FLAC3D在地基砂土液化判别中的应用
|
摘要
对于饱和砂土液化的判别,目前规范要求以标准贯入试验为主,但标准贯入试验有一定的局限性.有限差分等数值模拟软件可有效、准确地模拟材料的屈服、塑性流动、软化直至大变形过程,为此采用岩土工程数值分析软件FLAC3D,对南水北调中线工程河南段引水干渠渠基进行砂土液化判别,并与标注贯入法的结果进行对比.结果表明:数值模拟结果与标准贯入法判定液化结果一致,FLAC3D能够反映土层的整体液化性状,对地基砂土液化过程可进行时程监测,从而根据不同土层的液化情况,提出针对性的治理措施.
For the discrimination of the saturated sand liquefaction,the current specification is mainly based on standard penetration test,while standard penetration test has some limitations.Some numerical simulation software such as finite difference can effectively and accurately simulate the material yield,plastic flow,softening and large deformation process.Therefore,FLAC3D,a kind of geotechnical engineering numerical analysis software,is applied to the discrimination of sand liquefaction of canal foundation in Trunk Diversion Channels of North Water Transfer Project in Henan Section.The results are compared with those measured by standard penetration test.The comparative analysis shows the numerical simulation can be applied to the soil liquefaction discrimination,and numerical simulation method is very good to overcome the limitation of standard penetration test,and can reflect the overall liquefaction behavior of soil and the ground liquefaction process monitoring.Thus,for different soil liquefaction situation,some targeted control measures can be proposed.
For the discrimination of the saturated sand liquefaction,the current specification is mainly based on standard penetration test,while standard penetration test has some limitations.Some numerical simulation software such as finite difference can effectively and accurately simulate the material yield,plastic flow,softening and large deformation process.Therefore,FLAC3D,a kind of geotechnical engineering numerical analysis software,is applied to the discrimination of sand liquefaction of canal foundation in Trunk Diversion Channels of North Water Transfer Project in Henan Section.The results are compared with those measured by standard penetration test.The comparative analysis shows the numerical simulation can be applied to the soil liquefaction discrimination,and numerical simulation method is very good to overcome the limitation of standard penetration test,and can reflect the overall liquefaction behavior of soil and the ground liquefaction process monitoring.Thus,for different soil liquefaction situation,some targeted control measures can be proposed.
引文
[1]赵克荣.饱和砂土液化判别方法的局限性及综合应用实例[J].中国煤田地质,2007,19(5):54-57.
[2]张雪枫,刘林,杨庆山,等.近断层地震下可液化场地土反应的数值模拟[J].世界地震工程,2010,26(z):124-128.
[3]吴然,赵寿刚.激光粒度分析仪稳定性分析[J].黑龙江科技信息,2011(11):9-10.
[4]谭立新,余志明,蔡一湘.激光粒度法测试结果与库尔特法、沉降法的对比[C]∥中国颗粒学会第六届学术年会暨海峡两岸颗粒技术研讨会论文集.北京:中国颗粒学会,2008:76-79.
[5]李兰,石玉成.激光粒度分析仪测量黄土粉体粒度的应用研究[J].甘肃科学学报,2009,21(4):46-50.
[6]刘茜,郑西来,刘红军,等.黄河三角洲粉土液化的试验研究[J].世界地震工程,2007,23(2):161-166.
[2]张雪枫,刘林,杨庆山,等.近断层地震下可液化场地土反应的数值模拟[J].世界地震工程,2010,26(z):124-128.
[3]吴然,赵寿刚.激光粒度分析仪稳定性分析[J].黑龙江科技信息,2011(11):9-10.
[4]谭立新,余志明,蔡一湘.激光粒度法测试结果与库尔特法、沉降法的对比[C]∥中国颗粒学会第六届学术年会暨海峡两岸颗粒技术研讨会论文集.北京:中国颗粒学会,2008:76-79.
[5]李兰,石玉成.激光粒度分析仪测量黄土粉体粒度的应用研究[J].甘肃科学学报,2009,21(4):46-50.
[6]刘茜,郑西来,刘红军,等.黄河三角洲粉土液化的试验研究[J].世界地震工程,2007,23(2):161-166.
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