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Suspension protection construction method for high-voltage cable pipeline transversely penetrating through middle of large-span foundation pit

A technology of high-voltage cables and construction methods, which is applied in the direction of cable installation, cable installation in underground pipelines, and infrastructure engineering, and can solve problems such as hidden dangers in engineering construction quality, high construction safety risks, and heavy relocation workload. Prevent damage to flexible suspension facilities, improve safety and stability, and improve safety and reliability

Active Publication Date: 2022-01-25
CCFEB CIVIL ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the method disclosed in the above-mentioned prior art has the following problems: (1) the relocation workload is large, the construction period is long, the construction cost is high, land resources are wasted, vegetation is destroyed, land loss pollutes the surrounding environment, and the normal life of residents or businesses in the area is disturbed; (2) Small-span suspension is not suitable for large-span suspension construction with a width of 53m and above. It is necessary to construct vertical support columns in the middle of the foundation pit to support horizontal suspension beams, which is neither economical nor convenient. (3) The construction of cable-stayed suspension and suspension cable suspension is easy to be difficult to implement due to the space restriction of the construction site, the construction is difficult, the construction safety risk is high, the construction period is long, and the construction cost High disadvantage
[0004]At present, in China, there are very few protection constructions and prevention of electric shock and leakage for the 10kV hose-type high-voltage cables that traverse the middle of the foundation pit of the underground structure with a span of 53m or more Research

Method used

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  • Suspension protection construction method for high-voltage cable pipeline transversely penetrating through middle of large-span foundation pit
  • Suspension protection construction method for high-voltage cable pipeline transversely penetrating through middle of large-span foundation pit
  • Suspension protection construction method for high-voltage cable pipeline transversely penetrating through middle of large-span foundation pit

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Experimental program
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Embodiment 1

[0057] For the suspension protection construction method of the high-voltage cable pipeline crossing the middle part of the long-span foundation pit, please refer to Figure 1 to Figure 5 , which includes the following steps:

[0058] S1. Construction environment survey

[0059] Investigate and detect the underground laying depth, location, diameter, material, laying direction, cable well location, high-voltage switchgear location and surrounding environment of the high-voltage cable pipeline 2;

[0060] S2. Foundation pit structure construction in areas not affected by high-voltage cables and pipelines

[0061] In the section not affected by high-voltage cables and pipelines, construct enclosure piles 3, lattice support columns 4, crown beams 5 and retaining walls 6 in the foundation pit 1 of the underground structure;

[0062] S3. Elevation construction of high-voltage cable pipelines

[0063] S31. Pulling out the reserved length of high-voltage cable pipeline

[0064] A...

Embodiment 2

[0092] In the underground structure construction project of a rail transit station in Guangxi, in the middle of the foundation pit with a design depth of 10m and a width of 53m, a buried depth of 7.0m, YJV22-8.7 / 15kV-3×300mm 2 , 10kV four hose-type high-voltage cables, and each of them is respectively installed in a DN166 mm×8.0mm PE (polyethylene) cable protection tube; below, as Figure 1 to Figure 4 As shown, this embodiment shows the specific application of the method of the present invention in the above-mentioned engineering case, including the following steps:

[0093] S1. Construction environment survey

[0094] According to the construction drawing design of the underground structure of the station, investigate and detect in detail the underground laying depth, position, diameter, material, laying direction, cable well position, and high-voltage switchgear position of the high-voltage cable pipeline 2 (10kV hose type in this project) and the surrounding environment, ...

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Abstract

The invention discloses a suspension protection construction method for a high-voltage cable pipeline transversely penetrating through the middle of a large-span foundation pit. The suspension protection construction method comprises the following steps that S1, a construction environment is surveyed; S2, foundation pit structure construction of the section not affected by the high-voltage cable pipeline is achieved; S3, lifting construction of the high-voltage cable pipeline is achieved; S4, laying and suspension construction of the high-voltage cable pipeline are achieved; S5, integrity protection construction of the high-voltage cable pipeline is carried out; and S6, underground main body structure construction is achieved. According to the suspension protection construction method for the high-voltage cable pipeline transversely penetrating through the middle of the large-span foundation pit, the high-voltage cable pipeline is arranged in a root division and segmentation manner that two ends are radiated and the middle is parallel, so that the suspension weight and span of the high-voltage cable pipeline can be reduced and shortened, and the safety and reliability of flexible suspension are improved; and meanwhile, underground existing structures such as inclined supporting beams, top beams and the like are assisted, bearing steel wire ropes are arranged in a short-span and long-span alternating and multi-row parallel mode so as to carry out flexible suspension on the high-voltage cable pipeline, the suspension weight can be evenly distributed on the inclined supporting beams, and therefore the suspension safety and stability are further improved.

Description

technical field [0001] The invention relates to the technical field of underground cable protection construction, in particular to a construction method for suspension protection of a high-voltage cable pipeline crossing the middle of a large-span foundation pit. Background technique [0002] In the construction of underground structures of urban rail transit stations, four YJV22-8.7 / 15kV-3×300mm cables with an underground depth of 7.0m are often encountered 2 And each 10kV hose-type high-voltage cable in the DN166 mm×8.0mm PE (polyethylene) cable protection tube traverses the middle of the foundation pit with a width of 53m and above and a depth of 10m. The excavation of the foundation pit and the construction of the main structure bring potential safety risks. [0003] Before the construction of underground structures, the 10kV hose-type high-voltage cables must be protected. In the prior art, most methods of line relocation, Bailey beam or I-beam or triangular steel tru...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D17/02H02G9/06
CPCE02D17/02H02G9/06
Inventor 梁文新邹瑜刘世华刘文胜黄华祥赵鑫邓浩何世林冯金龙宋佳龙孙福生刘平
Owner CCFEB CIVIL ENG
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