A method for lifting a large-section steel pipe jacking shaft by clamping rails and moving it in a foundation pit

Abstract

The present invention discloses a method for jacking a pipe jacking well with a large section steel structure by clamping a rail and moving it in a foundation pit, and belongs to the technical field of pipe jacking wells for water supply and drainage projects. The method for jacking a pipe jacking well with a large section steel structure by clamping a rail and moving it in a foundation pit realizes the smooth jacking and dismantling recovery of the upper steel structure through the combined use of a reserved hole, a rail-clamping jacking beam, a rail-clamping climbing cone, a hydraulic jack and an articulated device. The method effectively solves the limitations of traditional jacking methods in pipe jacking wells with large sections, avoids the problem that traditional lifting equipment is difficult to lift large-section steel structures, and at the same time ensures the stability of the foundation pit retaining wall through the alternating operation of jacking and backfilling, thereby improving the safety and efficiency of construction. After the construction is completed, the upper steel structure and related structures of the jacking can be recycled and reused, thereby reducing the project cost.

Description

Technical Field

[0001] The invention relates to the technical field of pipe jacking shafts for water supply and drainage engineering, and in particular to a method for jacking a pipe jacking shaft with a large cross-section steel structure by clamping rails and moving it in a foundation pit. Background Art

[0002] The pipe jacking construction process is to use the machinery set in the pipe jacking well with the help of the jacking device to push the pipeline underground section by section, and finally receive it through the pipe jacking well to complete the pipeline laying. The pipe jacking well is divided into a pipe jacking working well and a pipe jacking receiving well, which are used as the underground space structures required for the starting and arrival of the pipe jacking operation respectively. Generally, a reinforced concrete caisson structure is adopted. The pipe jacking well is abandoned after use, so it is also a temporary structure.

[0003] Conventional water supply and drainage jacking pipe shafts are reinforced concrete structures. The jacking pipe shafts are directly abandoned after use, and the investment in reinforced concrete materials increases the project cost. Summary of the invention

[0004] The purpose of the present invention is to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a method for clamping rails and moving the jacking of a large-section steel structure jacking shaft in a foundation pit, which can recycle and reuse the upper steel structure of the jacking shaft, thereby reducing construction costs.

[0005] According to an embodiment of the present invention, a method for lifting a large-section steel structure pipe jacking shaft by clamping rails and moving in a foundation pit comprises:

[0006] Step 1: Set a reserved hole on the top of the reinforced concrete structure at the bottom of the jacking shaft, and the reserved hole is used to install the rail clamping jacking beam;

[0007] Step 2: Backfill the foundation pit of the lower reinforced concrete structure. When backfilling to the junction of the reinforced concrete structure and the upper steel structure, remove the bolts at the junction of the lower reinforced concrete and the upper steel structure;

[0008] Step 3: vertically install the rail clamping lifting beam in the reserved hole, install the rail clamping climbing cone on the rail clamping lifting beam, install the hydraulic jack on the rail clamping climbing cone, and connect the hydraulic jack to the supporting steel structure bracket of the lowest section of the upper steel structure through a hinged device;

[0009] Step 4: Start the hydraulic jack, use the rail clamp climbing cone and the rail clamp lifting beam as the force points, lift the upper steel structure, backfill the foundation pit after lifting, and as the upper steel structure is lifted upward, the rail clamp climbing cone and the hydraulic jack move upward along the rail clamp lifting beam;

[0010] Step 5: After lifting the upper steel structure, dismantle and recycle the upper steel structure section by section on the ground. After the upper steel structure is dismantled, pull out the rail-clamping lifting beam.

[0011] The method for jacking a large-section steel structure pipe jacking shaft by clamping a rail and moving it in a foundation pit according to an embodiment of the present invention has at least the following beneficial effects: through the combined use of reserved holes, rail-clamping lifting beams, rail-clamping climbing cones, hydraulic jacks and articulated devices, the smooth jacking and dismantling and recovery of the upper steel structure is achieved. This method effectively solves the limitations of traditional jacking methods in large-section pipe jacking shafts, avoids the problem that traditional lifting equipment is difficult to lift large-section steel structures, and at the same time ensures the stability of the foundation pit retaining wall through alternating operations of jacking and backfilling, thereby improving the safety and efficiency of construction. After the construction is completed, the upper steel structure and related structures of the jacking can be recycled and reused, reducing engineering costs.

[0012] According to some embodiments of the present invention, in step 2, the backfill material is plain soil or gravel.

[0013] According to some embodiments of the present invention, in step 3, the rail clamping lifting beam is made of I-beam or H-beam.

[0014] According to some embodiments of the present invention, in step 3, a plurality of safety pin holes are arranged in the up and down directions on the rail clamping lifting beam, and safety pins are detachably inserted into the safety pin holes, and the rail clamping climbing cone is connected to the rail clamping lifting beam via the safety pins.

[0015] According to some embodiments of the present invention, in step 4, jacking up the upper steel structure, backfilling the foundation pit and clamping the track climbing cone are performed cyclically.

[0016] According to some embodiments of the present invention, the maximum height of each lifting of the upper steel structure is 30 cm.

[0017] According to some embodiments of the present invention, the backfill thickness is controlled within 30 cm each time.

[0018] According to some embodiments of the present invention, a plurality of groups of rail clamping lifting beams are provided, and the plurality of groups of rail clamping lifting beams are evenly distributed along the circumference of the pipe jacking shaft.

[0019] According to some embodiments of the present invention, the hydraulic jacks connected to each rail clamping lifting beam are uniformly controlled by the system to ensure that the upper steel structure is lifted while maintaining a horizontal level.

[0020] According to some embodiments of the present invention, the steel structure corbels are welded to the circumferential side of the lowest section of the upper steel structure corresponding to the rail clamping jacking beam.

[0021] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention is further described below in conjunction with the accompanying drawings and embodiments:

[0023] Figure 1It is a structural schematic diagram of a method for clamping and moving a large-section steel structure pipe jacking shaft in a foundation pit according to an embodiment of the present invention;

[0024] Figure 2 yes Figure 1 A top view of

[0025] Figure 3 yes Figure 1 A partial enlarged view of point A in the middle.

[0026] Reference numerals:

[0027] Drainage pipe 11; inspection well 12; lower reinforced concrete structure 13; ground 14; foundation pit 15;

[0028] Upper steel structure 21; steel-concrete connecting bolts 22; steel structure connecting bolts 23;

[0029] Rail clamping jacking beam 31; rail clamping climbing cone 32; hydraulic jack 33; hinge device 34; reserved hole 35; safety pin hole 36; steel structure corbel 37. DETAILED DESCRIPTION

[0030] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0031] In the description of the present invention, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood as not including the number itself, and "above", "below", "within" etc. are understood as including the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0032] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0033] refer to Figures 1 to 3 The following describes a method for jacking a large-section steel structure pipe jacking shaft by clamping rails and moving it in a foundation pit 15 according to an embodiment of the present invention.

[0034] like Figures 1 to 3 As shown, according to an embodiment of the present invention, the method for clamping and moving the large-section steel structure jacking shaft in the foundation pit 15 comprises:

[0035] Step 1: a reserved hole 35 is provided at the top of the reinforced concrete structure 13 at the bottom of the jacking shaft, and the reserved hole 35 is used to install the rail clamping jacking beam 31;

[0036] Step 2: backfill the foundation pit 15 of the lower reinforced concrete structure 13, and when backfilling to the junction of the reinforced concrete structure and the upper steel structure 21, remove the steel structure connecting bolts 23 at the junction of the lower reinforced concrete and the upper steel structure 21;

[0037] Step 3: vertically install the rail clamping lifting beam 31 in the reserved hole 35, install the rail clamping climbing cone 32 on the rail clamping lifting beam 31, install the hydraulic jack 33 on the rail clamping climbing cone 32, and connect the hydraulic jack 33 to the matching steel structure bracket 37 of the lowest section of the upper steel structure 21 through the hinge device 34;

[0038] Step 4: Start the hydraulic jack 33, use the rail clamp climbing cone 32 and the rail clamp lifting beam 31 as the force points, lift the upper steel structure 21, and backfill the foundation pit 15 after lifting. As the upper steel structure 21 is lifted upward, the rail clamp climbing cone 32 and the hydraulic jack 33 move upward along the rail clamp lifting beam 31;

[0039] Step 5: After the upper steel structure 21 is lifted, the upper steel structure 21 is dismantled section by section on the ground 14 to be recovered. After the upper steel structure 21 is dismantled, the rail clamping lifting beam 31 is pulled out.

[0040] like Figure 1 As shown, after the construction of the water supply and drainage pipeline 11 and the process inspection well 12 is completed, the combined jacking well deep foundation pit 15 will be backfilled, wherein the lower reinforced concrete structure 13 is discarded and the upper steel structure 21 is recycled. Through the combined use of the reserved hole 35, the rail clamping jacking beam 31, the rail clamping climbing cone 32, the hydraulic jack 33 and the articulated device 34, the upper steel structure 21 is smoothly lifted and dismantled and recycled. This method effectively solves the limitations of traditional jacking methods in large-section jacking wells, avoids the problem that traditional lifting equipment is difficult to lift large-section steel structures, and at the same time, through the alternating operation of jacking and backfilling, the stability of the foundation pit 15 retaining wall is ensured, and the safety and efficiency of construction are improved.

[0041] In some specific embodiments of the present invention, in step 2, the backfill material is plain soil or gravel. These two materials have good compactness and stability, can effectively support the retaining wall of the foundation pit 15, reduce the lateral pressure on the retaining wall of the foundation pit 15 during the backfilling process, and facilitate construction operations and material acquisition, thereby reducing construction costs.

[0042] In some specific embodiments of the present invention, in step 3, the rail clamping lifting beam 31 is made of I-beam or H-beam. These two types of steel have high strength, good load-bearing capacity and bending resistance, and can effectively withstand the vertical load and lateral force generated during the lifting process. At the same time, their cross-sectional shape is easy to process and install, which improves construction efficiency and structural stability.

[0043] In some specific embodiments of the present invention, in step 3, a plurality of safety latch holes 36 are provided in the rail clamping lifting beam 31 along the up-down direction, and a safety latch is detachably inserted in the safety latch hole 36, and the rail clamping climbing cone 32 is connected to the rail clamping lifting beam 31 through the safety latch. The safety latch hole 36 is provided on the rail clamping lifting beam 31, and the rail clamping climbing cone 32 is connected through the safety latch, which can effectively prevent the rail clamping climbing cone 32 from slipping or loosening during the lifting process, thereby ensuring the safety and reliability of the lifting process. This design provides additional safety protection for the lifting operation and avoids safety accidents caused by equipment failure or operating errors.

[0044] In some specific embodiments of the present invention, in step 4, the upper steel structure 21 is lifted, the foundation pit 15 is backfilled, and the track clamping climbing cone 32 is cyclically performed. The maximum height of the upper steel structure 21 is 30 cm each time. The backfill thickness is controlled within 30 cm each time. Through the cyclic operation of lifting, backfilling, and the track clamping climbing cone 32, the jacking and the backfilling of the foundation pit 15 are synchronized, ensuring the pressure balance between the retaining wall of the foundation pit 15 and the backfill soil, avoiding deformation or collapse of the retaining wall of the foundation pit 15 caused by untimely backfilling, and improving the safety and stability of the construction process. The maximum height of each jacking is limited to 30 cm, which can effectively control the stress changes and deformations during the jacking process, and avoid structural instability or damage caused by over-high jacking. At the same time, a smaller jacking height is convenient for construction operation and monitoring, ensuring the stability and safety of the jacking process. Controlling the backfill thickness within 30 cm each time can ensure the density and stability of the backfill material, reduce the lateral pressure on the retaining wall of the foundation pit 15 during the backfill process, avoid deformation or collapse of the retaining wall of the foundation pit 15 due to excessive backfill, and further ensure the safety and stability of the construction process.

[0045] like Figures 1 to 3As shown, multiple groups of rail clamping lifting beams 31 are arranged, and multiple groups of rail clamping lifting beams 31 are evenly distributed along the circumference of the jacking shaft. The hydraulic jacks 33 connected to each rail clamping lifting beam 31 are uniformly controlled by the system to ensure that the upper steel structure 21 is lifted horizontally. The steel structure bracket 37 is welded to the circumference of the lowest section of the upper steel structure 21 corresponding to the rail clamping lifting beam 31. The rail clamping lifting beams 31 are evenly arranged along the circumference of the jacking shaft, which can make the lifting force evenly distributed and avoid structural deformation or damage caused by excessive local force. This design improves the stability and reliability of the jacking process and ensures that the upper steel structure 21 remains horizontal and stable during the jacking process. By uniformly controlling the hydraulic jacks 33 on each rail clamping lifting beam 31 by the system, it can be ensured that the upper steel structure 21 always remains on the same horizontal plane during the jacking process, avoiding structural deformation or damage caused by local jacking too high or too low. This design further improves the accuracy and safety of the jacking process and reduces construction risks. The steel structure bracket 37 is welded to the lowermost section of the upper steel structure 21 corresponding to the rail clamping lifting beam 31, which can provide a stable support point for the lifting operation, ensure uniform force during the lifting process, and avoid structural deformation or damage caused by local force concentration. At the same time, this design enhances the overall stability of the steel structure and improves the safety and reliability of construction.

[0046] The upper steel structure 21 is assembled in multiple sections, and each section of the steel structure is connected by steel-concrete connecting bolts 22. After the pipe jacking well construction is completed, the steel structure can be slowly lifted up, dismantled and recycled section by section on the ground 14, and then reused.

[0047] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. A method for lifting a large-section steel structure pipe jacking pit by clamping rails and moving it in a foundation pit, characterized in that: include: Step 1: Set a reserved hole on the top of the reinforced concrete structure at the bottom of the jacking shaft, and the reserved hole is used to install the rail clamping jacking beam; Step 2: Backfill the foundation pit of the lower reinforced concrete structure. When backfilling to the junction of the reinforced concrete structure and the upper steel structure, remove the bolts at the junction of the lower reinforced concrete and the upper steel structure; Step 3: vertically install the rail clamping lifting beam in the reserved hole, install the rail clamping climbing cone on the rail clamping lifting beam, install the hydraulic jack on the rail clamping climbing cone, and connect the hydraulic jack to the supporting steel structure bracket of the lowest section of the upper steel structure through a hinged device; Step 4: Start the hydraulic jack, use the rail clamp climbing cone and the rail clamp lifting beam as the force points, lift the upper steel structure, backfill the foundation pit after lifting, and as the upper steel structure is lifted upward, the rail clamp climbing cone and the hydraulic jack move upward along the rail clamp lifting beam; Step 5: After lifting the upper steel structure, dismantle and recycle the upper steel structure section by section on the ground. After the upper steel structure is dismantled, pull out the rail-clamping lifting beam.

2. The method for lifting a large-section steel structure pipe jacking shaft by clamping rails and moving it in a foundation pit according to claim 1, characterized in that: In step 2, the backfill material is plain soil or gravel.

3. The method for lifting a large-section steel structure jacking shaft by clamping rails and moving it in a foundation pit according to claim 1, characterized in that: In step 3, the rail clamping lifting beam adopts I-beam or H-beam.

4. The method for lifting a large-section steel structure pipe jacking shaft by clamping rails and moving it in a foundation pit according to claim 1, characterized in that: In step 3, a plurality of safety latch holes are provided on the rail clamping lifting beam along the up-down direction, and safety latches are detachably inserted into the safety latch holes, and the rail clamping climbing cone is connected to the rail clamping lifting beam via the safety latches.

5. The method for lifting a large-section steel structure pipe jacking shaft by clamping rails and moving it in a foundation pit according to claim 1, characterized in that: In step 4, the jacking of the upper steel structure, backfilling of the foundation pit and clamping of the track climbing cone are carried out in a cycle.

6. The method for jacking a large-section steel structure pipe jacking shaft by clamping rails and moving it in a foundation pit according to claim 5, characterized in that: The maximum height of each lifting of the upper steel structure is 30cm.

7. The method for lifting a large-section steel structure pipe jacking shaft by clamping rails and moving it in a foundation pit according to claim 6, characterized in that: The backfill thickness should be controlled within 30cm each time.

8. The method for lifting a large-section steel structure pipe jacking shaft by clamping rails and moving it in a foundation pit according to claim 1, characterized in that: There are multiple groups of rail clamping lifting beams, and the multiple groups of rail clamping lifting beams are evenly distributed along the periphery of the jacking shaft.

9. The method for jacking a large-section steel structure pipe jacking shaft by clamping rails and moving it in a foundation pit according to claim 8, characterized in that: The hydraulic jacks connected to each rail-clamping lifting beam are uniformly controlled by the system to ensure that the upper steel structure is lifted horizontally.

10. The method for jacking a large-section steel structure pipe jacking shaft by clamping rails and moving it in a foundation pit according to claim 9, characterized in that: The steel structure corbel corresponding to the rail clamping jacking beam is welded on the side of the lowest section of the upper steel structure.

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