川藏铁路二郎山深埋隧道的地应力场反演分析
详细信息 本馆镜像全文    |  推荐本文 | | 获取馆网全文
摘要
二郎山隧道是川藏铁路的控制性重点工程,隧址区的地应力分析对于铁路的选线和施工具有重要意义。本文通过工程类比分析和应力计算确定了边界条件及水平向对称梯度应力,综合应用CAD,ANSYS和FLAC3D三种软件开展了二郎山隧道深埋方案的数值反演,分析了沿隧道轴线的应力变化和分布特征。结果表明:隧址区全长范围内最大主应力总体上随埋深增大而逐渐增加;局部应力状态受地质构造影响较大,在结构面及岩性分界点附近有明显变化。
Erlang mountain tunnel is the controlling key project of Sichuan-Tibet railway. Ground stress analysis of the tunnel site area has important significance to the railway route selection and construction. This paper determined the boundary conditions and the horizontal symmetry gradient stress by engineering analogy analysis and ground stress calculation,developed numerical inversion model for deep buried scheme of Erlang mountain tunnel by combining with CAD,ANSYS and FLAC3 D,analyzed stress change and distribution characteristics along the tunnel axis. The results showed that the maximum principle stress gradually increases with the growth of the cover depth in tunnel site area,local stress state is mainly affected by geological structure,which obviously changes nearby the structural plane and lithology boundary point.
引文
[1]徐正,李天斌,孟陆波,等.鹧鸪山隧道地应力反演模型与三维地应力[J].成都理工大学学报(自然科学版),2014,41(2):243-250.
    [2]王连捷,潘立宙.地应力测量及其在工程中的应用[M].北京:地震出版社,1991.
    [3]李青麟.初始应力的回归与三维拟合[J].岩土工程学报,1998,20(5):68-71.
    [4]张良刚,吴立,徐昌茂,等.高速铁路大断面隧道地应力测试与分析[J].铁道建筑,2012(9):50-53.
    [5]汪波,何川,吴德兴,等.苍岭特长公路隧道地应力场反演分析[J].岩土力学,2012,33(2):629-634.
    [6]姚显春,李宁,曲星,等.拉西瓦水电站地下厂房三维高地应力反演分析[J].岩土力学,2010,31(1):246-252.
    [7]郭运华,朱维申,李新平,等.基于FLAC3D改进的初始地应力场回归方法[J].岩土工程学报,2014,32(5):1-7.
    [8]李永松,尹健民,陈建平,等.基于模拟退火和粒子群混合算法的地应力场分析[J].人民长江,2011,42(23):65-67.
    [9]陈华根,吴健生,王家林,等.模拟退火算法机理研究[J].同济大学学报(自然科学版),2004,32(6):802-805.
    [10]石敦敦,傅永华,朱暾,等.人工神经网络结合遗传算法反演岩体初始地应力的研究[J].武汉大学学报(工学版),2005,38(2):73-76.
    [11]夏彬伟,李晓红,韩昌瑞,等.深埋隧道层状岩体地应力反演研究[J].水文地质工程地质,2009(4):75-79.

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