Shield tunnel karst cave filling method

Abstract

The invention discloses a shield tunnel karst cave filling method, and relates to the technical field of shield tunnel karst cave filling. The shield tunnel karst cave filling method comprises the following steps that (1) shield muck transportation is carried out, wherein shield muck is transported from an adjacent subway tunnel section to a karst cave filling construction site; (2) shield muck property testing is carried out, wherein tested shield muck moisture content sampling and particle gradation are carried out; (3) grouting hole construction and pipeline connection are carried out, wherein a geological drilling machine is used for drilling holes in the top of a karst cave, grouting pipe embedding is carried out, and grouting pipe connecting is carried out; (4) shield muck cement paste configuration is carried out, wherein according to the shield muck property, pebbles with the particle size larger than 30 mm are screened out, cement and water are added, and a stirring trailer pump is used for configuring shield muck cement slurry; and (5) grouting filling of the karst cave is carried out, wherein the shield muck cement slurry is pumped for karst cave grouting construction, and the slurry is injected for karst cave filling. By means of the shield tunnel karst cave filling method, shield muck is used as a grouting material, the stirring trailer pump is used for configuringthe shield muck cement slurry, muck is absorbed while quick filling of the shield tunnel karst cave is carried out, and the grouting material is saved.

Description

technical field

[0001] The invention relates to the technical field of shield tunnel karst cave filling, in particular to a shield tunnel karst cave filling method. Background technique

[0002] In the past 30 years, China's subway has developed rapidly. At present, there are 53 cities with subways under construction, and the scale of lines under construction is 6,374 kilometers. The shield tunneling method is mainly used in the construction of subway tunnels. Due to the increasing amount of shield muck generated by shield tunneling construction, the landfilling and disposal of muck occupies a large amount of land. Improper landfilling can easily cause landslides and bring great pressure to the city. . At the same time, in the construction of subways in many cities, karst caves are frequently encountered in the construction of subway tunnels, which brings great safety hazards to the shield construction. Safety accidents such as tunnel collapse and water gushing occurred. ...

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