Analysis of deformation monitoring of large-scale underground
powerhouse during construction period |
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| Authors: | DONG Zhi-hong DING Xiu-li ZHANG Feng WANG Hao |
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| Institution: | (1. Key Laboratory of Geotechnical Mechanics and Engineering of the Ministry of Water Resources; Yangtze River Scientific Research Institute，Wuhan, Hubei 430019，China ; 2. Yangtze River Investigation Planning Design & Research Institute，Wuhan, Hubei 430019，China |
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| Abstract: | Monitoring is one of the important bases for dynamic design and information construction in underground project, and the analysis and reporting of monitoring information are even more important, if they are all-sided, accuracy and timely. The excavation of underground powerhouse of Pengshui project in Wujiang River faces many problems, such as large-scale span and height, complex geological conditions, long period, the disturbance of construction, etc. In order to ensure safety of construction and operation, many monitoring instruments were installed in underground powerhouse, which were used to monitor the deformation and stability of surrounding rockmass in construction. The analysis of monitoring results indicate: the surrounding rockmass of underground powerhouse is stable in general; design supports can enhance the self-stability of rockmass and ensure the stability of underground powerhouse; however, the stability of some local rock masses, especially the shale in the downstream sidewall are bad due to geological condition and rockmass blasting. |
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| Keywords: | large-scale underground powerhouse construction period monitoring results of rock mass |
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