Novel support method applicable to shallow-buried subsurface tunnel of soft soil stratum

Abstract

The invention relates to a novel support method applicable to a shallow-buried subsurface tunnel of a soft soil stratum. The novel support method is invented to solve the problem that a reinforcing system of the existing shallow-buried undermining method cannot be applied to mucky soil stratum conditions. The method applies a metro jet system (MJS) to the shallow-buried undermining method, and extends an application scope of the shallow-buried undermining method.Since the quality of a horizontal reinforcing pile body of the MJS is reliable, the reinforcing pile body can also serve as an initial liner of the tunnel, and a cross section and a reinforcing scope of the reinforcing pile body can be adjusted to a great extent.According to the method, with the adoption of the MJS, construction parameters are controllable during a whole course, a construction process has very small influence on an environment, no hazardous substance is discharged outwards at the same time, and pollution to a surrounding soil body and a water area can be avoided.The method is economical, reliable and wide in application scope.

Description

technical field [0001] The invention relates to a novel support method for shallow-buried tunnels suitable for soft soil strata by using the MJS construction method. Background technique [0002] With the development of economy, more and more cities are facing increasing traffic pressure. Under the circumstances that there is almost no room for redevelopment of the ground space, the underground transportation system has become an important means to solve the traffic problem. The construction of subway systems has become the development trend of almost all big cities, which undoubtedly plays a very important role in sharing the flow of people on the ground, but the problem is that the subway system cannot divert the traffic volume of cars. For this reason, the first- and second-tier cities represented by Shanghai are already building or planning underground expressway systems to divert ground traffic and improve travel efficiency. Due to the need to reserve space for the su...

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Problems solved by technology

The construction of subway systems has become the development trend of almost all big cities, which undoubtedly plays a very important role in sharing the flow of people on the ground, but the problem is that the subway system cannot divert the traffic volume of cars

For the silty soil that is common in the Yangtze River Delta region, especially when there is a high groundwater level at the same time, the construction of the tunnel using the shallow buried excavation method will face insufficient support rigidity, water leakage from the support system and deformation of the surrounding environment. Control and other issues, the construction risk is very high

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