高地应力大变形隧道变形特性及工程应对措施分析

在建都汶高速公路龙溪隧道为高地应力、高瓦斯隧道,针对龙溪隧道高地应力挤压变形的特殊性,分析了隧道施工过程中因高地应力造成的隧道大变形的特点,分析了大变形机理,在此基础上对典型地段进行了数值分析,确定了大变形地段安全、经济、合理的支护参数。龙溪隧道大变形段后续施工实践表明,数值分析确定的支护参数和论文提出的施工措施有效地限制了隧道的高地应力挤压变形,确保了隧道的施工安全。龙溪隧道的施工实践为高地应力隧道的施工提供了有意义的技术资料,可供同类隧道施工借鉴。

Analysis on Deformation Characteristics and Counter Measures about High Ground Stress and Big Distortion Tunnel

Longxi Tunnel of Duwen Expressway under constraction is the one with high ground stress and high gas.According to the specificity of the tunnel,the characteristics and mechanism of large deformation caused by the high ground stress during construction of the tunnel are analyzed here,and based on the analysis,the numerical analyses are made for some typical sections,at last,the security,economic and reasonable supporting parameters in the area of large deformation are determined.It is shown by the subsequent...