本文介绍了在隧道开挖阶段采用仪器,可对掌子面前方＞100 m 的地质不确定因素进行间断式或连续探测,勘察出地质的地震反射数据,分别对地下含水带、洞穴、断层和破碎带进行评估,结合P波和S波的速度及密度分析了弹性材料中的应力和应变的关系.通过地震勘探计算分析可以充分了解地质层的结构,对地质灾害风险进行评估和预测,为地下工程施工人员及隧道通车的安全性提供了保障,有利于减少后期项目的维修成本,提高经济效益.
Prediction of Geological Risk of Tunnel and Underground Space by Seismic Prospecting
This paper introduces the use of instruments in the tunnel excavation stage,which can detect geological uncertainties＞100 m in front of the face of the face intermittently or continuously,and detect the seismic reflec-tion data of the geology,respectively to evaluate the underground water-bearing zone,cave,fault and fracture zone,combined with P wave and S wave velocity and density to analyze the relationship between stress and strain in elastic materials.Through seismic exploration calculation and analysis,we can fully understand the structure of the geological layer,assess and predict the disaster risk of the site,and provide guarantee for the safety of under-ground engineering construction personnel and tunnel traffic,which is conducive to reducing the maintenance cost of the later project and improving the economic efficiency.
seismic explorationwave impedanceYoung's moduluspoisson's ratio
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