Construction method of crossing anti-seepage slab wall in shield section construction

Abstract

The embodiment of the invention provides a construction method for crossing an impermeable plate wall during construction of a shield section. The construction method comprises the following steps that newly-additionally-arranged impermeable walls are arranged before a shield machine crosses the impermeable plate wall, a closed area capable of completely accommodating the shield machine is definedby the newly-additionally-arranged impermeable walls in a surrounding mode, andthe central axisof the impermeable plate wall and thecentral axis of a tunnel penetrate through the closed area; soil reinforcement construction is carried out on the closed area; and the shield machine is pushed to pass through the closed area so as to complete the construction for crossing the impermeable plate wall.According to the provided method, the impermeability of the impermeable plate wall can be improved, and the posture of the shield machine is controlled, so that damage to the impermeable plate wall is reduced, and the flood control effect of a river bank is improved.

Description

technical field [0001] The invention relates to the field of municipal engineering construction, in particular to a construction method for shield section construction through anti-seepage slab walls in tunnel construction. Background technique [0002] The anti-seepage slab wall is a continuous wall built in a loose permeable layer or an earth-rock dam (weir) to prevent seepage. The anti-seepage board wall can be built on the backwater side of the embankment to improve the flood control effect of the embankment. [0003] When excavating a tunnel with the shield method, it is necessary to pass through the anti-seepage board wall first, and when passing through the anti-seepage board wall, it will cause local damage to the anti-seepage board wall, and the water flow will concentrate and infiltrate from the damaged part of the anti-seepage board wall, affecting the anti-seepage board wall. The anti-seepage ability of the seepage board wall; at the same time, when the shield m...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the technical problems in the prior art that the construction method of shield tunneling section crosses the anti-seepage slab wall, the anti-seepage slab wall is poor, the posture of the shield machine is difficult to control, the destructive power to the anti-seepage slab wall is large, and the flood control effect of the embankment is affected. , the present invention provides a construction method for crossing the anti-seepage slab wall in the construction of the shield interval, the method can enhance the anti-seepage ability of the anti-seepage slab wall, control the posture of the shield machine, reduce the damage to the anti-seepage slab wall, and improve Flood control effect of embankment

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