断层位错量对跨断层隧道的影响
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摘要
在几何相似比为100、断层倾角为90°的情况下,进行了断层位错量对跨断层隧道影响的模型试验。介绍了围岩模型材料的相似常数的选取及设计、隧道衬砌的设计、加载方案。对取得的衬砌应变数据进行处理分析。结果表明:不同位错量下隧道衬砌拱腰的纵向应变分布规律一致,隧道衬砌应变和位错量成正相关;破碎带两侧不同盘处的隧道衬砌的应变呈现反对称分布;应变最大位置处即在断层破碎带处。
Qualitative model test about the impact of displacement on the tunnel across the fault was carried out. The geometric similarity ratio was 100 and the fault dip angle was 90°,and the selection and design of similar constant about surrounding rock,the design of the tunnel lining and the loading program of the test were considered. Results showed that the longitudinal strain distribution of the hance in different amount of dislocation of tunnel lining was extremely similar,and the strain of the tunnel lining was closely relative to the dislocation. At different plates of the fracture zone on both sides of the tunnel lining,the distribution of strain was antisymmetric. The location of the biggest strain was near the fault fracture zone.
Qualitative model test about the impact of displacement on the tunnel across the fault was carried out. The geometric similarity ratio was 100 and the fault dip angle was 90°,and the selection and design of similar constant about surrounding rock,the design of the tunnel lining and the loading program of the test were considered. Results showed that the longitudinal strain distribution of the hance in different amount of dislocation of tunnel lining was extremely similar,and the strain of the tunnel lining was closely relative to the dislocation. At different plates of the fracture zone on both sides of the tunnel lining,the distribution of strain was antisymmetric. The location of the biggest strain was near the fault fracture zone.
引文
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[3]刘学增,谷雪影,代志萍,等.活断层错动位移下衬砌断面型式对隧道结构的影响[J].现代隧道技术,2014,51(5):71.
[4]李小军,赵雷,李亚琦.断层错动引发基岩上覆土层破裂过程模拟[J].岩石力学与工程学报,2009,28(增刊1):2703.
[5]王峥峥,高波,李斌,等.跨断层隧道振动台模型试验研究I:试验方案设计[J].现代隧道技术,2014,51(2):50.
[6]黄芸,蔡奇鹏,郭子雄,等.正断层错动致地铁变形计算模型[J].福州大学学报(自然科学版),2015(4):523.
[7]林克昌,陈新民,左娟花,等.断层宽度对跨断层隧道错动反应特性影响的数值模拟[J].南京工业大学学报(自然科学版),2013,35(3):61.
[8]赵颖,郭恩栋,刘智,等.走滑断层位错作用下城市地铁隧道损伤分析[J].岩土力学,2014,35(增刊2):60.
[9]何川,李林,张景,等.隧道穿越断层破碎带震害机理研究[J].岩土工程学报,2014,36(3):427.
[10]袁宗盼.跨断层隧道之错动响应及抗错断措施的数值模拟研究[D].南京:南京工业大学,2012:47.