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Tunneling construction method suitable for strong permeable unconsolidated stratum of karst subsidence area

A technology of karst subsidence and tunnel excavation, applied in tunnels, tunnel linings, underground chambers, etc., can solve problems such as insufficient safety of construction methods, achieve high construction efficiency, ensure safety, and improve construction efficiency

Pending Publication Date: 2022-01-28
CHINA RAILWAY SEVENTH GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Still another object of the present invention is to provide a tunnel excavation construction method suitable for strong permeable and loose strata in karst subsidence areas, so as to solve the complex geological conditions in karst subsidence areas such as highly permeable and loose strata in the prior art, and the construction method is not safe enough. question

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  • Tunneling construction method suitable for strong permeable unconsolidated stratum of karst subsidence area
  • Tunneling construction method suitable for strong permeable unconsolidated stratum of karst subsidence area
  • Tunneling construction method suitable for strong permeable unconsolidated stratum of karst subsidence area

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Embodiment Construction

[0032] The present invention will be further described in detail below in conjunction with the accompanying drawings, so that those skilled in the art can implement it with reference to the description.

[0033]It should be noted that the experimental methods described in the following embodiments, unless otherwise specified, are conventional methods, and the reagents and materials, if not otherwise specified, can be obtained from commercial sources; in the description of the present invention, The terms "landscape", "portrait", "top", "bottom", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", The orientation or positional relationship indicated by "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the referred device or element must have Certain orientations, con...

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Abstract

The invention discloses a tunneling construction method suitable for a strong permeable unconsolidated stratum in a karst subsidence area, which comprises the following steps: dividing a tunnel section into an upper step, a lower step and a tunnel bottom, sequentially lagging for a certain distance, and performing weak blasting excavation, so as to reduce the vibration of surrounding rock to control forming, and performing primary support in time after each time of excavation; and then closing the same section position to form a ring, controlling the arranged tunnel waterproof and drainage system is controlled, preventing collapse caused by excessive deformation of surrounding rock, promoting tunneling construction of the strong permeable unconsolidated stratum in the karst subsidence area. The construction efficiency is high, and the safety is guaranteed.

Description

technical field [0001] The invention relates to the technical field of tunnel construction. More specifically, the invention relates to a tunnel excavation construction method suitable for strong water-permeable loose formations in karst subsidence areas. Background technique [0002] High-speed railway is a national business card of our country. my country's high-speed railway network ranks first in the world. It has the longest high-speed railway mileage, the highest transportation density, and the most complex network operation scenarios in the world. High-speed rail line design standards are high, and bridges and tunnels account for a large proportion. At present, the construction technology of high-speed rail tunnels under complex geological conditions in my country has made great progress. Practical engineering problems such as early-stage diseases appear from time to time. The "Medium and Long-term Railway Network Planning" in the new era clearly puts forward the gui...

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Application Information

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IPC IPC(8): E21D9/00E21D11/10E21D11/38E21D20/02
CPCE21D9/006E21D11/102E21D11/105E21D11/107E21D11/381E21D11/383E21D20/02Y02E10/20
Inventor 单云浩易中平祁子鹏荔大江张洪鹏晏红刘涛许元平欧富豪杨硕杨德煊梁宇杰赵胜杰吴双
Owner CHINA RAILWAY SEVENTH GRP CO LTD
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