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A construction method for shallow burial and underground excavation of power tunnels in pebble ground

A technology for power tunnels and shallow buried underground excavation, which is applied to tunnels, tunnel linings, earthwork drilling and mining, etc. It can solve the problems of long tunnel lining construction period and unsuitable for deformation control requirements in areas with pebble layers, so as to improve installation efficiency and reduce The effect of preventing small cracks and preventing deformation

Active Publication Date: 2022-02-18
CHINA MCC5 GROUP CORP
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Problems solved by technology

[0007] In order to solve the deformation control requirements of the existing tunnel lining which has a long construction period and is not suitable for the pebble layer area, the present invention provides a shallow buried and underground excavation construction method for the pebble layer power tunnel

Method used

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  • A construction method for shallow burial and underground excavation of power tunnels in pebble ground
  • A construction method for shallow burial and underground excavation of power tunnels in pebble ground
  • A construction method for shallow burial and underground excavation of power tunnels in pebble ground

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Embodiment Construction

[0031] The present invention will be further described below in conjunction with the embodiments, and the described embodiments are only a part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, other used embodiments obtained by persons of ordinary skill in the art without creative efforts all belong to the protection scope of the present invention.

[0032] In conjunction with the accompanying drawings, a construction method for shallow burial and underground excavation of a power tunnel in a pebble layer according to the present invention includes a dewatering well construction process and a power tunnel construction process, and the dewatering well construction process should reduce the groundwater level in the pebble layer area to 0.5 below m;

[0033] Described dewatering well construction procedure comprises the step of calculating the wellhead number of dewatering wells and the construction step of dewaterin...

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Abstract

The invention belongs to the technical field of electric power tunnel construction, and discloses a construction method for shallow burial and underground excavation of electric power tunnels in pebble strata, in order to solve the deformation control requirements of the existing tunnel lining which has a long construction period and is not suitable for pebble layer areas. In the present invention, the upper support structure and the lower support structure are fastened together to form an initial support structure, and then waterproofing and secondary lining are done. On the one hand, it can quickly support and protect the arched roof, which solves the problem of the existing initial support structure. The problem of long construction period is especially suitable for use in areas where geological deformation is prone to occur, such as pebble formations; on the other hand, the present invention effectively integrates steel support and engineering plastic support, and the fastening connection part adopts the method of bolt fastening , can not only ensure the strength of the connection, but also improve the efficiency of installation, further shorten the initial support time, effectively prevent the deformation of the pebble formation, and ensure the safety of construction and the stability of the formation.

Description

technical field [0001] The invention belongs to the technical field of electric power tunnel construction, and in particular relates to a construction method for shallow burial and underground excavation of electric power tunnels in pebble strata. Background technique [0002] The application of power tunnels in developed countries abroad has been very extensive, and it has also been greatly promoted in developed areas such as my country's coastal areas, but it is not widely used in undeveloped areas such as the west of my country. [0003] With the transformation of my country's economic growth mode, the standards of urban planning are getting higher and higher, and the forward-looking is becoming more and more prominent. There will be more and more construction of comprehensive utility corridors and power tunnels. The old urban area is more suitable for the construction of power tunnels because the surrounding buildings and municipal facilities have been completed and do n...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21D9/00E21D11/10E21D11/15E21D11/38E21D11/18E21D20/00E21D11/00E21D11/14
CPCE21D9/001E21D9/00E21D11/10E21D11/105E21D11/152E21D11/383E21D11/18E21D11/183E21D20/00E21D11/00E21D11/14
Inventor 李飞
Owner CHINA MCC5 GROUP CORP
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