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Small-clear-distance overlapped tunnel construction method

A technology of tunnel construction, construction method, applied in the direction of tunnel, tunnel lining, earthwork drilling and mining etc.

Active Publication Date: 2020-09-11
高军
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There is no research on the possible adverse effects in the long-term use of the tunnel after its completion

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Embodiment Construction

[0030] Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be clear that the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0031] An embodiment of the present invention provides a construction method for an overlapping tunnel with a small clear distance. The overlapping tunnel with a small clear distance refers to an upper and lower overlapping tunnel with a net distance of 2-5m between the vault of the lower tunnel and the invert of the upper tunnel. figure 1 It is a schematic flow chart of the construction method of small clear distance overlapping tunnels according to an embodiment of the present invention, see figure 1 , the embodiment of the...

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Abstract

The embodiment of the invention discloses a small-clear-distance overlapped tunnel construction method, and relates to the technical field of tunnel construction. The small-clear-distance overlapped tunnel construction method comprises the following steps of vertically driving a first section of profile steel upwards into arch surrounding rock of a lower-layer tunnel, after the first section of profile steel is driven into the arch surrounding rock of the lower-layer tunnel, continuing the first section of profile steel, vertically driving a second section of profile steel upwards into the surrounding rock of the arch surrounding rock of the lower-layer tunnel; constructing a lower-layer tunnel primary support, and welding and connecting the bottom end of the second section of profile steel with a lower-layer arch profile steel frame; excavating an upper-layer tunnel, constructing an upper-layer tunnel primary support, reserving a gap between the bottom end of the first section of profile steel and the top end of the second section of profile steel, and welding an inverted arch steel frame of the upper-layer tunnel with the top end of the first section of profile steel together. The method is suitable for excavation construction of the upper-layer and lower-layer overlapped tunnels.

Description

technical field [0001] The invention relates to the technical field of tunnel construction, in particular to a construction method for overlapping tunnels with a small clear distance. Background technique [0002] Restricted by engineering conditions, upper and lower overlapping railway projects appear more and more frequently in traffic construction. At present, a lot of research work has been carried out on the upper and lower overlapping tunnels at home and abroad, and the research directions mainly focus on the small clear distance overlapping tunnels, the analysis of construction mechanical behavior, construction control technology and construction sequence, etc. There is no research on possible adverse effects in the long-term use of tunnels after they are built. Contents of the invention [0003] In view of this, the embodiment of the present invention provides a construction method for overlapping tunnels with a small clear distance, which prevents or reduces the ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D11/18E21D11/15E21D20/00E21D9/14
CPCE21D11/18E21D11/152E21D20/00E21D9/14
Inventor 林晓高军黎建华王斌王岭蔡荣喜杨立云谭发刚吴德兴项小珍王东旭
Owner 高军
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