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A shield tunneling construction method for water-rich upper soft and lower hard composite strata

A technology of composite strata and construction methods, applied in earth-moving drilling, mining equipment, tunnels, etc., can solve problems such as large differences in physical property indicators, tool wear, etc., to reduce the risk of water inrush, facilitate cutting, and achieve good material adaptation sexual effect

Active Publication Date: 2022-05-24
CCFEB CIVIL ENG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the above problems, the present invention provides a shield excavation construction method for water-rich upper-soft-lower-hard composite strata, which solves the problems of cutter head and tool wear caused by the large difference in physical property indicators between the upper and lower strata during the shield excavation process , which saves the construction cost of shield tunneling and makes the working environment more green and environmentally friendly

Method used

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  • A shield tunneling construction method for water-rich upper soft and lower hard composite strata
  • A shield tunneling construction method for water-rich upper soft and lower hard composite strata
  • A shield tunneling construction method for water-rich upper soft and lower hard composite strata

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Embodiment 1

[0035] A shield tunneling construction method for a rich water-soft-lower-hard composite stratum, please refer to figure 1 , figure 2 , including the following steps:

[0036] 1) Geological survey

[0037] Before excavation in the shield section, use ground drilling detection or advance geological detection of the shield tunnel face to detect the upper soft and lower hard composite strata (that is, the shield tunnel face) in the shield tunnel face within the excavation range. The upper part of the face is a soft stratum, and the lower part of the shield tunnel face is an interval section of a hard stratum) to carry out geological survey to obtain the geological survey data of this section;

[0038] 2) Determine the cutting area

[0039] According to the geological survey data obtained in step (1), determine the hard stratum region in the face of the shield tunnel, and use the hard stratum region in the face of the shield tunnel as the cutting area 5;

[0040] 3) Cut the a...

Embodiment 2

[0047] Taking the first-phase civil construction construction of a city public transport supporting project in a certain shield tunnel section as an example, the shield tunneling construction method of the present invention is used in the composite stratum with rich water and soft bottom. Please refer to figure 1 , figure 2 , including the following steps:

[0048] 1) Geological survey

[0049] Before excavation in the shield section, use ground drilling detection or advance geological detection of the shield tunnel face to detect the upper soft and lower hard composite strata (that is, the shield tunnel face) in the shield tunnel face within the excavation range. The upper part of the surface is the soft stratum, and the lower part of the shield tunnel face is the interval part of the hard stratum) to carry out geological survey to obtain the geological survey data of this interval, see Table 1 and Table 1 for details. image 3 , Figure 4 ;

[0050] Table 1 The survey res...

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Abstract

The invention discloses a shield excavation construction method for water-rich upper-soft-lower-hard composite strata, which is characterized in that it comprises the following steps: 1) detecting the geological general situation; 2) determining the cutting area; 3) forming holes in the cutting area: Drill a number of edge holes on the edge, drill a number of inner holes with the same depth as the edge holes in the cutting area, and control the positions of the edge holes and the inner holes so that the edge holes and the inner holes are distributed in a grid pattern; 4) Drilling and wire cutting: use ultra-high pressure abrasive water jet to cut along the inner hole and the edge hole, control the cutting depth to be less than or equal to the depth of the edge hole, so that the cutting line is connected with the inner hole and the edge hole to form a grid structure, so that the The hard stratum area in the face of the shield tunnel is cut into rock-soil blocks; 5) The upper soft and lower hard composite stratum is excavated. The invention solves the problems of the wear and tear of the cutter head and the tool caused by the large difference in the physical property indexes of the upper and lower strata during the shield tunneling process, saves the construction cost of the shield tunneling, and makes the working environment more green and environment-friendly.

Description

technical field [0001] The invention relates to the technical field of shield tunneling, in particular to a shield tunneling construction method for a water-rich soft-bottom hard composite stratum. Background technique [0002] The shield method is one of the most advanced construction methods for building underground tunnels. With the rapid development of my country's economy, the process of urbanization is accelerating, and the scale of cities is also increasing. As a result, the requirements for shield tunneling technology are also increasing. [0003] The shield method is generally only suitable for relatively homogeneous soft soil, soft rock formations or sand layers and their interlayers. In relatively homogeneous strata, the shield tunneling method is used for construction. The shield tunneling method and tunneling mode are relatively simple, the tunneling direction is easy to control, and the tunneling parameters are relatively stable, so the shield tunneling diffi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21D9/087E21D9/08E21D9/12
CPCE21D9/0873E21D9/08E21D9/12
Inventor 张胥吴波孙文涛黄仁蒙国往罗桂军周志强何彭黄宗辉邹广庚陈龙
Owner CCFEB CIVIL ENG
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