Construction method for assisting small-diameter open type TBM tunneling for bad geological hole section pipe shed

A construction method and open technology, which is applied in the field of tunneling with small diameter open TBM assisted by tube sheds in unfavorable geological tunnels, can solve the problems of poor fast passage, fast support, impact on construction efficiency, low construction efficiency, etc. The effect of enhancing the self-stabilizing ability of the surrounding rock, reducing the workload of cleaning slag, and improving the strength of the surrounding rock
CN111335901AInactive Publication Date: 2020-06-26CHINA RAILWAY 18TH BUREAU GRP CO LTD +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHINA RAILWAY 18TH BUREAU GRP CO LTD
Publication Date
2020-06-26
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a construction method for assisting small-diameter open type TBM tunneling for a bad geological hole section pipe shed. The method comprises the following steps: 1) making badgeological hole section construction preparation; 2) reinforcing surrounding rocks as temporary support; 3) expanding and extracting a pipe shed workshop; 4) mounting an anchor rod drilling machine, and performing upper water drainage hole construction on a shield; 5) grouting and solidifying the shield and the upper part of a cutter disc; 6) dismounting the anchor rod drilling machine, and mounting a pipe shed drilling machine; 7) performing open hole drilling and grouting; 8) performing pipe shed drilling and grouting; 9) backfilling an expanding and extracting section; and 10) performing TBM tunneling. The construction method can effectively improve strength of surrounding rocks in front of a TBM cutter disc, strengthens surrounding rock self-stabilizing ability, effectively controls height and the range of a collapse cavity above the shield after open type TBM tunneling, achieves less arch-top slagging, greatly reduces slag clearing workload under bad geological conditions, and realizes that TBM continuously and quickly passes through bad geology.
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Description

technical field

[0001] The invention relates to a construction method for open TBM excavation, in particular to a construction method for small-diameter open TBM excavation assisted by a pipe shed in an unfavorable geological cave section. Background technique

[0002] At present, after more than 60 years of development and improvement of the tunnel boring machine (TBM), the manufacturer of the tunnel boring machine has cooperated with the construction unit to develop a variety of models to adapt to different geological conditions, and to continuously optimize the concept of continuous, balanced and rapid construction. Improve. The traditional TBM method construction is mainly applied to rock formations with certain self-stabilization ability; while the traditional pipe shed support method construction is mainly applied to unsteady rock and soil layers or rock formations with broken zones, alteration zones, fault zones, water gushing and mud gushing, etc. Due to the complex...

Claims

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