; 72-Second bearing; 8-Connecting piece; 9-Lifting ring; 10-Electric hoist; 11-Steel cage. Detailed Implementation

[0029] This embodiment describes the construction method for adjusting the relative position of the freezing pipe for inter-pile freezing and water sealing, as follows: Figure 2 As shown, it includes the following steps:

[0030] S1. Construction of the steel cage: Install an electric hoist 10 on the outer ring stirrup 1 of the steel cage 11 and fix the inner ring stirrup 2 inside the outer ring stirrup 1 of the steel cage 11.

[0031] S2. Construction of the freezing pipe: Weld the gear mechanism 6 and the lifting lug 9 to the outer wall of the freezing pipe 5, and connect the drive motor 7 to the freezing pipe 5; lower the freezing pipe 5 into the steel cage 11 so that the gear mechanism 6 meshes with the gear on the inner ring stirrup 2;

[0032] S3. Precision Adjustment: Lift the steel cage 11, align the upper steel cage 11 with the lower steel cage 11, connect one end of the hinge of the electric hoist 10 to the lifting lug 9 on the freezing pipe 3, and adjust the vertical position of the upper freezing pipe 3 by using the electric hoist 10 when lowering each section of the freezing pipe 3; drive the gear mechanism 6 through the drive motor 7 to make the freezing pipe 3 move around the inner ring stirrup 2 to adjust the position of the freezing pipe 3. After the upper freezing pipe 3 and the lower freezing pipe 3 are welded and fixed, they are lowered with the steel cage 11. After being lowered to the appropriate position, the electric hoist 10 can be removed for easy installation on the next section of the steel cage 11.

[0033] S4. Secondary Adjustment: After the lowering is completed, based on the vertical hole inclination measurement results, if there is any deviation, the position of the freezing tube 3 is precisely adjusted a second time by driving motor 7 to further ensure accuracy.

[0034] like Figure 2 As shown, in this embodiment, the outer ring stirrups 1 are evenly distributed and welded parallel to the outside of the longitudinal reinforcement 4 of the steel cage. The inner ring stirrups 2 are fixedly connected to the outer ring stirrups 1 located in the middle section of the longitudinal reinforcement 4 of the steel cage by evenly distributed connecting steel plates 3, which can ensure the stability of the center of gravity. The outer wall of the freezing pipe 5 is equipped with a lifting ring 9, which is located on the upper part of the gear mechanism 6. The electric hoist 10 is located on the outer ring stirrup 1 at the top of the steel cage 11.

[0035] In this embodiment, as Figure 3 , 4 As shown, the freezing tube 5 is located between the outer ring stirrup 1 and the inner ring stirrup 2. The outer wall of the freezing tube 5 is fitted with a gear mechanism 6. The outer circumferential surface of the inner ring stirrup 2 corresponding to the freezing tube 5 is equipped with an inner ring gear 21, which meshes with the gear mechanism 6.

[0036] like Figure 5As shown, the gear mechanism 6 includes a first gear 62 and a first bearing 61. The first bearing 61 is fixedly mounted on the outer wall of the freezing tube 5. The first gear 62 is provided on the outer circumference of the first bearing 61 and meshes with the inner ring gear 21. The first bearing 61 can reduce frictional resistance when the gear is running, ensuring the stability of the gear axis and smooth rotation, and is suitable for high-precision transmission scenarios.

[0037] like Figure 6 As shown, in this embodiment, the gear mechanism 6 includes a bushing 64 and a bushing limiter 63. The bushing 64 is fixedly fitted onto the outer wall of the freezing pipe 5. The bushing limiter 63 is welded onto the outer wall of the freezing pipe 5 located above and below the bushing 64. A first gear 62 is provided circumferentially on the outer wall of the bushing 64 and meshes with the inner ring gear 21. The structure is simple, the processing cost is low, the bushing installation space requirement is low, and the adaptability is strong. In the face of the downhole environment, even if a small amount of dust or impurities enter the gap between the bushing and the freezing pipe, it is not easy to get stuck and cause the rolling failure to occur.

[0038] like Figure 4 As shown, the vertical height of the first gear 62 is the same as that of the inner ring gear 21, ensuring uniform contact, achieving backlash-free meshing and a constant transmission ratio, avoiding transmission impact and accuracy deviation, and meeting the requirements for smooth and precise power transmission.

[0039] like Figure 4 As shown, the drive motor 7 has a second bearing 72 installed at both ends of its housing. The second bearing 72 is welded and fixed to the outer wall of the freezing tube 5 via a connector 8. A second gear 71 is mounted on the motor shaft of the drive motor 7. The second gear 71 meshes with the first gear 62 of the gear mechanism 6. When the drive motor 7 is working, the second gear 71 mounted on the motor shaft drives the first gear 62 meshing with it to rotate. The first gear 62 moves around the inner ring rib 2 through the inner ring gear 21 meshing with it, thereby adjusting the position of the freezing tube 3.

[0040] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of the claims of this patent application.

Claims

1. A construction method for adjusting the relative position of freezing pipes in inter-pile freezing and water-stopping systems, characterized in that, Includes the following steps: S1. Construction of the steel cage: Install an electric hoist (10) on the outer ring stirrup (1) of the steel cage (11) and fix the inner ring stirrup (2) inside the outer ring stirrup (1) of the steel cage (11); S2, construction of the freezing pipe: weld the gear mechanism (6) and the lifting lug (9) on the outer wall of the freezing pipe (5), and connect the drive motor (7) to the freezing pipe (5); lower the freezing pipe (5) into the steel cage (11) so that the gear mechanism (6) meshes with the gear on the inner ring stirrup (2); S3. Precision adjustment: Lift the steel cage (11), align the upper steel cage (11) with the lower steel cage (11), drive the gear mechanism (6) through the drive motor (7) to make the freezing pipe (5) move around the inner ring stirrup (2) to adjust the position of the freezing pipe (5). After the upper freezing pipe (5) and the lower freezing pipe (5) are welded and fixed, they are lowered with the steel cage (11).

2. The construction method for adjusting the relative position of the freezing pipe for inter-pile freezing and water stopping according to claim 1, characterized in that, The freezing tube (5) is located between the outer ring stirrup (1) and the inner ring stirrup (2). The outer wall of the freezing tube (5) is fitted with a gear mechanism (6). The outer circumferential surface of the inner ring stirrup (2) corresponding to the freezing tube (5) is equipped with an inner ring gear (21). The inner ring gear (21) meshes with the gear mechanism (6).

3. The construction method for adjusting the relative position of the freezing pipe for inter-pile freezing and water stopping according to claim 2, characterized in that, The gear mechanism (6) includes a first gear (62) and a first bearing (61). The first bearing (61) is fixedly mounted on the outer wall of the freezing tube (5). The first gear (62) is provided on the outer circumference of the first bearing (61) and meshes with the inner ring gear (21).

4. The construction method for adjusting the relative position of the freezing pipe for inter-pile freezing and water stopping according to claim 2, characterized in that, The gear mechanism (6) includes a bushing (64) and a bushing limiter (63). The bushing (64) is fixedly fitted on the outer wall of the freezing tube (5). The bushing limiter (63) is welded on the outer wall of the freezing tube (5) located above and below the bushing (64). A first gear (62) is provided circumferentially on the outer wall of the bushing (64) and meshes with the inner ring gear (21).

5. The construction method for adjusting the relative position of the freezing pipe for inter-pile freezing and water stopping according to claim 3 or 4, characterized in that, The vertical height of the first gear (62) is the same as the vertical height of the inner ring gear (21).

6. The construction method for adjusting the relative position of the freezing pipe for inter-pile freezing and water stopping according to claim 1, characterized in that, The drive motor (7) housing is equipped with a second bearing (72) at both ends. The second bearing (72) is welded to the outer wall of the freezing tube (5) via a connector (8). A second gear (71) is mounted on the motor shaft of the drive motor (7). The second gear (71) meshes with the first gear (62) of the gear mechanism (6).

7. The construction method for adjusting the relative position of the freezing pipe for inter-pile freezing and water stopping according to claim 1, characterized in that, The outer ring stirrups (1) are evenly distributed and welded to the outside of the longitudinal bars (4) of the steel cage. The inner ring stirrups (2) are fixedly connected to the outer ring stirrups (1) located in the middle section of the longitudinal bars (4) of the steel cage by evenly distributed connecting steel plates (3). The electric hoist (10) is located on the outer ring stirrups (1) at the top of the steel cage (11).

8. The construction method for adjusting the relative position of the freezing pipe for inter-pile freezing and water stopping according to claim 1, characterized in that, In step S3, the drive motor (7) operates, and the second gear (71) mounted on the motor shaft drives the first gear (62) meshing with it to rotate. The first gear (62) moves around the inner ring rib (2) through the inner ring gear (21) meshing with it, thereby adjusting the position of the freezing tube (5).

9. The construction method for adjusting the relative position of the freezing pipe for inter-pile freezing and water stopping according to claim 1, characterized in that, In step S3, one end of the hinge of the electric hoist (10) is connected to the lug (9) on the freezing tube (5). When lowering each section of the freezing tube (5), the vertical position of the upper freezing tube (5) is adjusted by the electric hoist (10).

10. The construction method for adjusting the relative position of the freezing pipe for inter-pile freezing and water stopping according to claim 1, characterized in that, After the lowering of step S3 is completed, if there is a deviation, the position of the freezing tube (5) is adjusted again by the drive motor (7) according to the vertical hole inclination measurement results.

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