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隧道地质条件多变复杂,隧址常常经过一些浅埋偏压破碎地段,施工中由于对围岩预测的不准确或施工不规范在开挖时容易出现塌方冒顶等事故,产生影响施工进度、人员伤亡、财产损失的严重后果,在社会上造成很坏的影响。研究快速、安全、经济的通过隧道浅埋破碎偏压地段是高速公路建设的未来重大课题方向,也是现场施工必须解决的重要问题。本文结合岩门口隧道工程实际情况,针对岩门口浅埋偏压隧道围岩应力、变形的复杂情况,对浅埋偏压段关键工序的施工方法和技术措施进行探讨。
Due to the complex and complicated geological conditions of the tunnel, tunnels often pass through some shallowly crushed, fragmented sections. In the construction, due to inaccurate prediction of surrounding rock or irregular construction, accidents such as landslide and roof collapse are likely to occur during excavation, which may affect the construction progress. The serious consequences of casualties and property damage have had a very bad social impact. It is an important task in the future to study the rapid, safe and economical shallow crushing and biasing of tunnel through tunnels. It is also an important issue that must be solved in site construction. According to the actual situation of Yanmenkou tunnel project, the construction methods and technical measures of the key processes of shallow bias section are discussed in view of the complicated situation of rock surrounding rock in the shallow buried biased tunnel in Yanmenkou.