Shallow-buried tunnel section construction method

Abstract

A shallow-buried tunnel section construction method comprises the following steps that tunnel front half section construction is carried out, wherein a supporting structure and a waterproof curtain are constructed from one side of a riverway to the center of the riverway to form a first cofferdam; tunnel center island construction is carried out, wherein a steel seal door and an inserted and hit steel plate pile are mounted at the position, on the inner side face of the riverway, of the first cofferdam, then the two sides of the position, of the inner side face of the riverway, of the first cofferdam are finished to form island heads, and a center island is formed; tunnel rear half section construction is carried out, wherein the center island and the other side of the riverway are utilized for constructing a supporting structure and a waterproof curtain to form a second cofferdam, tunnel rear half section construction is carried out after water drawing is carried out, and after construction is completed, full-line navigation opening up is restored. The shallow-buried tunnel section construction method has the advantages of being feasible in technology, economical, reasonable, simple in process, easy and convenient to operate and safe in construction and meets the development direction of the modern engineering technology, and therefore wide popularization prospects are achieved.

Description

technical field [0001] The invention relates to the technical field of building construction, in particular to a segmented construction method for a shallow buried tunnel. Background technique [0002] At present, the main methods for the construction of underground tunnel structures in domestic cities are open-cut method, shallow-buried underground method and shield method, but these three methods are restricted by the surrounding environment to varying degrees in the actual use process. [0003] (1) Open cut method In the case of the construction of underground space structures under the conditions of heavy traffic on the ground in the city, many surrounding buildings and many underground pipelines, traffic must be dredged or even interrupted, and pipelines must be relocated when necessary. In addition, during the construction process of open cut method, the demolition workload of ground structures is heavy, and the noise and vibration generated will also seriously interfe...

AI Technical Summary

Problems solved by technology

However, the shield method has disadvantages such as incompatibility with stratum changes and fixed sections.

Especially in the construction of the subway project, the interval tunnel built by the shield method and the station construction have contradictions in the construction period and organization, and the shield machine is frequently turned around and disassembled, etc., and the advantages of the rapid construction of the shield method cannot be fully utilized.

[0006] Especially when building a short-distance shallow tunnel across the river, the buried depth is relatively shallow and the tunnel is not long, so it is not suitable for shield construction

In addition, it is not suitable to use the underground excavation method for construction under the water, because it is afraid of water penetration, which is very dangerous

Moreover, in order to ensure navigation, only segmental construction can be adopted.

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