西气东输二线1~#隧道南口工程地质安全评价
|
摘要
根据调查资料对西气东输二线工程1#隧道南口的地质安全进行分析评价.1#隧道工程地质安全隐患为进硐口的危岩崩塌、不稳定斜坡、弃渣边坡和围岩稳定性.对隧道围岩计算得出岩体强度应力比均大于6.该隧道围岩能够承受围岩应力的作用,不会产生过大的整体塑性变形、剪切及弯折等变形破坏,但围岩中体存在分离块松动坍塌的可能性.从预防、治理和监测3个方面提出对策建议.
The security assessment of the southern entrance of tunnel No.1 on the pipeline project-Ⅱ of west-to-east gas transportation is to be performed on the basis of investigation data.There are hidden troubles of security such as some crag,rockfall,unstable slope,tunnel constructing dregs's slop and adjoining rock stability in the entrance of tunnel No.1.It was found after computation that the strength-stress ratios of wall rocks were more than 6.The stress,plastic metamorphose,shearing,and flexure deformations that might take place would be within acceptable range.Nevertheless,it might be possible that some cohesionless stuff collapse in separated blocks of adjoining rock would happen.A helpful suggestion was provided in this paper in connection with their preventing,treating and monitoring.
The security assessment of the southern entrance of tunnel No.1 on the pipeline project-Ⅱ of west-to-east gas transportation is to be performed on the basis of investigation data.There are hidden troubles of security such as some crag,rockfall,unstable slope,tunnel constructing dregs's slop and adjoining rock stability in the entrance of tunnel No.1.It was found after computation that the strength-stress ratios of wall rocks were more than 6.The stress,plastic metamorphose,shearing,and flexure deformations that might take place would be within acceptable range.Nevertheless,it might be possible that some cohesionless stuff collapse in separated blocks of adjoining rock would happen.A helpful suggestion was provided in this paper in connection with their preventing,treating and monitoring.
引文
[1]国家地震局.中国地震烈度区划图[M].北京:国家技术标准出版社,1990.
[2]新疆地调院.西气东输二线管道工程场地主要断裂活动性评价报告,D-2066/明[R].乌鲁木齐:新疆地调院,2007.
[3]国家质量技术监督局.GB 18306—2001中国地震动参数区划图[S].北京:地震出版社,2001.
[4]EBERHARDT E,STEAD D,STI MPSON B.Quantifying pro-gressive pre-peak brittle fracture damagein rock during uniaxi-al compression[J].International Journal of Rock Mechanicsand Mining Sciences,1999,36:361-380.
[5]LABUZ J F,BIOLZI L.Characteristic strength of quasi-brittlematerials[J].International Journal of Solids Structures,1998,35(31):4191-4203.
[6]HIRATA T,SATOH T,ITO K.Fractal structure of spatialdistribution microfracturingin rock[J].Geophys J Rastr Soc,1987,90:367-374.
[7]CHANG S H,LEE C I.Esti mation of cracking and damagemechanisms in rock under triaxial compression by moment ten-sor analysis of acoustic emission[J].International Journal ofRock Mechanics&Mining Sciences,2004,41:1069-1086.
[8]周辉,张传庆,冯夏庭,等.隧道及地下工程围岩的屈服接近度分析[J].岩石力学与工程学报,2005,24(17):3083-3087.
[9]中华人民共和国交通部.JTG D70—2004公路隧道设计规范[S].北京:人民交通出版社,2004.
[10]吉小明.隧道开挖的围岩损伤扰动带分析[J].岩石力学与工程学报,2005,24(10):1697-1702.
[11]张倬元,王士天,王兰生.工程地质分析原理[M].北京:地质出版社,1994.
[12]CAI M,KAISER P K.Assessment of excavation damagedzone using a micromechanics model[J].Tunnelling and Un-derground Space Technology,2005,20:301-310.
[13]中华人民共和国建设部.GB 50021—2001岩土工程地质勘察规范[S].北京:中国建筑工业出版社,2002.
[2]新疆地调院.西气东输二线管道工程场地主要断裂活动性评价报告,D-2066/明[R].乌鲁木齐:新疆地调院,2007.
[3]国家质量技术监督局.GB 18306—2001中国地震动参数区划图[S].北京:地震出版社,2001.
[4]EBERHARDT E,STEAD D,STI MPSON B.Quantifying pro-gressive pre-peak brittle fracture damagein rock during uniaxi-al compression[J].International Journal of Rock Mechanicsand Mining Sciences,1999,36:361-380.
[5]LABUZ J F,BIOLZI L.Characteristic strength of quasi-brittlematerials[J].International Journal of Solids Structures,1998,35(31):4191-4203.
[6]HIRATA T,SATOH T,ITO K.Fractal structure of spatialdistribution microfracturingin rock[J].Geophys J Rastr Soc,1987,90:367-374.
[7]CHANG S H,LEE C I.Esti mation of cracking and damagemechanisms in rock under triaxial compression by moment ten-sor analysis of acoustic emission[J].International Journal ofRock Mechanics&Mining Sciences,2004,41:1069-1086.
[8]周辉,张传庆,冯夏庭,等.隧道及地下工程围岩的屈服接近度分析[J].岩石力学与工程学报,2005,24(17):3083-3087.
[9]中华人民共和国交通部.JTG D70—2004公路隧道设计规范[S].北京:人民交通出版社,2004.
[10]吉小明.隧道开挖的围岩损伤扰动带分析[J].岩石力学与工程学报,2005,24(10):1697-1702.
[11]张倬元,王士天,王兰生.工程地质分析原理[M].北京:地质出版社,1994.
[12]CAI M,KAISER P K.Assessment of excavation damagedzone using a micromechanics model[J].Tunnelling and Un-derground Space Technology,2005,20:301-310.
[13]中华人民共和国建设部.GB 50021—2001岩土工程地质勘察规范[S].北京:中国建筑工业出版社,2002.
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心