某高速公路隧道2次衬砌厚度不足病害整治

发布时间：2018-01-09 13:14

本文关键词：某高速公路隧道2次衬砌厚度不足病害整治　出处：《武汉大学学报(工学版)》2017年06期 　论文类型：期刊论文

【摘要】：2次衬砌厚度不足病害直接降低隧道结构的可靠度.以某高速公路隧道为研究对象,从纵向里程变化和横断面不同位置2个方面对2次衬砌厚度不足病害进行统计分析,将左线和右线2次衬砌厚度不足病害对比分析整治,采用数值分析软件对整治前后衬砌结构受力进行数值模拟以验证整治效率,以期能够为类似隧道2次衬砌厚度不足病害整治提供借鉴.结果如下:1)在横断面位置上,拱顶处2次衬砌厚度不足病害最严重;在纵向里程上,左线拱腰处ZK21+575~600、ZK21+700~725段,边墙处ZK21+750~800段,右线拱腰处K21+800~875段2次衬砌厚度不足病害相对严重,建议加强衬砌健康状况检测;2)得到2次衬砌厚度不足病害整治前后衬砌结构的内力及安全系数变化,整治后衬砌结构的承载力和稳定性明显增强,拱腰和墙脚处安全系数显著增大,十分利于塑性区域明显集中的坑道侧壁的受力,证明整治措施有效.
[Abstract]:The failure of lining thickness twice directly reduces the reliability of tunnel structure. A highway tunnel is taken as the research object. From two aspects of longitudinal mileage variation and cross-section different position, the defects of insufficient lining thickness twice are statistically analyzed, and the defects of insufficient lining thickness in left line and right line are compared and remedied. Numerical analysis software is used to simulate the stress of lining structure before and after regulation to verify the regulation efficiency. The results are as follows: (1) in the cross section position, the defect of the second lining thickness at the arch top is the most serious; In the longitudinal mileage, the ZK21 575ZK2700 ~ 725 segment at the left arch waist and the ZK21 750 ~ 800 section at the side wall. The disease of insufficient lining thickness is relatively serious in section K21800-875 of right line arch, so it is suggested to strengthen the inspection of lining health condition. 2) the internal force and safety factor of the lining before and after treatment were obtained. After the treatment, the bearing capacity and stability of the lining structure were obviously enhanced, and the safety factor of the arch waist and the foot of the wall was significantly increased. It is very favorable to the stress on the lateral wall of the tunnel which is obviously concentrated in the plastic area, which proves that the treatment measures are effective.
【作者单位】：四川省冶金地质勘查局水文工程大队;云南省交通规划设计研究院;西南交通大学交通隧道工程教育部重点实验室;
【分类号】：U455.91
【正文快照】： merical simulation;change of internal force and safety factor of lining近年来我国高速公路建设取得长足发展,高速公路隧道的数量和里程相应增加[1],相继出现了秦岭终南山公路隧道、宝天高速公路麦积山特长隧道、太古高速公路西山特长隧道等国内外著名高速公路隧道.然而,

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