摘要
研究目的:强震区高岩温隧道的结构安全性及稳定性是当前亟待研究和解决的热点问题之一。为降低高岩温隧道支护结构的服役温度并提高其震时安全性,本文以拉日铁路吉沃希嘎隧道为研究背景,通过采用有限差分数值模拟技术,对强震区高岩温隧道的阻热抗震技术进行研究。研究结论:(1)探明了隧道采用围岩注浆的最佳阻热方案,即注浆厚度为3 m、注浆区与初支的间距为0 m的接触注浆;(2)探明了隧道采用围岩注浆的最佳抗震方案,即注浆厚度为3 m、注浆区与初支的间距为0.5 m的间隔注浆;(3)从支护结构的阻热效果和抗震效果两个方面综合考虑,强震区高岩温隧道建议采用围岩注浆最佳抗震方案进行阻热抗震设防设计;(4)该研究成果可为强震区高岩温隧道阻热抗震技术的发展提供借鉴。
Research purposes： Structural safety and stability of high rock temperature tunnel in meizoseismal area is one of the hot issues that need to be studied and solved urgently. In order to reduce the service temperature of the support structure of high rock temperature tunnel and improve its safety at the time of earthquake, taking Jiwoxiga tunnel on Lasa - Shigatse railway as the research background, this paper studies the heat resistant and anti - seismic technology of high rock temperature tunnel in meizoseismal area by using finite difference numerical simulation technique. Research conclusions： （ 1 ） It proves that he best heat resistance scheme of tunnel rock grouting, that is, the grouting thickness is 3 m, the grouting area and the initial branch spacing are 0 m contact grouting. （2）It proves that the tunnel is the best anti - seismic scheme for the use of surrounding rock grouting, that is, the grouting thickness is 3 m, the interval between the grouting area and the initial branch is0.5 m. （3）Considering the heat -resisting effect and the anti - seismic effect of the supporting structure, the high -temperature tunnel in meizoseismal area is recommended to use the best anti -seismic scheme of surrounding rock grouting to design it. （4）The research results can provide reference for the development of the heat resistant and anti - seismic technology of high rock temperature tunnel in meizoseismal area.
出处
《铁道工程学报》
EI
北大核心
2017年第9期83-87,102,共6页
Journal of Railway Engineering Society
基金
国家自然科学基金项目(51408008
51478277)
四川省应用基础研究计划项目(2014JY0090
2015JY0166)
四川省交通科技项目(2013A1-5)
关键词
隧道工程
强震区
高岩温
阻热
抗震
tunnel engineering
meizoseismal area
high rock temperature
heat resistant
anti - seismic
