Construction method of anti-floating, anti-sinking, anti-water pressure and shock-absorbing tunnel in water-rich unconsolidated stratum

Abstract

The invention relates to a method for constructing an anti-floating anti-sinking anti-hydraulic pressure damping tunnel in a water-rich unconsolidated stratum. The method comprises the following steps of constructing a two-layer primary support; constructing steel pipe piles traversing an inverted arch of the primary support; making the lower ends of the steel pipe piles be fixedly connected to a stable stratum under the primary support; laying a movable filling layer on the inverted arch of the primary support; constructing an inverted arch of a first layer of secondary lining and a short wall on the movable filling layer; making the inverted arch of the first layer of secondary lining be in rigid connection with the upper ends of the steel pipe piles; filling the gap between the short wall and the primary support with the movable filling layer; constructing an arch wall and an arch ring of the first layer of secondary lining, and reserving fill orifices in the arch ring of the first layer of secondary lining; filling the gap between the first layer of secondary lining and the primary support with a lightweight buffer layer; and laying a water proof layer which is enclosed in the whole circumferential direction on the inner surface of the first layer of secondary lining, and constructing a second layer of secondary lining. The method for constructing the anti-floating anti-sinking anti-hydraulic pressure damping tunnel in the water-rich unconsolidated stratum is high in pertinency, and the construction procedure is reasonably arranged.

Description

technical field [0001] The invention relates to the field of tunnels, in particular to a construction method for an anti-floating, anti-sinking, anti-water pressure and shock-absorbing tunnel in a water-rich unconsolidated strata. Background technique [0002] In water-rich unconsolidated strata, when the surrounding stratum consolidates, the tunnel structure will subsequently settle, and the clearance and alignment of the tunnel will be seriously affected. For this reason, pile foundations are usually set at the bottom of the inverted arch in the design to maintain The relative stability of the tunnel structure ensures the stability of the line. In the composite tunnel structure, the secondary lining and the primary support are in close contact, and they deform and bear forces together. When the pile foundation at the bottom remains relatively stable, the secondary lining and the primary support will bear the load of the overlying soil column and the additional passive eart...

AI Technical Summary

Problems solved by technology

Today, the anti-floating, anti-sinking, anti-water pressure and shock-absorbing tunnels are designed to adapt to rich water unconsolidated strata. The previous tunnel construction methods are not suitable for the construction of new tunnels.

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