高地温隧道地温特征及预测研究  

Study on Ground Temperature Characteristics and Prediction of High Ground Temperature Tunnel

作　　者：胡政 郭维祥 王平易 刘金洋 田茂中 Hu Zheng;Guo Weixiang;Wang Pingyi;Liu Jinyang;Tian Maozhong(Power China Guiyang Engineering Co.,Ltd.,Guiyang 550081,P.R.China;Guizhou BIM Engineering and Technology Research Center,Guiyang 550081,P.R.China)

机构地区：[1]中国电建集团贵阳勘测设计研究院有限公司,贵阳550081 [2]贵州省建筑信息模型(BIM)工程技术研究中心,贵阳550081

出　　处：《地下空间与工程学报》2021年第6期1906-1915,共10页Chinese Journal of Underground Space and Engineering

基　　金：贵州省科技计划项目(黔科合平台人才[2019]5301号)。

摘　　要：尼格隧道属长大深埋隧道,兼有高水温与高岩温,最高水温达63.4℃,最高岩温达88.8℃,最高气温达56.4℃。为了研究隧道地温特征并进行地温预测,针对性地设计了一系列地温测量方案,研究成果表明:灰岩段表现为高水温,水温>气温>岩温,水温与气温随着隧道进深及埋深呈现上升趋势,出水量及水温在接触带附近达到高值,洞内气温受水温、隧道出水量、积水量影响大;花岗岩段表现为高岩温,无水,岩温与气温随隧道进深及埋深呈现上升趋势,两者差值约为25~30℃;超前钻孔在孔深>2 m时岩温达到稳定;一个完整施工循环的施工环境气温呈现4个阶段:气温下降阶段(打钻施工环节),气温骤升阶段(爆破施工环节),气温快速上升阶段(新爆围岩散热),气温缓降阶段(出渣施工环节),出渣环节由于车辆及挖机等机械作业影响,气温出现多处异常高值;施作二衬后,二衬内外壁温差约3.4℃;利用热量传递理论、地热成因理论预测的最高地温值与实测值较为吻合。该工程案例颇为典型,本文研究对西南高地热区隧道工程建设具有指导意义。Nige tunnel is a long and deep buried tunnel with high water temperature and high rock temperature.The highest water temperature is 63.4℃,the highest rock temperature is 88.8℃,and the highest temperature is 56.4℃.In order to study the characteristics of tunnel ground temperature and predict the ground temperature,a series of ground temperature schemes were designed.The research results show that the limestone section is characterized by high water temperature,water temperature>air temperature>rock temperature.The water temperature and air temperature increase with the tunnel depth and buried depth,and the water yield and water temperature reach high values near the contact zone.The temperature in the tunnel is affected by water temperature,tunnel water yield and water volume The results show that the granite section is characterized by high rock temperature and no water,and the rock temperature and air temperature increase with the depth and depth of the tunnel,and the difference between them is about 25℃~30℃;the rock temperature reaches stability when the hole depth is more than 2 m;the construction environment temperature of a complete construction cycle presents four stages:the temperature drop stage(drilling construction link),the temperature rise stage(blasting construction link),In the stage of rapid rise of temperature(heat dissipation of newly exploded surrounding rock)and slow decrease of air temperature(slagging construction),due to the influence of mechanical operation such as vehicles and excavators,there are many abnormal high values of air temperature in the slag discharging process;after the construction of secondary lining,the temperature difference between the inner and outer walls of the second lining is about 3.4℃;the maximum ground temperature predicted by the heat transfer theory and geothermal Genesis theory is consistent with the measured value.The project case is quite typical,and the research in this paper has guiding significance for tunnel construction in southwest highland

关 键 词：高水温 高岩温 气温 地温测量 地温预测 

分 类 号：U456.3[建筑科学—桥梁与隧道工程]