Existing tunnel vertical deformation control structure and construction method during up-down overlapped tunnel construction

An existing tunnel and vertical deformation technology, applied in tunnels, earthwork drilling, mining equipment, etc., can solve the problems of uneven distribution of reinforcement range, limited deformation control ability, and permanent structural deformation, so as to ensure the tunnel structure and operation Safe, enhanced durability, easy-to-implement effects

CN114293994AActive Publication Date: 2022-04-08CHINA CONSTR FIFTH ENG DIV CORP LTD +1
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2022-04-08

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Abstract

The invention discloses an existing tunnel vertical deformation control structure and a construction method during up-and-down overlapping tunnel construction. The existing tunnel vertical deformation control structure is arranged in an up-and-down overlapping influence area between a newly-built tunnel to be newly built and an existing tunnel closest to the newly-built tunnel. Or is arranged in an up-and-down overlapping influence area between a newly-built tunnel to be newly built and two adjacent existing tunnels on the two sides of the newly-built tunnel, and comprises rigid partition layers which are sequentially arranged at intervals in the depth direction of the up-and-down overlapping influence area, and each rigid partition layer comprises rigid partition piles which are sequentially arranged at intervals in the horizontal direction and are formed in a pouring mode. The rigid partition piles of each rigid partition layer intersect with the existing tunnel and the newly-built tunnel in a spatial included angle mode. The vertical deformation control structure and the construction method have the advantages of being efficient and practical, vertical deformation diseases such as floating and sinking of the existing operating tunnel in the tunnel up-down overlapping area are safely and reliably prevented, and structural stress increase caused by deformation and construction period and economic loss caused by deformation treatment are avoided.
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Description

technical field

[0001] The invention relates to the technical field of geotechnical and underground engineering, in particular to a vertical deformation control structure of an existing tunnel during the construction of an upper and lower overlapping tunnel. In addition, the present invention also relates to a construction method of the existing tunnel vertical deformation control structure during the construction of the above-mentioned upper and lower overlapping tunnels. Background technique

[0002] With the construction of urban rail transit, by the end of 2020, the operating mileage of existing subways across the country will exceed 6,400 kilometers, and the mileage of subways under construction will exceed 5,000 kilometers. At the same time, a large number of municipal road tunnels are planned. Due to the limited urban shallow underground space resources, with the continuous construction of subways, it will become more and more common for new tunnels to cross over / und...

Examples

Embodiment Construction

[0029] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings, but the present invention can be implemented in various ways defined and covered below.

[0030] refer to Figure 4 , the preferred embodiment of the present invention provides an existing tunnel vertical deformation control structure during the construction of the upper and lower overlapping tunnels, which is arranged in the upper and lower overlapping influence area between the new tunnel 20 to be newly built and the closest existing tunnel 10 30, or arranged in the upper and lower overlapping influence area 30 between the new tunnel 20 to be newly built and two existing tunnels 10 close to its two sides, the vertical deformation control structure includes: along the depth of the upper and lower overlapping influence area 30 The rigid partition layers are sequentially arranged at intervals in the horizontal direction, and the rigid partition layers i...