| 喀喇-昆仑山区引水发电洞高地温现象及成因探讨 |
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| 引用本文： | 赵国斌,徐学勇,刘顺萍.喀喇-昆仑山区引水发电洞高地温现象及成因探讨[J].工程地质学报(英文版),2015,23(6):1196-1201. |
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| 作者姓名： | 赵国斌 徐学勇 刘顺萍 |
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| 作者单位： | 1.中国电建集团华东勘测设计研究院有限公司 杭州 310014; |
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| 摘 要： | 地热资源作为一种可再生的清洁能源已经得到广泛的应用,然而往往由于地热资源的存在,对地下工程的设计与施工带来一些麻烦;国内外已有很多工程遇到了高地温问题,其中极具代表性的为地处喀喇-昆仑山区的布伦口-公格尔水电站引水发电洞和齐热哈塔尔水电站引水发电洞。本文介绍了两条引水发电洞施工过程中遇到的高地温现象,如洞壁岩体温度最高分别达到97℃和119℃,沿裂隙喷出蒸汽温度最高分别达到140℃和174℃;持续高温洞段长度分别为4km和3.5km,其中齐热哈塔尔水电站引水发电洞洞壁岩体温度超过90℃的洞段长度超过900m。论文从区域构造环境、地热资源赋存特征、不良的地下水循环条件以及导热体的存在等4个方面分析了该区域内地下工程高地温现象的成因;进一步提出了地热资源赋存区域地下工程勘察过程中应注意的问题。本文从国内外地下工程施工过程中遭遇的罕见高地温现象研究出发,认为活跃的区域构造环境与高的区域热流背景值是导致喀喇-昆仑山区地下工程施工过程中遭遇高地温现象的本质原因。
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| 关 键 词： | 喀喇-昆仑山区 引水发电洞 高地温现象 构造活跃区 区域热流背景值 |
| 收稿时间： | 2014-10-08 |
PHENOMENON AND CAUSE OF HIGH GEO-TEMPERATURE OF HYDRO-ELECTRIC POWER DIVERSION TUNNEL IN KALA-KUNLUN MOUNTAIN |
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| Institution: | 1.PowerChina Huadong Engineering Corporation Limited, Hangzhou 310014;2.China Water Resources Beifang Investigation Design and Research Com. Ltd., Tianjin 300222 |
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| Abstract: | Geothermal resources is one kind of clean and renewable energy which has been used widely. But, designing and building of underground engineering become more difficulty in the area of geothermal resources, because geothermal resources can lead to high geo-temperature phenomenon of engineering geological problem. This problem has been encountered during construction of many underground engineering at home and abroad. Of these engineering, Bulunkou-Gonggeer hydroelectric power diversion tunnel and Qirehater hydroelectric power diversion tunnel located on Kala-Kunlun Mountain of Pamirs can be as typical engineering. During construction of Bulunkou-Gonggeer hydroelectric power diversion tunnel, the highest temperature of wall rock mass of tunnel is 97℃, and the highest temperature of steam water ejecting from joints and fissures is 140℃,the length of high geo-temperature tunnel is 4km. As for as Qirehater hydroelectric power diversion tunnel is concerned, the highest temperature of wall rock mass of tunnel is 119℃, and the highest temperature of steam water ejecting from joints and fissures is 174℃,the length of high geo-temperature tunnel is 3.5km. The length of tunnel whose temperature wall rock mass of tunnel exceeds 90℃is larger than 900m. High geo-temperature problem of the two tunnels is uncommon in the field of underground engineering. In this paper, cause of high geo-temperature of underground engineering in this area is talked about, authors consider that the main causes include activity regional structure, high regional heat flow background value, good rock conditions, poor underground water cyclic conditions, thermal conductivity rock mass or joint and small fault. Based on above discussion, authors consider that in the investigation stage of underground engineering, it is necessary to done that regional geothermal environment survey, thermal spring survey and geothermal parameters testing for those engineering which may encounter high geo-temperature during the period of designing and building. In this paper, author study high geo-temperature phenomenon which is one kind of uncommon and special geological problem during construction of underground engineering in home and abroad, activity regional structural environment and high regional heat flow background value are the essential reasons which lead to high geo-temperature phenomenon of underground engineering. |
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