摘要
结合新疆布仑口—公格尔水电站工程引水发电洞存在的高地温问题展开研究,首先根据相关地质资料和研究成果对该工程高地温成因和机制进行分析探讨,认为高地温是地质结构的不均匀性引起热流密度向热阻小的局部区域(石墨夹层带)集中的结果。随后研究高温条件下的施工措施,推荐强通风降温措施,并辅以低温冷水喷雾降温技术。通过比较分析建议高温差洞段支护结构的形式与方案,即采用防火耐热喷层,或纤维混凝土喷层替代常规衬砌方案。研究成果以期对同类工程的设计和施工提供参考和借鉴。
Due to the high geothermal problems in the rock tunnel of Bulunkou-Gongur hydropower station in Xinjiang,investigations about thermal-stress induced by high temperature is performed firstly;and the reasons of the high temperature in the rock mass around this project are also discussed. It′s found that the heterogeneity of geological formations causes heat flux density to concentrate in the low thermal resistance part,i.e. graphite interlayer,which induceds the high temperature around the tunnel in the rock mass of graphite interlayer. Secondly,construction measures in high temperature are studied,and the ventilation method is reconnended, which is assisted by the spray technology using low temperature water. The support scheme is also suggested for the similar tunnel in the high temperature variation,i.e. using fire and heat-resistant concrete spray or fiber reinforced concrete spray to replace the ordinary concrete lining.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2013年第S2期3396-3403,共8页
Chinese Journal of Rock Mechanics and Engineering
基金
国家自然科学基金资助项目(51179153)
国家自然科学基金创新群体项目(40821001)
中国科学院冻土工程国家重点实验室项目(SKLFSE–ZY–03)
关键词
隧道工程
高温隧洞成因分析
降温措施
高温差下支护设计
tunnelling engineering
reasons analysis in high temperature tunnel
cooling measures
lining design in high temperature difference conditions
