【摘要】 太行山隧道是石太客运专线的重点工程,是目前我国在建最长的铁路山岭隧道。该隧道在DK85+055~DK93+900之间穿越累计4 410 m长的膏溶角砾岩地层,这种软岩硬土地层胶结极差,强度低、水理性强,并且有弱膨胀性。为保证隧道的正常施工,掌握围岩动态和支护结构的工作状态,施工过程中进行了系统的监控量测工作,分析了围岩压力、支护应力特征和洞室稳定性状态,反馈信息,指导施工,为隧道顺利建设提供技术支持。更多还原

【Abstract】 Taihang Mountain Tunnel is the longest railway mountain tunnel under construction in china,and is the key project of Shijiazhuang-Taiyuan passenger dedicated line.It goes through gypsum breccia region of about 4 410 meters at DK85+055～DK93+900.The soft-rock-hard-clay stratum has bad cementation,low strength and strong water reaction with slight expansibility.In order to learn the state of surrounding rock and the condition of supporting structure to assure smooth constructing of the tunnel,a systematic monitoring was executed during the construction in gypsum breccia region of Taihang Mountain Tunnel.The surrounding rock pressure,incipient support stress feature and cavern stability state were analyzed and the information was feedback to the construction in time,providing instruction and technical support for the construction of the tunnel.更多还原