Support form for realizing mining method tunnel small radius turning and construction method

Abstract

The invention relates to the technical field of underground structure engineering, in particular to a support form for realizing mining method tunnel small radius turning and a construction method. The construction method comprises the steps that a plurality of standard-range grating steel frame supports are used, after inner side steel frames are densely distributed, semi-range off-standard grating steel frames are crisscross arranged between outer side standard-range grating steel frames under the condition of the interval of the outer side steel frames being larger than the design requirement, and soon, internal chambers with different partitions are excavated in order. According to the support form for realizing mining method tunnel small radius turning and the construction method, theconstruction form of high section surface can be avoided during tunnel construction, the smallest tunnel turning radius is brought, the safety is high, the economic benefits are good and the construction period is saved in the process of city tunnel construction, and the influence of other underground facilities such as water pipe lines on the construction is reduced to the minimum.

Description

technical field [0001] The invention relates to the technical field of underground structure engineering, in particular to a support form and a construction method for realizing small-radius turns of mining tunnels. Background technique [0002] With the increasing frequency of urban underground infrastructure, the construction of underground tunnels has been paid more and more attention. In the excavation process of underground tunnels, the mining method is often used, that is, the planned tunnel is supported, and then excavated in blocks. However, when it is necessary to construct a small-radius continuous turning tunnel, the traditional construction method is to adjust the height of the tunnel section in advance, and then open the horse head door on the side wall of the elevated section to realize the turning. This method is not only more cumbersome in the process, but also increases The risk during construction reduces the construction efficiency. The more serious probl...

AI Technical Summary

Problems solved by technology

However, when it is necessary to construct a small-radius continuous turning tunnel, the traditional construction method is to adjust the height of the tunnel section in advance, and then open the horse head door on the side wall of the elevated section to realize the turning. This method is not only more cumbersome in the process, but also increases The risk during construction reduces the construction efficiency. The more serious problem is that when encountering underground pipelines or other structures, it is impossible to turn the horse's head door by raising the tunnel section. In this case, people can only modify the tunnel line To bypass underground pipelines or structures and seek open underground space with elevated sections, this not only delays the construction period, but also causes a lot of economic losses

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