云母片岩隧道二衬开裂特征数值计算研究

发布时间：2018-05-07 03:30

本文选题：云母片岩 + 公路隧道　；参考：《公路》2017年02期

【摘要】：隧道工程在穿越不良工程地质区域时易诱发各类不良工程灾害问题,其中隧道二衬结构开裂作为其中典型工程问题对隧道施工及运营安全有着重要影响。研究区隧道处于云母片岩地层覆盖区域,在施工过程中多条隧道曾出现过二衬开裂问题,严重威胁隧道施工安全。为有效控制和预防二衬开裂问题,结合谷竹高速公路工程实例,通过现场调研、病害检测及数值计算相结合的方法,对二衬开裂类型、特征及成因进行了分析,结合研究分析结果对偏压、空洞、不均匀沉降等影响因素作用下的二衬开裂特征进行了数值计算,揭示不同成因下二衬结构开裂特征及规律,研究成果为确保谷竹高速公路片岩隧道及类似工程施工的安全及运营提供参考依据。
[Abstract]:Tunnel engineering is prone to cause various kinds of bad engineering disasters when crossing the bad engineering geological area. As a typical engineering problem, tunnel second lining cracking has an important impact on tunnel construction and operation safety. The tunnel in the study area is covered by mica schist strata. In the process of construction, there have been two lining cracking problems in many tunnels, which seriously threaten the safety of tunnel construction. In order to effectively control and prevent the cracking of the second lining, combining with the engineering example of Guzhu Expressway, through the method of field investigation, disease detection and numerical calculation, the types, characteristics and causes of the cracking of the second lining are analyzed. Combined with the results of research and analysis, the cracking characteristics of two-liner structure under the action of bias voltage, cavity, uneven settlement and other factors are numerically calculated, and the cracking characteristics and laws of two-liner structure under different causes are revealed. The research results provide a reference for ensuring the safety and operation of the schist tunnel and similar projects in Guzhu Expressway.
【作者单位】：江西省公路开发总公司;江西省交通科学研究院;
【基金】：江西省交通厅科技项目,项目编号2015C0020;江西省交通厅科技项目,项目编号2015C0015;江西省交通厅科技项目,项目编号2015C0016;江西省交通厅科技项目,项目编号2015C0017;江西省交通厅科技项目,项目编号2015C0019
【分类号】：U455.91

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