Construction method of earth pressure balance shield tunneling machine muck pressure maintaining pumping device

Abstract

The invention discloses a construction method of an earth pressure balance shield tunneling machine muck pressure maintaining pumping device. Before an earth pressure balance shield tunneling machine is tunneled into a stratum which is high in water permeating performance or high in requirement for sedimentation controlling, the soil outlet of the earth pressure balance shield tunneling machine is connected with a pressure maintaining pumping device body, bentonite or foam and others used for preventing gushing is added to a soil bin to carry out muck improvement in the pumping process, the pressure in the soil bin of the earth pressure balance shield tunneling machine can be effectively controlled by controlling the discharge capacity of the pumping device body, gushing or poor sedimentation controlling and other situations are avoided, the earth pressure balance shield tunneling machine can have the functions of an earth pressure shield and a slurry shield and is especially suitable for requirement of composite stratum construction, the requirement of stratum construction with different conditions can be met conveniently and quickly, and therefore the construction difficulty is greatly lowered, the construction cost is greatly reduced, and the construction safety is greatly improved.

Description

technical field [0001] The invention relates to the field of shield tunneling method construction in tunnel engineering construction technology, in particular to a construction method using an earth pressure balance shield machine dregs pressure maintaining pumping device. Background technique [0002] With the large-scale development of domestic subway construction, the shield construction method is widely used in the construction of subway sections due to its characteristics of safety, speed, and wide adaptability. At present, the mainstream shield machines in the world are divided into slurry shield machines and earth pressure shield machines, but all types of shield machines have certain limitations, although the application range of earth pressure balance shield machines can be expanded to However, in the non-cohesive soil layer with low fine sand content, the use of traditional earth pressure balance shield machine in the stratum with strong water permeability and high...

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Problems solved by technology

[0003] The purpose of the present invention is to aim at the limitation of using the traditional earth pressure balance shield machine for construction, and to provide a construction method using the earth pressure balance shield machine dregs pressure maintaining pumping device, by using the traditional earth pressure balance shield machine Connect with the pressure-maintaining pumping device to expand the scope of use of the earth pressure balance shield machine, and solve the problems of poor gushing and settlement control of the earth pressure balance shield machine in the construction of strata with strong water permeability and high requirements for settlement control