Shield driving mode suitable for soft-hard uneven stratum and conversion method thereof

Abstract

The invention discloses a shield driving mode suitable for a soft-hard uneven stratum. The shield driving mode comprises open type driving, half-open type driving and full earth pressure type driving.The open type driving is a shield driving mode in which no pressure needs to be maintained in an earth bin. Full earth pressure type driving is a shield driving mode in which during shield excavation, earth in the earth bin is pressurized through driving muck, or earth pressure of the excavation face and the pressure of underground water are balanced by pressure generated by injected auxiliary materials, stability of the working face is maintained, and thus ground depression caused by tunnel face collapse or too much stratum water loss is avoided. The half-open mode is between the open type and the full earth pressure type modes. Through a conversion method provided by the invention, a corresponding driving mode can be obtained through conversion according to different strata, and corresponding control parameters are selected.

Description

technical field [0001] The invention relates to the technical field of shield tunnel construction, in particular to a shield tunneling mode suitable for soft and hard uneven strata and a conversion method thereof. Background technique [0002] The shield method is a fully mechanized construction method in the underground excavation method. It supports the surrounding rock through the shield casing and segments to prevent collapse into the tunnel, and at the same time uses cutting devices to excavate the soil in front of the excavation face Excavation is a mechanized construction method in which the excavated soil is transported out of the hole by the excavator, and the thrust is applied to the rear by the jack, and the precast concrete segments are assembled at the end of the shield to form a tunnel structure. Shield tunnel construction is a comprehensive construction technology. The shield tunnel construction process is a complex system that evolves with time and space. Due...

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Problems solved by technology

The existing shield control mode is single, and it is difficult to adapt to the complex stratum with uneven softness and hardness; the selection of tunneling parameters mostly depends on continuous trial excavation, and there is no relatively reliable parameter range suggestion; Shield tunneling is especially necessary, and it can be converted to the corresponding tunneling mode according to different strata

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