河北省滦平县张家湾隧道断裂破碎带特征与围岩失稳研究  

The study on the characteristics of the fault crushed zones and surrounding rock mass stability of a highway tunnel at Zhangjiawan,Luanping,Hebei Province

作　　者：李忠[1] 杨杰[2] 

机构地区：[1]中国矿业大学资源学院,江苏徐州221008 [2]石家庄铁道学院,河北石家庄050043

出　　处：《中国地质灾害与防治学报》2006年第2期15-18,共4页The Chinese Journal of Geological Hazard and Control

摘　　要：根据对张家湾隧道开挖过程中多次发生塌方地段的工程地质调查资料,采用现代地质工程的理论,系统分析了引起张家湾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工程地质特征。研究主要内容包括断裂带及其周围地区的岩石组合特征、地下水特征、断裂构造带应力场及伴生的小构造特征,重点分析了断层带活动对于隧道围岩体的力学性质所产生的影响,通过对比断层破碎带中及两侧岩石风化前后的力学参数,发现了该隧道可能产生塌方的主要地段的识别标志。结合现场实际情况提出在隧道施工中,应对危险岩体地段加强长、短期地质超前预报工作以及通过合理的喷浆、结合钢支撑的组合支护方式,控制隧道变形的防治措施。Depending on the geological features of many collapses in the Zhangjiawan highway-tunnel, we studied the geological-engineering characters of the imbricate fault in Zhangjiawan highway-tunnel using the modem geologicalengineering theory and analysed the main characteristics of the imbricate fault. Because the imbricate fault has caused many collapses during the tunnel discharging, we analysed its structure character, mechanics quality, the present tectonic stress field, and got the identifical symbol of the dangerous rock mass by comparing the mechanics parameters of the rock in the fault and that of beside the fault. Finally, we advise that the best methods to control the tunnel distortion are the enhanced long distance geological forecast and short distance geological forecast, the suitable spry-concrete and the appropriate steel trestle.

关 键 词：叠瓦状断裂带 崩塌识别标志 地质超前预报 隧道 滦平县 

分 类 号：TU45[建筑科学—岩土工程] U45[建筑科学—土工工程]