发电引水隧洞高地温洞段施工降温技术

Cooling technology for construction of high earth temperature section of a diversion tunnel

新疆公格尔—布仑口水电站发电引水隧洞高地温洞段实测掌子面最高环境温度67℃、钻孔内最高温度82℃,为国内罕见的高地温条件下的水工隧洞工程,本文分析了高地温产生的原因,简要介绍了国内外高地温隧洞(隧道)工程现状及应对措施,并着重阐述了高地温隧洞以通风为主、辅助低温冷水综合降温技术,可供类似工程参考。

The measured environmental temperature of the excavation face at the high earth temperature section of the diversion tunnel for Kongur-Bulungkol Hydropower Station in Xinjiang is 67 ℃ with the highest temperature insider of the drilling hole is even to be 82 ℃ ; which is really a tunneling project constructed under an unusual high earth temperature in China. The causation of the high earth temperature therein is analyzed herein, and then the status and the relevant countermeasures for the tunneling projects constructed under such a condition of high earth temperature at home and abroad are briefly introduced, furthermore, the comprehensive cooling technology mainly consisting of ventilation supplemented with lower temperature cooling water is also emphatically expatiated; which can be provide a reference for the similar projects concerned.