Execution method for feeding tiny tunnel into ultra heavy section tunnel transversally

A technology with super large section and construction method, applied in tunnels, earth-moving drilling, mining equipment, etc., can solve problems such as hidden safety hazards, slow construction, long construction period, etc., and achieve the effect of safe construction method, convenient construction and powerful measures.
CN101545376AInactive Publication Date: 2009-09-30THE FOURTH ENG CO LTD OF CTCE GRP
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
THE FOURTH ENG CO LTD OF CTCE GRP
Publication Date
2009-09-30
Estimated Expiration
Not applicable Β· inactive patent

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Abstract

An execution method for feeding a tiny tunnel into an ultra large section tunnel transversally is characterized in that excavating a tiny tunnel top region along its upper bench, enlarging the tiny tunnel towards two sides nearby the large section tunnel to excavate a hole gate segment; excavating an opening segment of the large section tunnel top region transversally from the hole gate segment, and mounting a hoop permanent steel centering in the opening segment after completing construction; excavating a upper part double lateral walls heading of the large section tunnel transversally; thereafter excavating the lower region of the tiny tunnel along a bottom bench, and excavating the opening segment lower region of the large section tunnel locating below the opening segment transversally; excavating the lower part double lateral walls heading of the large section tunnel longitudinally in the lower region of the opening segment; and then excavating the upper part center region and the lower part center region of the large section tunnel longitudinally in sequence. The execution method of the invention is safe and high-efficient.
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Description

technical field

[0001] The invention relates to a construction method applied in the construction of subways, expressways, railways, etc., for entering a tunnel with a small section laterally into a tunnel with a large section. Background technique

[0002] In the prior art, the main construction methods for entering a tunnel with a small section into a tunnel with a large section include the big bag method, the small bag method and the backpick method, etc. These methods all have problems such as different safety hazards and slow construction. Among them, the back-picking method first enters from the lower half of the large-section tunnel, and the upper part of the large-section tunnel needs to be picked up from the lower part. Large potential safety hazard; the small package method needs to be reamed separately, and the progress is slow; the large package method needs to build a construction guide tunnel, and carry out the construction of a large hole in the construction g...

Claims

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