红旗岭公路隧道叠瓦状断裂破碎带工程地质特征研究

THE STUDY AT THE GEOLOGICAL-ENGINEERING CHARACTERS OF THE IMBRICATE FAULT IN THE HONGOILING HIGHWAY-TUNNEL

本文研究了红旗岭隧道开挖过程中多次发生塌方地段的工程地质特征,分析了引起隧道塌方的叠瓦状断裂带的构造特征、力学性质、以及控制该地区主要地质构造的现代应力场的地质特征,重点分析了断层带活动对于隧道周围岩体中的岩石的力学性质所产生的影响,并结合现场的实际情况提出了对危险地段岩体加强长、短期地质超前预报工作,通过进行喷浆、结合钢支撑的组合支护方式、以控制隧道变形为主的行之有效的防治措施。

In the paper we have studied the geological-engineering characters of the imbricate fault in Hongqiling highway-tunnel. because the imbricate fault has caused many collapses during the tunnel discharging  we have analysed its structure character mechanics quality the present tectonic stress field and the pateotectonic stress field and gotten the identifical symbol of the dangerous rock mass by contrasting the mechanics parameters of the rock in the fault and that of beside fault. And finally we advise that the best methods to control the tunnel distortion are the enhanced long and short distance geological forecast the suitable spry-concrete and the appropriate steel trestle.