Large-span subway foundation pit pipeline protection device

Abstract

The utility model discloses a large span subway foundation pit pipeline protection device relates to foundation pit pipeline protection technical field. Including steel sleeve or steel sleeve box, the steel sleeve includes semicircular sleeve, and the semicircular sleeve interlock and form steel sleeve section, and the steel sleeve section is connected and forms steel sleeve, and the steel sleeve box includes U type steel plate groove and steel cover, and the steel cover is connected in the top of U type steel plate groove, and the steel cover and U type steel plate groove form steel sleeve box section, and the steel sleeve box section is connected and forms steel sleeve box, still include lifting ring, and the lifting ring is connected on the crown beam, and the lifting ring on two adjacent crown beams is connected through longitudinal stress wire rope, and longitudinal stress wire rope is connected with steel sleeve or steel sleeve box through transverse stress wire rope. The utility model discloses a steel sleeve or steel sleeve box, in the foundation pit enclosure structure crown beam support construction, will pipeline original envelope artificial break, adopts steel sleeve or steel sleeve box and will pipeline in it, and the upper is hung through steel wire rope, realizes safe, reliable pipeline in -situ protection.

Description

Technical Field

[0001] This utility model relates to the field of foundation pit pipeline protection technology, specifically to a large-span subway foundation pit pipeline protection device. Background Technology

[0002] Before subway construction, pipeline relocation is difficult due to the fact that subway construction is currently located in bustling urban areas with complex pipeline layouts. The relocation of various types of pipelines is challenging and the construction period is long.

[0003] Therefore, it is necessary to provide a large-span subway foundation pit pipeline protection device that can provide in-situ protection for foundation pit pipelines. Utility Model Content

[0004] The main purpose of this utility model is to provide a protection device for pipelines in large-span subway foundation pits to solve the problems existing in the prior art.

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

[0006] A protection device for pipelines in a large-span subway foundation pit, comprising a steel sleeve or a steel casing.

[0007] The steel sleeve includes a semi-circular sleeve, two semi-circular sleeves are fastened together to form a steel sleeve segment, and several steel sleeve segments are connected to form the steel sleeve.

[0008] The steel sleeve box includes a U-shaped steel plate groove and a steel cover plate. The steel cover plate is connected to the top of the U-shaped steel plate groove. The steel cover plate and the U-shaped steel plate groove form a steel sleeve box segment. Several steel sleeve box segments are connected to form the steel sleeve box.

[0009] It also includes lifting rings, which are connected to the crown beam. The lifting rings on two adjacent crown beams are connected by longitudinally stressed steel wire ropes, which are connected to steel sleeves or steel casings by transversely stressed steel wire ropes.

[0010] Furthermore, the upper and lower side walls of the semi-circular sleeve are symmetrically provided with connecting pieces, which are equally spaced on the same horizontal line, and bolt holes are provided on the connecting pieces.

[0011] Furthermore, the two semi-circular sleeves are interlocked to form a steel sleeve segment, with the misalignment distance equal to the spacing between horizontally adjacent connecting pieces.

[0012] Furthermore, the spacing between horizontally adjacent connecting pieces is 1.5m.

[0013] Furthermore, the semi-circular sleeve has a length of 6m, a thickness of 3mm, and a diameter of 300mm.

[0014] Furthermore, connecting plates are symmetrically arranged on the two side walls adjacent to the opening of the U-shaped steel plate channel, with a spacing of 1m between adjacent connecting plates, and bolt holes are provided on the connecting plates.

[0015] Furthermore, the U-shaped steel plate channel and the steel cover plate are provided with matching bolt connection holes, and the U-shaped steel plate channel and the steel cover plate are fixedly connected by bolts.

[0016] Furthermore, two adjacent U-shaped steel plate channels are fixedly connected by a connecting steel plate. The connecting steel plate is provided with bolt through holes, and the U-shaped steel plate channel is provided with side holes that are adapted to the bolt through holes. The U-shaped steel plate channel and the connecting steel plate are fixedly connected by bolts.

[0017] Furthermore, the bolt through holes at both ends of the connecting steel plate are symmetrically arranged, with three bolt through holes evenly arranged at each end.

[0018] Furthermore, the U-shaped steel plate channel is 3m long and 3mm thick.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] It takes up little space and is easy to install and dismantle.

[0021] During the construction of the cap beam support for the foundation pit retaining structure, the original encapsulation of the pipeline is manually removed using steel casings or steel sleeves. The pipeline is then placed inside the steel casings or steel sleeves and suspended from above by steel wire ropes, achieving safe and reliable in-situ protection of the pipeline. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the steel sleeve being fixed on the supporting beam of the enclosure structure in this utility model.

[0023] Figure 2 This is a schematic diagram of the cross-section of the steel sleeve in this utility model.

[0024] Figure 3 This is a schematic diagram of the steel sleeve segment in this utility model.

[0025] Figure 4 This is a cross-sectional schematic diagram of the steel sleeve box in this utility model.

[0026] Figure 5 This is a side view of the steel sleeve box in this utility model.

[0027] Figure 6 This is a schematic diagram of the steel sleeve box being fixed on the supporting beam of the enclosure structure in this utility model.

[0028] Figure 7 This is a schematic diagram of the steel sleeve box being fixed on the crown beam in this utility model.

[0029] Among them, 10-steel sleeve; 11-steel sleeve segment; 20-steel casing; 21-steel casing segment; 22-U-shaped steel plate channel; 23-steel cover plate; 24-connecting steel plate; 30-lifting ring; 40-longitudinal load-bearing steel wire rope; 50-transverse load-bearing steel wire rope; 60-pipeline; 70-enclosure structure support beam; 80-crown beam. Detailed Implementation

[0030] The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments.

[0031] Example 1

[0032] Combination Figures 1-4 This embodiment provides a protection device for pipelines in a large-span subway foundation pit, including a steel sleeve 10. The steel sleeve 10 includes a semi-circular sleeve, and two semi-circular sleeves are interlocked and fixed to form a steel sleeve segment 11. Several steel sleeve segments 11 are connected to form the steel sleeve 10.

[0033] It also includes lifting rings 30, which are connected to the cap beam 80 or the retaining structure support beam 70 by pre-embedding and fixing. The lifting rings on two adjacent cap beams 80 are connected by longitudinal tension steel wire ropes 40, and the longitudinal tension steel wire ropes 40 are connected to the steel sleeve 10 by transverse tension steel wire ropes 50. In this embodiment, the lifting rings 30 are made of HPBФ32 round steel, the diameter of the longitudinal tension steel wire ropes 40 is 22mm, and the diameter of the transverse tension steel wire ropes 50 is 16mm.

[0034] The upper and lower side walls of the semi-circular sleeve are symmetrically provided with connecting pieces, which are located on the same horizontal line and are equally spaced. The connecting pieces are provided with bolt holes, and the two semi-circular sleeves that are fastened together are connected by Ф16mm bolts.

[0035] The two semi-circular sleeves are staggered and interlocked to form a steel sleeve segment 11, with the stagger distance equal to the spacing between horizontally adjacent connecting pieces; preferably, the spacing between horizontally adjacent connecting pieces is 1.5m.

[0036] The semi-circular sleeve is 6m long, 3mm thick, and 300mm in diameter.

[0037] The application of this device shortens the pre-construction preparation time, improves the construction progress, and allows for the rational arrangement of the foundation pit construction sequence during implementation. It also maximizes the reuse rate of steel casing foundations and steel casing boxes, coordinates work, and ensures the safety of pipelines during construction.

[0038] On-site construction includes the following steps:

[0039] (1) Retaining pile construction stage

[0040] During the construction of the retaining structure pile foundation, the location of the pipeline 60 is manually explored and the pile foundation positioning is finely adjusted. Steel casings are used to protect the pile foundation on both sides of the pipeline 60 so that the pipeline passes through the pile.

[0041] (2) Construction stage of capping beam and retaining structure support beam

[0042] Before construction of the crown beam 80 and the retaining structure support beam 70, manual excavation was carried out to the bottom of the pipeline, so that the entire pipeline was fully exposed in the foundation pit. The pipeline encapsulation was then manually removed, and the prepared steel sleeve was inserted into the pipeline to replace the original encapsulation, wrapping the pipeline inside and making it a whole with bolts.

[0043] Pour 80mm of concrete for the crown beam or 70mm for the retaining structure support beam, and pre-embed 30mm lifting rings. After the concrete reaches the design strength, suspend the longitudinal and transverse load-bearing steel wire ropes. Each joint of the steel wire rope is fixed with 4 clips, and each steel wire rope is tightened.

[0044] (3) Earthwork excavation and main structure construction stage

[0045] During earthwork excavation and main construction, warning signs were posted on the suspended pipelines 60, and a dedicated person was assigned to monitor the process.

[0046] (4) Pipeline restoration after main construction is completed

[0047] Once the main structure construction is completed and the top slab is backfilled to the bottom elevation of pipeline 60, the protective steel sleeve is manually removed, moved to other locations requiring pipeline 60 protection, and the original encapsulation of pipeline 60 is restored. The backfill is then completed to the original ground elevation, thus completing the pipeline 60 protection construction.

[0048] In this embodiment, during the construction of the cap beam support for the foundation pit retaining structure, the original encapsulation of the pipeline is manually removed, and the pipeline is placed inside the steel sleeve. The pipeline is then suspended from above by steel wire rope, achieving safe and reliable in-situ protection of the pipeline.

[0049] Example 2

[0050] This embodiment provides a protection device for pipelines in a large-span subway foundation pit, including a steel casing 20. The steel casing includes a U-shaped steel plate groove 22 and a steel cover plate 23. The steel cover plate 23 is connected to the top of the U-shaped steel plate groove 22. The steel cover plate 23 and the U-shaped steel plate groove 22 form a steel casing segment 21. Several steel casing segments 21 are connected to form the steel casing 20.

[0051] In this embodiment, the U-shaped steel plate channel 22 is formed by welding steel plates, with a length of 3m and a thickness of 3mm.

[0052] It also includes lifting rings 30, which are connected to the cap beam 80 or the retaining structure support beam 70. The lifting rings 30 on two adjacent cap beams 80 are connected by longitudinally stressed steel wire ropes 40, and the longitudinally stressed steel wire ropes 40 are connected to the steel casing 20 by transversely stressed steel wire ropes 50.

[0053] The U-shaped steel plate groove 22 has symmetrical connecting plates on its two side walls adjacent to its opening. The distance between adjacent connecting plates is 1m, and bolt holes are provided on the connecting plates.

[0054] The U-shaped steel plate groove 22 and the steel cover plate 23 are provided with matching bolt connection holes, and the U-shaped steel plate groove 22 and the steel cover plate 23 are fixedly connected by bolts.

[0055] Two adjacent U-shaped steel plate channels 22 are fixedly connected by connecting steel plates 24. The connecting steel plates 24 are provided with bolt through holes, and the U-shaped steel plate channels 22 are provided with side holes that are adapted to the bolt through holes. The U-shaped steel plate channels 22 and the connecting steel plates 24 are fixedly connected by Ф16mm bolts.

[0056] The bolt through holes at both ends of the connecting steel plate 24 are symmetrically arranged, with three bolt through holes evenly arranged at each end.

[0057] In this embodiment, the original encapsulation of the pipeline is manually removed during the construction of the cap beam support of the foundation pit retaining structure using the steel sleeve 20. The pipeline 60 is placed inside the steel sleeve 20 and suspended from above by steel wire rope, thus achieving safe and reliable in-situ protection of the pipeline 60.

[0058] The above description is merely a preferred embodiment of the present utility model and does not constitute any limitation on the technical scope of the present utility model. Therefore, any minor modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. A protection device for pipelines in a large-span subway foundation pit, characterized in that, Including steel sleeves or steel casings; The steel sleeve includes a semi-circular sleeve, two semi-circular sleeves are fastened together to form a steel sleeve segment, and several steel sleeve segments are connected to form the steel sleeve. The steel sleeve box includes a U-shaped steel plate groove and a steel cover plate. The steel cover plate is connected to the top of the U-shaped steel plate groove. The steel cover plate and the U-shaped steel plate groove form a steel sleeve box segment. Several steel sleeve box segments are connected to form the steel sleeve box. It also includes lifting rings, which are connected to the crown beam. The lifting rings on two adjacent crown beams are connected by longitudinally stressed steel wire ropes, which are connected to steel sleeves or steel casings by transversely stressed steel wire ropes.

2. The protection device for pipelines in a large-span subway foundation pit as described in claim 1, characterized in that, The upper and lower side walls of the semi-circular sleeve are symmetrically provided with connecting pieces, which are evenly spaced on the same horizontal line, and bolt holes are provided on the connecting pieces.

3. The protection device for pipelines in a large-span subway foundation pit as described in claim 2, characterized in that, The two semi-circular sleeves are staggered and interlocked to form a steel sleeve segment, and the staggered distance is equal to the spacing between horizontally adjacent connecting pieces.

4. The protection device for pipelines in a large-span subway foundation pit as described in claim 2, characterized in that, The spacing between horizontally adjacent connecting pieces is 1.5m.

5. A protection device for pipelines in a large-span subway foundation pit as described in claim 1, characterized in that, The semi-circular sleeve is 6m long, 3mm thick, and 300mm in diameter.

6. A protection device for pipelines in a large-span subway foundation pit as described in claim 1, characterized in that, The U-shaped steel plate channel is symmetrically provided with connecting plates on the two side walls adjacent to its opening, with a spacing of 1m between adjacent connecting plates, and bolt holes are provided on the connecting plates.

7. A pipeline protection device for large-span subway foundation pits as described in claim 1, characterized in that, The U-shaped steel plate channel and the steel cover plate are provided with matching bolt connection holes, and the U-shaped steel plate channel and the steel cover plate are fixedly connected by bolts.

8. A protection device for pipelines in a large-span subway foundation pit as described in claim 1, characterized in that, Two adjacent U-shaped steel plate channels are fixedly connected by a connecting steel plate. The connecting steel plate is provided with bolt through holes, and the U-shaped steel plate channel is provided with side holes that are adapted to the bolt through holes. The U-shaped steel plate channel and the connecting steel plate are fixedly connected by bolts.

9. A protection device for pipelines in a large-span subway foundation pit as described in claim 1, characterized in that, The bolt holes at both ends of the connecting steel plate are symmetrically arranged, with three bolt holes evenly arranged at each end.

10. A protection device for pipelines in a large-span subway foundation pit as described in claim 1, characterized in that, The U-shaped steel plate channel is 3m long and 3mm thick.

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