摘要
贵广铁路东科岭隧道进口段穿越广西花山花岗岩体与围岩的接触蚀变带。施工过程中,发生了全风化花岗岩段流砂冒顶、大理岩段地表塌陷及基底集中涌水涌砂、角岩化蚀变砂页岩段洞顶坍塌及挤出变形等病害。通过补充钻探、物探、室内试验等工作,分析了病害发生的地质原因。对冒顶、坍塌及挤出变形病害采取了针对性的整治措施,顺利通过了花岗岩蚀变带,保证了工程的安全。
Dongkeling Tunnel of Guiyang- Guangzhou Railway passes through the granite and surrounding rock contacting alteration zone of Huashan Mountain, Guangxi. In construction process, diseases happen, such as roof caving of quicksand in completely weathered granite section, surface subsidence, water bursting and mud surging in marble section, tunnel top collapse and extrusion deformation in hornstone sandshale section. The geological causes for diseases are analyzed by additional exploration, geophysical prospecting, laboratory test, etc. Targeted control measures are respectively taken for roof caving and ion deformation to smoothly pass through granite alteration zone and ensure the safety of the engineering.
出处
《路基工程》
2015年第3期232-237,242,共7页
Subgrade Engineering
关键词
花岗岩蚀变带
病害
地质原因
整治措施
Granite alteration zone
diseases
geological causes
control measure
