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Shield tunnel karst cave filling method

A technology for shield tunnels and karst caves, which is applied in the direction of filling, earthwork drilling, safety devices, etc., to achieve the effects of saving resources, speeding up construction progress, and promoting waste recycling

Active Publication Date: 2019-10-01
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Therefore, there is an urgent need for a new shield tunnel filling method to solve the problems of rapid filling of shield tunnel caverns and slag absorption

Method used

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Embodiment 1

[0027] like Figure 1-2 As shown, the present embodiment provides a shield tunnel filling method, comprising the following steps:

[0028] (1) Shield muck transportation:

[0029] Before the karst cave filling construction, transport the shield slag from the muck storage pool in the subway tunnel construction section that has already started to the karst cave filling construction site, and select the shield slag from the sandy pebble layer without dehydration and drying; Soil transport vehicle 1 uses a muck truck or a mixer truck to transport the shield muck to the cave filling construction site;

[0030] (2) Test of shield muck properties:

[0031] After the shield muck was transported to the treatment construction site of Karst Cave 4, samples were collected for experiments to test the properties of the shield muck: the moisture content of the muck was determined by the drying method, and the particle gradation of the muck was determined by the sieving method. Determine t...

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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. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21F15/00E21F15/06
CPCE21F15/005E21F15/06
Inventor 朱考飞权永华张云毅钟志全张可能罗文马晓磊刘湛李江灵胡德黄思宇杨超陈泽
Owner CENT SOUTH UNIV
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