水利水电技术2017，Vol.48Issue(7)：43-48,6.DOI:10.13928/j.cnki.wrahe.2017.07.007
高地温引水隧洞围岩热—应力耦合分析
Analysis on thermo-stress coupling of surrounding rock for water diversion tunnel under high ground temperature
摘要
Abstract
For a circular tunnel under the environment of high ground temperature in Xinjiang,the temperature distributions under the conditions of different radiuses of surrounding rock are respectively simulated,and then the temperatures under the conditions of different radiuses of the surrounding rock and at the supporting interfaces are taken as the references for selecting the values within the reasonable calculation range,while the optimal calculation radius of the surrounding rock is determined in combination with the result from the relevant theoretical analysis.On the basis of this,the distributions of the surrounding rock temperature,stress and displacement field under the effect of the thermo-stress coupling during the construction of the tunnel are further studied.The study result shows that when the external temperature of surrounding rock is 80 ℃ and the internal temperature of the tunnel is 5 ℃,the optimal calculation radius of the surrounding rock is 24 m under the consideration of the common effect from both the temperature and the stress after the excavation of the tunnel.Moreover,the tunnel surrounding rock temperature nonlinearly and incrementally changes along the direction of the thickness.Compared with the normal temperature (20 ℃) condition,the existence of high ground temperature can make the maximum principle stress of the surrounding rock decrease,and simultaneously can produce tensile stresses at both the vault and the bottom arch of the tunnel as well.关键词
高地温/引水隧洞/围岩/热—应力耦合Key words
high ground temperature/water division tunnel/surrounding rock/thermo-stress coupling分类
建筑与水利引用本文复制引用
后雄斌,姜海波,貊祖国..高地温引水隧洞围岩热—应力耦合分析[J].水利水电技术,2017,48(7):43-48,6.基金项目
国家自然科学基金项目(51408377) （51408377）
石河子大学杰出青年科技人才培育计划(2015ZRKXJQ06) （2015ZRKXJQ06）
