海底隧道二次衬砌承载力试验及安全性评价

发布时间：2018-05-03 07:47

本文选题：海底隧道 + 二次衬砌　；参考：《地下空间与工程学报》2015年03期

【摘要】：海底隧道长达100年的使用寿命中,由于种种原因,可能使二次衬砌承担荷载逐渐增大,最终导致其破坏。为模拟二次衬砌这一受力过程,进行了海底隧道7种二次衬砌类型的承载力模型试验。通过试验分析,在荷载增大过程中,二次衬砌裂缝发生、发展规律和位移、内力变化规律,得到二次衬砌裂缝承载力和极限承载力。将试验数据与二次衬砌内力和承担荷载的长期监测数据比较,评价二次衬砌的安全性。研究表明:二次衬砌产生裂缝的顺序依次是仰拱、墙角、边墙、拱部;7种二次衬砌类型具有较高承载力,尤其是S5d型;二次衬砌内力及承受荷载监测数据远小于试验数据,二次衬砌具有较高安全储备。
[Abstract]:During the service life of the tunnel for up to 100 years, the secondary lining load may increase gradually due to various reasons, and eventually lead to its destruction. In order to simulate the stress process of secondary lining, the bearing capacity model tests of 7 secondary lining types of subsea tunnel were carried out. Through the test and analysis, the secondary lining crack occurred, the development law, the displacement and the internal force change law in the course of the load increase, and the bearing capacity and the ultimate bearing capacity of the secondary lining crack were obtained. The safety of the secondary lining is evaluated by comparing the test data with the long-term monitoring data of the internal force and bearing load of the secondary lining. The results show that the secondary lining has high bearing capacity, especially S5d, and the monitoring data of the internal force and bearing load of the secondary lining are much smaller than the test data, and the order of the secondary lining cracks is invert, corner, side wall and arch, and the secondary lining has a high bearing capacity, especially the S5d type, and the monitoring data of the secondary lining internal force and bearing load are much smaller than the test data. Secondary lining has high safety reserve.
【作者单位】：西南交通大学峨眉校区土木工程系;西南交通大学交通隧道工程教育部重点实验室土木工程学院;铁道第三勘察设计院集团有限公司;中国中铁二院工程集团有限责任公司;
【基金】：国家自然科学基金资助项目(51208434) 中央高校基本科研业务费专项资金资助项目(2682013CX005EM)
【分类号】：U455.91

【参考文献】