新疆公格尔高温引水隧洞围岩温度场试验研究  

Filed test of temperature field of the surrounding rocks of high temperature in the Gonggerer diversion tunnel in Xinjiang

作　　者：姚显春[1,2] 李宁 余春海[3] 郭宇 YAO Xianchun;LI Ning;YU Chunhai;GUO Yu(Institute of Geotechnical Engineering,Xi’an University of Technology,Xi’an,Shaanxi 710048,China;State Key Laboratory Base of Eco-Hydraulic Engineering in Arid Area,Xi’an,Shaanxi 710048,China;Xinjiang Uygur Autonomous Region Institute of Water Resources and Electric Power Investigation and Design,Urumqi,Xinjiang 830000,China)

机构地区：[1]西安理工大学岩土工程研究所,陕西西安710048 [2]西北旱区生态水利国家重点实验室,陕西西安710048 [3]水利部新疆维吾尔自治区水利水电勘测设计研究院,新疆乌鲁木齐830000

出　　处：《水文地质工程地质》2018年第4期59-66,共8页Hydrogeology & Engineering Geology

基　　金：国家自然科学基金项目资助(50879068);陕西省教育厅基金项目资助(15JK1540)

摘　　要：为研究高岩温引水隧洞的温度场分布规律,本文依托新疆公格尔引水隧洞高岩温洞段,设置围岩温度监测试验洞,利用自研发的围岩温度监测仪,测试了试验洞在施工期、过水运行期及模拟检修期的围岩温度,得到了不同条件下的隧道围岩温度分布特征与规律。结果表明:引水隧洞高温段,离隧洞中心一定距离,围岩温度趋于稳定,随着围岩深度加深,此温度值不再发生变化。自围岩深部开始,靠近洞壁,岩体温度值按指数递减。隧洞开挖扰动对于岩体温度场的影响半径约为2倍的开挖洞径。在隧洞施工开挖完成后,围岩温度不会因为开挖的结束而变小,反而会由于隧洞支护结构(喷层、衬砌)施做的封闭,温度会进一步上升。对于新疆公格尔引水隧洞高温段围岩温度,进水前后,围岩温度差可按40℃计算,在排水后检修期围岩深浅部温度差可按25℃计算。In order to examine the distribution characteristics of temperature field of the high-geothermal diversion tunnel,this paper relies on the high-geothermal tunnel section of the Gonggeer diversion tunnel in Xinjiang and sets up a temperature monitoring test tunnel in the surrounding rocks.By using the self-designed surrounding rock temperature monitors,the surrounding rock temperature of the test tunnel during construction,operation and simulated overhaul period was tested.The temperature distribution characteristics of the tunnel surrounding rock under different conditions were obtained.The results show that the temperature of the surrounding rocks tends to be stable for a certain distance from the center of the tunnel in the high-geothermal section of the tunnel.With the deepening of the surrounding rocks,this temperature value no longer changes.From the deep part of the surrounding rocks of the tunnel wall and close to the tunnel wall,the temperature of the rock mass decreases exponentially.The influence distance of tunnel excavation disturbance on the temperature field of the rock mass is about twice the tunneling radius.After the excavation of the tunnel construction,the surrounding rock temperature will not be smaller due to the completion of excavation,but the temperature will further increase due to the closure made by the tunnel supporting structure(spray layer and lining).For the temperature of the surrounding rocks in the high temperature section of the Gonggerer diversion tunnel in Xinjiang,the temperature difference between the depth and tunnel wall of the surrounding rocks can be considered as 40℃.The temperature difference between the depth and the wall of the surrounding rocks during the overhaul can be considered as 25℃.

关 键 词：高岩温 引水隧洞 围岩 温度场 现场试验 

分 类 号：TU457[建筑科学—岩土工程]