City tunnel drilling and milling machinery combination non-exploding excavation technique

Abstract

The invention discloses a city tunnel drilling and milling machinery combination non-exploding excavation technique. The city tunnel drilling and milling machinery combination non-exploding excavationtechnique is implemented according to the following steps that (1), construction measuring is conducted; (2), mechanical drilling is conducted, specifically, during upper bench tunneling construction, drilling is conducted by adopting a drilling machine to form a free face, an arched wall is subjected to drilling cutting along an excavation side line, and cannon head induction holes are drilled in the tunnel face; (3), tunneling excavation is conducted, specifically, excavation is conducted on the tunnel face through a bench method; (4), milling excavation trimming is conducted, specifically,trimming is conducted through a milling excavation machine, under-excavation bodies are subjected to milling excavation, residues are cut, and broken rock mass on the arch crown and the tunnel face are cleared; (5), tunnel slag discharging is conducted; and (6), preliminary supporting and secondary lining are conducted, specifically, after each ring of tunnel tunneling is completed and the tunnelface is cleaned up, preliminary supporting construction is conducted in time, and surrounding rock is solidified and sealed through the mode of combination of anchoring, netting, pushing and spraying. According to the construction method, blasting shaking damage is completely eradiated from the source, disturbance on the surrounding rock and earth surface buildings is reduced, and the risks of earth surface sedimentation and tunnel collapse are reduced.

Description

technical field [0001] The invention belongs to the technical field of tunnel excavation, in particular to a non-explosive excavation method for tunnels. Background technique [0002] Since urban tunnels are located in or adjacent to urban areas, their site and surrounding areas are highly developed, and the terrain is greatly affected by human activities. There are often many buildings on the top of the tunnel, and the buried depth is relatively shallow. The traditional drilling and blasting method during construction will inevitably affect the construction. Structures cause impact, cause ground subsidence, building structures cracking, etc., cause social instability and other social contradictions, and bring severe challenges to tunnel builders. It can be seen that those skilled in the art urgently need to design an effective way to avoid blasting shock damage. It is a construction method that effectively prevents the impact of conventional drilling and blasting on the sur...

AI Technical Summary

Problems solved by technology

[0002] Since urban tunnels are located in or adjacent to urban areas, their site and surrounding areas are highly developed, and the terrain is greatly affected by human activities. There are often many buildings on the top of the tunnel, and the buried depth is relatively shallow. The traditional drilling and blasting method during construction will inevitably affect the construction. Structures cause impact, cause ground subsidence, building structures cracking, etc., cause social instability and other social contradictions, and bring severe challenges to tunnel builders. It can be seen that those skilled in the art urgently need to design an effective way to avoid blasting shock damage. , effectively eliminate the impact of conventional drilling and blasting methods on the surrounding environment, and ensure the safety of buildings and structures

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