A method and system for constructing a shallow buried tunnel

Abstract

The invention discloses a shallow-buried tunnel building method which comprises the following steps: 1, determining a stratum excavation position, and installing a tunnel building device; 2, performing excavation to form a slot: excavating an assembling slot in a stratum; 3, assembling a prefabricated concrete member: conveying the member into the assembling slot, connecting and fastening the member, and assembling a frame type tunnel main body structure; 4, performing backfilling grouting: filling a gap between the assembling slot and the tunnel main body structure with mortar; 5, excavating soil in a tunnel space, so as to form a tunnel between frame bodies of the tunnel main body structure; and 6, building a second lining structure in the tunnel, building an accessory structure and installing electromechanical devices. The invention further provides a shallow-buried tunnel building system which comprises a tunnel building device and the prefabricated concrete member. According to the novel tunnel building method and the novel tunnel building system which are provided by the invention, stratum excavation and use of supporting and protecting structures can be greatly reduced, so that the engineering construction cost is reduced, the construction efficiency is improved, and the construction safety is guaranteed.

Description

technical field [0001] The invention relates to the field of tunnel construction engineering, in particular to a construction method and system for a shallow buried tunnel. Background technique [0002] Under the current situation of rapid urbanization, in order to alleviate traffic pressure and rationally utilize underground space resources, the rapid transformation of urban roads and the construction of urban comprehensive utility corridors have attracted much attention. In the future, such tunnel projects will continue to increase. In the early stage of tunnel construction, the most reasonable construction method will be selected according to the actual situation. For tunnel construction in shallow buried soft soil strata, the commonly used methods are open cut method, shield method, pipe jacking method, shallow buried buried excavation method, etc. [0003] The open cut method is to excavate the soil from the surface, then apply the main structure and backfill. This met...

AI Technical Summary

Problems solved by technology

This method requires the construction of an enclosure system, which is expensive, and sometimes even exceeds 50% of the total project cost. The enclosure structure deep in the ground will also hinder the subsequent development of underground space. The construction steps of backfilling after excavation not only affect the construction period but also increase the cost

The shield tunneling method is a relatively advanced tunnel construction method using a shield machine, but the equipment such as the shield machine is expensive, and it needs to dig a large originating shaft and a receiving shaft, and the vertical transportation costs are high. At the same time, the working environment needs to be ventilated lighting, expensive to build

The pipe jacking method is a construction method that pushes the preset pipe joints into the ground one by one to form a tunnel. This construction method is limited by the length of the fixed push. The longer the route, the greater the thrust loss, so it is not suitable for long-distance construction.

However, the underground excavation method is slow to construct tunnels, with cumbersome procedures, high safety risks, and high costs

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