Construction of a Long Water Diversion Tunnel under High Geo-thermal Temperature Conditions

›› 2014, Vol. 28 ›› Issue (4): 44-47.

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Construction of a Long Water Diversion Tunnel under High Geo-thermal Temperature Conditions

ZANG Hongmin1, LI Shuchen2, MA Tengfei2, ZHANG Luchen2, WANG Shulei3

（1.Shandong Luqiao Group Co., Ltd., Jinan, 250021；2.Shandong University, Jinan 250061；
3.China Railway 14th Construction Bureau Co., Ltd., Jinan 250000）

Received:2014-05-12 Online:2014-08-20 Published:2014-08-27

Abstract

Abstract: The excessively high geothermal temperature in a water diversion tunnel of Niangyong Hydraulic Electricity Generation Station resulted in serious construction difficulties: the surface temperature of rock mass after the blasting reached 75 degrees Celsius; the highest water rushed in the tunnel was 82 degrees Celsius; the ambient temperature in the tunnel was 53 degrees Celsius. A temperature reduction system through the ventilation was established and the temperature in the tunnel was able to be reached to 30 degrees Celsius. A safe and comfortable tunnel excavation condition could be developed under the excessively high geothermal conditions.

Key words: Water Diversion Tunnels, Excessive High Geo-thermal Conditions, Temperature Reduction Measures, Construction Technique

ZANG Hongmin1, LI Shuchen2, MA Tengfei2, ZHANG Luchen2, WANG Shulei3. Construction of a Long Water Diversion Tunnel under High Geo-thermal Temperature Conditions[J]. , 2014, 28(4): 44-47.

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Construction of a Long Water Diversion Tunnel under High Geo-thermal Temperature Conditions

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