水利水电技术2017，Vol.48Issue(12)：78-81,145,5.DOI:10.13928/j.cnki.wrahe.2017.12.013
温度影响下水电站引水隧洞围岩参数试验研究
Experimental study on surrounding rock parameters of diversion tunnel for hydropower station under temperature effect
摘要
Abstract
In order to analyze the mechanisms of the temperature-dependent variations of the thermodynamic parameters of rock mass,the main thermodynamic parameters,such as thermal conductivity,specific heat,thermal expansion coefficient,elastic modulus,Poisson's ratio,etc.,of rock mass are measured through the relevant indoor test by taking the granite of a water diversion tunnel as the study objective,and then the variation mechanisms of them are analyzed as well.The study result shows that (1) the variation of the thermal conductivity of the granite presents a shape of parabolic line with the critical temperature of about 20 ℃,while the degree of the impact from lower temperature is larger than that of the higher temperature;(2) under the condition of the temperature variation,both the specific heat and the thermal expansion coefficient of the granite increase along with the increase of temperature with a better linear correlation;(3) in general,the elastic modulus of the granite negative-exponentially decreases along with the increase of temperature;(4) the Poisson's ratio of the granite increases along with the increase of temperature with a better linear correlation;(5) along with temperature variation,four effects are there on the rock mass,i.e.ice melting and evaporation effect,thermal expansion effect,mineral metamorphic effect and weakening effect of internal boding strength.关键词
围岩/温度变化/热力学参数/引水隧洞/水电站工程Key words
surrounding rock/temperature variation/thermodynamic parameters/diversion tunnel/hydropower project分类
建筑与水利引用本文复制引用
李亚坤,姜海波..温度影响下水电站引水隧洞围岩参数试验研究[J].水利水电技术,2017,48(12):78-81,145,5.基金项目
国家自然科学基金项目(51769031,51408377) （51769031,51408377）
石河子大学杰出青年科技人才培育计划(2015ZRKXJQ06) （2015ZRKXJQ06）
