复杂地质条件下盾构隧道地震响应分析

发布时间：2018-06-06 07:55

  本文选题：盾构隧道 + 地震响应　； 参考：《山东农业大学学报(自然科学版)》2014年01期

【摘要】：复杂地质条件下盾构隧道地震响应问题已成为当前工程界研究的重点,其研究涉及盾构施工过程中的土-水-结构的相互作用及地震作用下土体液化、结构破坏等多方面。以数值分析方法模拟完全渗流-应力耦合情况下盾构隧道施工、固结过程;随后采用非线性动力-渗流应力耦合分析方法计算盾构隧道的地震响应,据此分析其安全性。该方法应用于天津地铁隧道某段工程,研究复杂地质条件下盾构隧道的地震响应。研究结果表明:在Ⅷ度地震作用下,该隧道各土层不会发生液化;衬砌应力变化幅度不大,拉、压应力均远小于混凝土抗拉、抗压强度,是安全的;地震对隧道洞径影响不大;地表横向相对位移较大,而竖向相对位移很小,这表明横向地震更容易导致盾构隧道损害。
[Abstract]:The seismic response of shield tunnel under complex geological conditions has become the focus of the engineering field. The research involves the soil-water structure interaction in shield tunneling process and the soil liquefaction and structure failure under seismic action and so on. The numerical analysis method is used to simulate the construction and consolidation process of shield tunnel under the condition of complete seepage and stress coupling, and then the nonlinear dynamic and seepage stress coupling analysis method is used to calculate the seismic response of shield tunnel, and the safety of shield tunnel is analyzed accordingly. The method is applied to a section of Tianjin subway tunnel to study the seismic response of shield tunnel under complex geological conditions. The results show that under the earthquake of 鈪，

本文编号：1985816