岩石力学与工程学报
巖石力學與工程學報
암석역학여공정학보
CHINESE JOURNAL OF ROCK MECHANICS AND ENGINEERING
2013年
z2期
3396-3403
,共8页
侯代平%刘乃飞%余春海%李宁
侯代平%劉迺飛%餘春海%李寧
후대평%류내비%여춘해%리저
隧道工程%高温隧洞成因分析%降温措施%高温差下支护设计
隧道工程%高溫隧洞成因分析%降溫措施%高溫差下支護設計
수도공정%고온수동성인분석%강온조시%고온차하지호설계
tunnelling engineering%reasons analysis in high temperature tunnel%cooling measures%lining design in high temperature difference conditions
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。
結閤新疆佈崙口-公格爾水電站工程引水髮電洞存在的高地溫問題展開研究,首先根據相關地質資料和研究成果對該工程高地溫成因和機製進行分析探討,認為高地溫是地質結構的不均勻性引起熱流密度嚮熱阻小的跼部區域(石墨夾層帶)集中的結果。隨後研究高溫條件下的施工措施,推薦彊通風降溫措施,併輔以低溫冷水噴霧降溫技術。通過比較分析建議高溫差洞段支護結構的形式與方案,即採用防火耐熱噴層,或纖維混凝土噴層替代常規襯砌方案。研究成果以期對同類工程的設計和施工提供參攷和藉鑒。
결합신강포륜구-공격이수전참공정인수발전동존재적고지온문제전개연구,수선근거상관지질자료화연구성과대해공정고지온성인화궤제진행분석탐토,인위고지온시지질결구적불균균성인기열류밀도향열조소적국부구역(석묵협층대)집중적결과。수후연구고온조건하적시공조시,추천강통풍강온조시,병보이저온랭수분무강온기술。통과비교분석건의고온차동단지호결구적형식여방안,즉채용방화내열분층,혹섬유혼응토분층체대상규츤체방안。연구성과이기대동류공정적설계화시공제공삼고화차감。
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.