Abstract：The underground powerhouse in Xiangjiaba Hydropower Station has a huge scale，with the characteristics of complex structure，complicated geologic condition，large support quantities and big construction disturbance. Based on a large number of studies，the construction procedures and supporting parameters for underground caverns，especially the main powerhouse，are determined. The strict managements and controls are adopted in the construction；and a real-time monitoring and dynamic analysis system which integrates design，research and construction is established. The measured displacements in the rock masses of underground powerhouse are small and develop stably after excavation，with the maximum magnitudes of 13.36 mm in roof and 6.74 mm in walls，which are smaller than the design values of 20.4 mm in roof and 62.5 mm in walls；and they are smaller than ones of similar underground powerhouse. The principles and procedures of design，construction and management in construction of the Xiangjiaba underground powerhouse complex are summarized，so as to provide some references for the similar large underground powerhouse projects.
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FAN Qixiang，LIU Yiyong，WANG Yi. CONSTRUCTION AND MONITORING STUDY OF LARGE UNDERGROUND POWERHOUSE CAVERNS OF XIANGJIABA HYDROPOWER STATION. , 2011, 30(4): 666-676.
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2011, Vol. 30 
