泥炭质软土地区盾构隧道抗震性能研究
详细信息 本馆镜像全文    |  推荐本文 | | 获取馆网全文
摘要
文章采用ANSYS有限元分析软件,对土体与衬砌管片组成的耦合系统进行盾构隧道抗震三维有限元分析,其中考虑了土层的内摩擦角、内粘聚力。对不利于抗震的泥炭质土层采用多线性随动强化处理,使计算结果更加真实可靠。管片采用实体梁单元模拟,地震波选取汶川地震的地震动曲线。计算结果包括隧道周围土体的时程位移曲线、管片的轴力、剪力、弯矩等。最后从地震对盾构隧道的影响,对隧道抗震性能进行了初步评估,其结论可供昆明地区盾构隧道抗震设计参考。
The paper uses finite element analysis software ANSYS to conduct 3D finite element analysis on shield tunnel seismic coupling system composed of soil and lining segment, which takes into account the soil internal friction angle and cohesion force. To solve the problem of the seismic unfavorable peat soil, it uses multi-linear kinematic hardening treatment, and the result is more reliable and true. Segment uses solid beam element for simulation, and vibration curve selects the earthquake waves from Wenchuan Earthquake. The calculated results include the surrounding soil displacement curve, the axial force, shear and bending moment of the segment. With the study of earthquake impact on the shield tunnel, a preliminary evaluation has been carried out on the tunnel seismic resistance performance and behaviors. The paper makes conclusions which can be the reference for the seismic resistance design of shield tunnel in Kunming region.
引文
[1]小泉淳.盾构隧道的抗震研究及算例[M].北京:中国建筑工业出版社,2009.
    [2]刘如山,胡少卿,石宏彬.地下结构抗震计算中拟静力法的地震荷载施加方法研究[J].岩土工程学报,2007,29(2).
    [3]刘晶波,李彬.地铁地下结构抗震分析及设计中的几个关键问题[J].土木工程学报,2006,39(6).
    [4]陈磊,陈国兴,龙慧.地铁交叉隧道近场强地震反应特性的三维精细化非线性有限元分析[J].岩土力学,2010,31(12).
    [5]刘晶波,李彬,刘祥庆.地下结构抗震设计中的静力弹塑性分析方法[J].土木工程学报,2007,40(7).

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