Construction method for adjusting relative position of freezing pipe for freezing water stop between piles

Abstract

The invention discloses a construction method for adjusting the relative position of a freezing pipe for freezing water stop between piles. The construction method comprises the steps that S1, a reinforcement cage is constructed; s2, freezing pipe construction, wherein a gear mechanism and a lifting lug are welded to the outer wall of the freezing pipe, and a driving motor is connected with the freezing pipe; the freezing pipe is lowered into the reinforcement cage, and the gear mechanism is made to be meshed with the gear on the inner ring stirrup; and S3, precision adjustment is conducted, specifically, the reinforcement cages are hoisted, the upper reinforcement cage and the lower reinforcement cage are aligned, a gear mechanism is driven by a driving motor, the freezing pipe moves around the inner ring stirrup, the position of the freezing pipe is adjusted, and the upper freezing pipe and the lower freezing pipe are lowered along with the reinforcement cages after being welded and fixed. The construction method for lowering the freezing pipe along with the reinforcement cage is transformed, the high-precision requirement for lowering the freezing pipe along with the reinforcement cage can be met, and the labor cost and the alignment time are greatly saved.

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, freezing pipe construction: welding gear mechanism and lifting lug on the outer wall of the freezing pipe, and connecting the driving motor with the freezing pipe; the freezing pipe is lowered into the steel cage, so that the gear mechanism is engaged with the gear on the inner hoop reinforcement;

[0009] S3, precision adjustment: hoisting the steel cage, aligning the upper steel cage with the lower steel cage, driving the gear mechanism by the driving motor, so that the freezing pipe moves around the inner hoop reinforcement, realizing the position adjustment of the freezing pipe. After the upper freezing pipe and the lower freezing pipe are welded and fixed, the steel cage is lowered.

[0010] Preferably, the freezing pipe is located between the outer hoop reinforcement and the inner hoop reinforcement, the gear mechanism is sleeved on the outer wall of the freezing pipe, the inner ring gear is arranged on the outer circumferential surface of the inner hoop reinforcement corresponding to the freezing pipe, and the inner ring gear is engaged with the gear mechanism.

[0011] Preferably, the gear mechanism comprises a first gear and a first bearing, the first bearing is fixedly sleeved on the outer wall of the freezing pipe, the first gear is arranged on the outer surface of the first bearing in a circumferential direction, and the first gear is engaged with the inner ring gear.

[0012] Preferably, the gear mechanism comprises a shaft sleeve and a shaft sleeve limit, the shaft sleeve is fixedly sleeved on the outer wall of the freezing pipe, the shaft sleeve limit is welded on the outer wall of the freezing pipe below the shaft sleeve, the first gear is arranged on the outer wall of the shaft sleeve in a circumferential direction, and the first gear is engaged with the 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 second bearing is arranged at both ends of the driving motor shell, the second bearing is welded and fixed with the outer wall of the freezing pipe through the connecting piece, the second gear is sleeved on the motor shaft of the driving motor, and the second gear is engaged with the first gear of the gear mechanism.

[0015] Preferably, the outer hoop reinforcement is welded on the outer surface of the longitudinal reinforcement of the steel cage in a vertical and parallel manner, the inner hoop reinforcement is fixedly connected with the outer hoop reinforcement located at the middle section of the longitudinal reinforcement of the steel cage through the uniformly distributed connecting steel plates, and the electric hoist is located on the outer hoop reinforcement at the uppermost part of the steel cage.

[0016] Preferably, in step S3, the driving motor works, the second gear sleeved on the motor shaft drives the first gear engaged with the second gear to rotate, the first gear moves around the inner hoop reinforcement through the inner ring gear engaged with the first gear, and the position adjustment of the freezing pipe is realized.

[0017] Preferably, in step S3, the hinge end of the electric hoist is connected with the lifting lug on the freezing pipe, and the vertical position of the upper freezing pipe is adjusted through the electric hoist when each section of the freezing pipe is lowered.

[0018] Preferably, after the end of the lowering in the step S3, according to the vertical hole inclinometer result, when there is deflection, the position of the freezing pipe is adjusted again by the driving motor.

[0019] The technical scheme of the present application achieves the following beneficial technical effects:

[0020] 1. The present application improves the construction method of lowering the freezing pipe along with the reinforcement cage, adjusts the position of the freezing pipe by the driving motor, can ensure the accuracy during the lowering stage, and can further ensure the accuracy by adjusting the freezing pipe again by the driving motor according to the vertical hole inclinometer result after the end of the lowering, so that the high-precision requirement of lowering the freezing pipe along with the reinforcement cage can be achieved.

[0021] 2. In the present application, the relative position of the freezing pipe in the horizontal direction is adjusted by the driving motor during the lowering of the freezing pipe, the interval distance between the pipe sections is adjusted by the electric hoist, the position of the upper freezing pipe in the vertical direction is adjusted by the lifting lug and the electric hoist when each section of the freezing pipe is lowered, welding is facilitated, and compared with the traditional construction method in which a plurality of workers repeatedly adjust the lifting point and pry the correction, the present application greatly saves the labor cost and the alignment time. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 Fig. 1 is a pile freezing schematic diagram of the present application;

[0023] Figure 2 Fig. 2 is a schematic diagram of the construction method of the present application;

[0024] Figure 3 Fig. 3 is a top view of the connection structure of the freezing pipe and the reinforcement cage of the present application;

[0025] Figure 4 Fig. 4 is a front view of the present application; Figure 3 Fig. 5 is a front view of the present application;

[0026] Figure 5 Fig. 6 is a schematic diagram of the gear mechanism structure of the present application;

[0027] Figure 6 Fig. 7 is a schematic diagram of another embodiment of the gear mechanism structure of the present application.

[0028] The reference signs in the drawings are as follows: 1-outer hoop reinforcement; 2-inner hoop reinforcement; 21-inner ring gear; 3-connection steel plate; 4-reinforcement cage longitudinal reinforcement; 5-freezing pipe; 6-gear mechanism; 61-first bearing; 62-first gear; 63-axle sleeve limit; 64-axle sleeve; 7-driving motor; 71-second gear; 72-second bearing; 8-connection piece; 9-lifting lug; 10-electric hoist; 11-reinforcement cage. DETAILED DESCRIPTION

[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 sleeved on the outer wall of the freezing pipe 5, the outer wall of the first bearing 61 is provided with the first gear 62 in the circumferential direction, and the first gear 62 is engaged with the inner ring gear 21. The first bearing 61 can reduce friction resistance during gear operation, ensure stable gear axis and smooth rotation, and adapt to high-precision transmission scenarios.

[0037] As shown in the figure, Figure 6 In this embodiment, the gear mechanism 6 includes a shaft sleeve 64 and a shaft sleeve limiting piece 63. The shaft sleeve 64 is fixedly sleeved on the outer wall of the freezing pipe 5, and the shaft sleeve limiting piece 63 is welded on the outer wall of the freezing pipe 5 below the shaft sleeve 64. The outer wall of the shaft sleeve 64 is provided with the first gear 62 in the circumferential direction, and the first gear 62 is engaged with the inner ring gear 21. The structure is simple, the processing cost is low, the shaft sleeve installation space requirement is low, and the adaptability is strong. In the face of the downhole environment, even if a small amount of dust and impurities enter the gap between the shaft sleeve and the freezing pipe, it is not easy to be stuck, and the situation of not being able to roll occurs.

[0038] As shown in the figure, Figure 4 The vertical height of the first gear 62 is the same as the vertical height of the inner ring gear 21, which ensures uniform contact and realizes no-backlash engagement and constant transmission ratio, avoids transmission impact and precision deviation, and meets the smooth and precise power transmission requirements.

[0039] As shown in the figure, Figure 4 The second bearing 72 is welded and fixed with the outer wall of the freezing pipe 5 through the connecting piece 8. The second gear 71 is sleeved on the motor shaft of the driving motor 7, and the second gear 71 is engaged with the first gear 62 of the gear mechanism 6. When the driving motor 7 works, the second gear 71 mounted on the motor shaft drives the first gear 62 engaged with it to rotate. The first gear 62 moves around the inner ring hoop 2 through the inner ring gear 21 engaged with it, and realizes the position adjustment of the freezing pipe 3.

[0040] Obviously, the above embodiments are only examples for clearly illustrating, and not limiting the embodiments. For ordinary skilled in the art, other different forms of changes or variations can be made on the basis of the above description. Here, all the embodiments need not and cannot be exhausted. The obvious changes or variations derived therefrom are still within the protection scope of the patent application claims.

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 (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).

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 (3).

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 (3). When lowering each section of the freezing tube (3), the vertical position of the upper freezing tube (3) 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 (3) is adjusted a second time by driving the motor (7) according to the vertical hole inclination measurement results.

Images