Ultra-shallow-buried tunnel structure and construction method

Abstract

The invention relates to the field of tunnel construction and discloses an ultra-shallow-buried tunnel structure and a construction method. The ultra-shallow-buried tunnel structure is as follows: a double-layer pipe shed structure is arranged on the top of the tunnel; a first layer of preliminary bracing structure and a second layer of preliminary bracing structure are successively arranged in the tunnel; the first layer of preliminary bracing structure and the second layer of preliminary bracing structure are respectively arranged in the form of one circle along the circumferential directionof the tunnel; an inverted arch secondary lining structure is arranged above the second layer of preliminary bracing structure on the position of inverted arch; an arch wall secondary lining structure is arranged on the inner side of the second layer of preliminary bracing structure on the position of arch wall; a road structure is arranged above the arch wall secondary lining structure. According to the ultra-shallow-buried tunnel structure and the construction method provided by the invention, the double-layer pipe shed structure is arranged on the top of the tunnel and two layers of preliminary bracing structures are arranged on the inner side wall and inverted arch of the tunnel, so that bracing rigidity is high, firmness and stability of ultra-shallow-buried tunnel can be promoted, and safety of ultra-shallow-buried tunnel and safety and comfort level of vehicles above the ultra-shallow-buried tunnel can be guaranteed.

Description

technical field [0001] The invention relates to the field of tunnel construction, in particular to an ultra-shallow buried tunnel structure and a construction method. Background technique [0002] With the advancement of urban construction, the basic road network has been formed. The traffic capacity and service level of the existing roads are increasingly unable to meet the increasing traffic volume. The problem of traffic congestion is becoming more and more prominent, so it is necessary to build new urban roads in the city. Restricted by control factors such as land acquisition and demolition, existing intersection elevation, plane alignment, road longitudinal slope, and geological conditions, the horizontal and vertical alignments of new roads are often unique, and it is inevitable that they will pass through existing roads, while urban roads Most of the underpassing tunnels are shallow buried. Moreover, the city is a concentrated area of ​​people, and it is required th...

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Problems solved by technology

[0006] The purpose of the present invention is to provide an ultra-shallow buried tunnel structure and construction method, which is used to solve or partially solve the problem of poor safety in the construction stage of ultra-shallow buried tunnels and will affect the safety and comfort of driving above.

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