Constructing method for shield entering into hole while passing through pipeline

Abstract

The invention relates to a constructing method for a shield entering into a hole while passing through a pipeline. The constructing method comprises the following steps: (1) reinforcing an end shaft three-axe agitating pile entering into the hole and a rotary spraying pile, increasing a reinforcing area to 9 meters and keeping a reinforcing depth as 3 meters under a tunnel; (2) arranging a row of isolating piles between a sewage pipe and a station end shaft, isolating a lateral soil pressure of a soil body under the sewage pipe, and preventing pipeline settlement caused by a released soil pressure stress, wherein the isolating piles are three-axe agitating piles; (3) arranging four dewatering wells in a scope of entering the hole, dewatering and reducing a water level to 1 meter under a hole door; (4) except mounting a waterproof device around the hole door, mounting a double-layer spring steel plate, and filling sponge in the middle; (5) finishing an operation of chiseling the hole door within the shortest time; (6) adjusting all parameters, causing the shield to safely and quickly enter into the hole while passing through the pipeline; and (7) cleaning soil and turning a shielding machine. The constructing method provided by the invention has the advantages that the shielding machine successfully enters into the hole while passing through the pipeline, a successful construction case of a high-risk construction process of entering the hole of the shield under a complex condition is achieved, and abundant construction experiences for silt construction and close-range pipeline passing of the shield are provided.

Description

technical field [0001] The invention relates to a construction method for a shield machine to enter a hole in the process of crossing a pipeline. Background technique [0002] At present, shield tunneling method construction in underground rail transit construction has significant advantages such as high degree of automation, low labor intensity, fast construction speed, small environmental impact, safety and reliability, and combined with the complex and changeable conditions in the city, shield tunneling method is widely used in underground rail transit. It is more and more widely used in traffic construction. Although shield construction has many advantages, and the performance of shield machines has been continuously improved in the development of more than 100 years, and the theory of design and construction technology has been continuously improved, the ground movement caused by construction will affect the surrounding buildings, roads, pipelines, hazards and risks. A...

AI Technical Summary

Problems solved by technology

Although shield construction has many advantages, and the performance of shield machines has been continuously improved in the development of more than 100 years, and the theory of design and construction technology has been continuously improved, the ground movement caused by construction will affect the surrounding buildings, roads, pipelines, hazards and risks. Accidents still happen from time to time, and the tunnel itself is prone to adverse consequences due to improper construction

If during the excavation process of the tunnel, the characteristics of the surrounding stratum cannot be accurately predicted, and the deformation characteristics of the soil around the tunnel cannot be obtained, then the construction may cause huge damage to the underground pipelines and surface structures around the tunnel.

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