P波作用下饱和土中深埋圆形复合式衬砌隧道动应力响应研究  

Dynamic response of deep circular composite-lined tunnel in saturated soil subjected to incident plane P-waves

作　　者：丁海滨[1] 徐长节[1,2] 童立红 杨园野 郭生根 DING Hai-bin;XU Chang-jie;TONG Li-hong;YANG Yuan-ye;GUO Sheng-geng(Jiangxi Key Laboratory of Infrastructure Safety Control in Geotechnical Engineering, East China Jiaotong University,Nanchang 330013,China;Research Center of Coastal and Urban Geotechnical Engineering,Zhejiang University,Hangzhou 310058,China;Jiangxi Harbor and Navigation Administration,Nanchang 330000,China)

机构地区：[1]华东交通大学,江西省岩土工程基础设施安全与控制重点实验室,南昌330013 [2]浙江大学滨海和城市岩土工程研究中心,杭州310058 [3]江西省港航管理局,南昌330000

出　　处：《计算力学学报》2018年第5期589-596,共8页Chinese Journal of Computational Mechanics

基　　金：国家重点基础研究发展计划(973计划)(2015CB057801)；江西省岩土工程基础设施安全与控制重点实验室(20161BCD40002)；江西省青年科学基金(20171BAB216047)资助项目.

摘　　要：采用波函数展开法,推导出了平面P波入射下饱和土中深埋圆形双层衬砌动应力集中问题的解析解,并将该解退化为弹性介质中双层衬砌对平面P波散射的稳态解,验证了计算结果的正确性。研究结果表明,饱和土中双层衬砌的内边界动应力集中系数值大于外边界;外侧衬砌及内侧衬砌弹性模量对衬砌的动应力集中系数影响较大,在保证外侧衬砌稳定性较好的条件下,内侧衬砌尽可能选择刚度较小的材料;增加外侧衬砌及内侧衬砌的厚度可明显地减小衬砌内的动应力集中系数。Based on wave function expansion method,an analytical solution for dynamic stress concentration of circular tunnel with double-layer-liner in saturated soil under incident plane P-waves is derived.The solutions are verified by degenerating the studied of saturated soil medium into elastic medium.According to the solutions,the internal dynamic stress concentration factor is larger than the dynamic stress concentration factor at the outer boundary of double-layer liner in saturated soil.The elastic modulus of the outer lining and the inner lining affect the dynamic stress concentration factor of the lining greatly.The material of inside lining with lest rigidity should be chosen,under the condition of the outer lining stability.Increasing the thickness of the outer lining and the inner lining could reduce the dynamic stress concentration factor of the lining obviously.

关 键 词：双层衬砌 饱和土 圆形衬砌 动应力集中系数 

分 类 号：TU352.1[建筑科学—结构工程] O313[理学—一般力学与力学基础]