高岩温铁路隧道支护结构体系分级研究

发布时间：2018-05-02 09:24

  本文选题：高岩温 + 铁路隧道　； 参考：《土木工程学报》2015年11期

【摘要】：通过热-应力耦合数值模拟,研究了高岩温铁路隧道初期支护和二次衬砌在不同岩温下的安全性;通过室内试验测试了铁路隧道常用防水材料及两种新型防水材料的高温性能;通过有限元数值模拟比选了高岩温铁路隧道新型的支护结构体系。在以上研究基础之上,对高岩温铁路隧道支护结构体系进行了分级。结果表明:高岩温铁路隧道支护结构体系可以分为四级。当岩温小于45℃时,支护结构体系采用标准设计;当岩温为45~60℃时,初期支护需特殊设计,需选用新型防水材料;当岩温为60~80℃时,初期支护和防水材料需特殊设计,二次衬砌需配筋设计;当岩温大于80℃时,支护结构体系需特殊设计。
[Abstract]:Through thermal-stress coupling numerical simulation, the safety of initial support and secondary lining of railway tunnel at different rock temperatures is studied, and the high temperature performance of common waterproof materials and two new waterproof materials in railway tunnel are tested through laboratory tests. Through finite element numerical simulation, the new support structure system of high-temperature railway tunnel is compared. On the basis of the above research, the supporting structure system of high-temperature railway tunnel is classified. The results show that the supporting structure system of high-temperature railway tunnel can be divided into four levels. When the rock temperature is less than 45 鈩，

本文编号：1833317