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采用人劈裂机凿岩或静态破碎剂破岩,施工进度慢,每天进度约0.3m,下个汛期来临前难以竣工,影响雨水及时排放;采用普通钻爆法施工,给上覆管线和隧洞本身的安全带来隐患。上覆岩层厚度仅为0.5米,属超浅埋隧道;隧洞沿线的管线密集,与煤气管线的最近距离为1.5米,与热力管线的最近距离为0.5米,对爆破振动控制要求极高,按原施工方法,不能满足地面建(构)筑物及隧道工程本体安全要求,并严重影响工程进度。低压准静态微振爆破技术,大大提高了建(构)筑物及隧道工程本体安全性及施工进度,取得了明显的社会效益和经济效益。
The use of artificial split rock drill or static crushing broken rock, the construction progress is slow, the progress of about 0.3m per day, difficult to be completed before the next flood season, affecting the timely discharge of rainwater; using ordinary drilling and blasting construction, overburden and tunnel Their own safety risks. Overlying rock thickness is only 0.5 meters, is an ultra-shallow tunnel; tunnel along the pipeline-intensive, with the gas pipeline closest distance of 1.5 meters, and the heat pipeline closest distance of 0.5 meters, blasting vibration control is extremely demanding, according to The original construction method can not meet the safety requirements for the construction of the ground (structures) and tunneling projects and seriously affect the progress of the project. Low-pressure quasi-static micro vibration blasting technology, greatly improving the building (structure) and tunnel construction ontology safety and construction progress, and achieved significant social and economic benefits.