隧道可液化场地围岩液化势评判及有限元分析

发布时间：2018-06-11 19:49

本文选题：圆形隧道 + 液化势指数　；参考：《沈阳建筑大学学报(自然科学版)》2017年03期

【摘要】：目的为对隧道围岩抗震性能进行准确有效评价,研究地震作用下可液化地基震动液化对地下隧道震害规律影响.方法基于总应力法对隧道可液化围岩进行液化势的判别和有限元分析,采用NCEER建议的动剪应力液化判别简化方法,分析隧道尺寸、衬砌厚度、隧道埋深及剪切波速对可液化围岩震动液化势的影响.结果改变隧道尺寸和衬砌厚度对土体加速度影响不大,而隧道埋深对土体液化势指数影响较大,增大隧道埋深则围岩不易发生液化.结论可液化场地隧道建设时应考虑增大埋深从而减小土体液化后产生的破坏.
[Abstract]:The purpose is to evaluate the seismic performance of tunnel surrounding rock accurately and effectively, to study the effect of liquefaction of liquefiable foundation on the earthquake damage law of underground tunnel under earthquake action. Method based on the total stress method to discriminate the liquefaction potential of tunnel liquefiable surrounding rock and the finite element analysis, and analyze the simplified method of dynamic shear stress liquefaction suggested by NCEER. The influence of tunnel size, lining thickness, buried depth of tunnel and shear wave velocity on liquefiable potential of liquefiable surrounding rock. Results the influence of tunnel size and lining thickness on soil acceleration is little, and the depth of tunnel has great influence on soil liquefaction potential index, and the tunnel depth is not easy to liquefaction. Conclusion the construction of tunnel construction in liquefiable site We should consider increasing the burial depth so as to reduce the damage caused by liquefaction.
【作者单位】：大连海事大学土木工程系;北京工业大学建筑工程学院;
【基金】：国家自然科学基金面上项目(51578100) 辽宁省教育厅一般项目(L2013305) 北京市博士后基金(2014ZZ-49)
【分类号】：U451.2

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