黄土围岩隧道结构的多场耦合地震响应及动力稳定分析

项目名称： 黄土围岩隧道结构的多场耦合地震响应及动力稳定分析

项目编号： No.51478212

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 建筑科学

项目作者： 程选生

作者单位： 兰州理工大学

项目金额： 82万元

中文摘要： 随着工程建设的迅速发展和西部大开发的不断深入，黄土围岩隧道已成为土体围岩隧道的重要组成部分。现有文献虽对黄土围岩隧道的抗、减震研究有一定的基础，但对地震、渗流、应力和变形耦合作用下黄土围岩隧道的动力响应和动力稳定研究尚未见相关报导，故本项目通过理论分析、数值仿真、现场实验和振动台模型试验相结合的方法，拟针对Q2和Q3黄土隧道，考虑浅埋和深埋两种情况，进行断面型式的优化、多场耦合地震响应和动力稳定分析、多场耦合动力试验等方面的研究，修正已获得的动力有限元强度折减法和动力有限元静力强度折减法，确定多场耦合情况下的最优断面型式，提出地震、渗流、应力和变形耦合作用下黄土围岩隧道结构动力响应和动力稳定分析的本构关系和分析模型，揭示地震-应力、地震-渗流、地震-变形、地震-应力-渗流、地震-应力-变形、地震-应力-渗流-变形作用下的耦合响应规律和稳定规律，从而为以后黄土隧道结构的设计计算提供参考。

中文关键词： 黄土；隧道结构；多场耦合；地震响应；动力稳定

英文摘要： With the rapid development of engineering construction and the great western development, loess tunnel has become an important part of the soil tunnel. There has been a certain foundation about the anti-seismic and shock absorption of loess tunnel in the existing literature, but the study about the dynamic response and dynamic stability of loess tunnel has not been reported under coupling action of earthquake, seepage, stress and displacement, so through theoretical analysis, numerical simulation, field test and shaking table model test, aiming at Q2 and Q3 loess tunnel and considering two cases that are shallow buried tunnel and deep buried tunnel, section configuration optimization, seismic response and dynamic stability, dynamic testing and so on under multifield coupling are proceeded. The acquired dynamic finite element strength reduction method and dynamic finite element static strength method is revised, the optimal section type in the case of multi field coupling is determined, the constitutive relation and the analysis model of dynamic response and dynamic stability about loess tunnel structure under the coupling action of earthquake, seepage, stress and displacement is put forward, the response rule and stable rule under the action of earthquake-stress, earthquake-seepage, earthquake-displacement, earthquake-stress-seepage, earthquake-stress-displacement, and earthquake-stress-seepage-displacement are revealed, thus the reference about the design and calculation of loess tunnel is provided in the future.

英文关键词： loess;tunnel;multifield coupling;seismic response;dynamic stability