Large-diameter shield tunnel deformation control structure and construction method thereof

Abstract

The invention discloses a large-diameter shield tunnel deformation control structure and a construction method thereof. The structure is installed in the construction period of a shield tunnel and comprises a bag expansion type dewatering and drainage pre-stressed anchor rod, a bag expansion type pre-stressed anchor rod, a water storage and drainage tank and a control system. The contact area between the bag expansion type dewatering and drainage pre-stressed anchor rod and a soil layer below the shield tunnel and the contact area between the bag expansion type dewatering and drainage pre-stressed anchor rod and a soil layer above the shield tunnel are increased through expansion type bags, the pulling resistance is increased, and uneven floating or settlement disasters of the large-diameter shield tunnel can be effectively prevented; prestress is symmetrically applied to the bag expansion type dewatering and drainage pre-stressed anchor rod and the bag expansion type pre-stressed anchor rod, resistance for convergence deformation is formed on a large-diameter shield tunnel section, and convergence deformation of the large-diameter shield tunnel section and engineering diseases possibly caused by the convergence deformation are effectively prevented and treated; and floating or sedimentation of the large-diameter shield tunnel is controlled through the combined effect of the bag expansion type dewatering and drainage pre-stressed anchor rod and the water storage and drainage tank.

Description

technical field [0001] The invention relates to the technical field of convergence deformation control of shield tunnels, in particular to a large-diameter shield tunnel deformation control structure and a construction method thereof. Background technique [0002] In recent years, many large-diameter shield tunnel projects have been planned and built in large and super-large cities at home and abroad, and the traffic lanes or tracks of urban underground traffic have been increased through driving modes such as "double tunnels and double tracks" and "highway-rail mixed traffic" To a certain extent, it increases the efficiency of vehicle traffic, relieves traffic pressure, and provides the impetus for urban development. [0003] The well-developed urban shallow space and the demand for the construction of river-crossing tunnels and sea-crossing tunnels have led to an increasing burial depth of newly added large-diameter tunnels. For large-diameter shield tunnels passing throu...

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