Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Comprehensive Study on Seismic Problems of Underground Rock Caverns: A Case Study of Baihetan Underground Cavern Complex
Large hydropower plants in southwestern China usually involve the excavation of underground powerhouses. The underground cavern complex of Baihetan hydropower plant is the largest underground cavern complex currently under construction. As a study case, its seismic stability was comprehensively studied in the current paper. Firstly, the magnitude of ground motion level of design ground motion and ground motion earthquake are discussed according to the results of earthquake safety assessment, as the basis of earthquake power problems. With which the seismic wave forms used in the analysis were synthesized. Then, a medium-rate cyclic loading test was adopted to provide reasonable dynamic strength parameters of rock mass in the seismic dynamic analysis. Finally, two kinds of layout schemes of underground caverns are discussed from the point of view of seismic stability with three-dimensional numerical dynamic simulation. Meanwhile, the seismic capacity of supporting measures was checked. The results show that the improved design with a cylindrical tail surge shaft is safer than the origin design under the impact of earthquake. And the stability of the cavern complex can be well maintained under both the design basis earthquake and the safety evaluation earthquake.
Comprehensive Study on Seismic Problems of Underground Rock Caverns: A Case Study of Baihetan Underground Cavern Complex
Large hydropower plants in southwestern China usually involve the excavation of underground powerhouses. The underground cavern complex of Baihetan hydropower plant is the largest underground cavern complex currently under construction. As a study case, its seismic stability was comprehensively studied in the current paper. Firstly, the magnitude of ground motion level of design ground motion and ground motion earthquake are discussed according to the results of earthquake safety assessment, as the basis of earthquake power problems. With which the seismic wave forms used in the analysis were synthesized. Then, a medium-rate cyclic loading test was adopted to provide reasonable dynamic strength parameters of rock mass in the seismic dynamic analysis. Finally, two kinds of layout schemes of underground caverns are discussed from the point of view of seismic stability with three-dimensional numerical dynamic simulation. Meanwhile, the seismic capacity of supporting measures was checked. The results show that the improved design with a cylindrical tail surge shaft is safer than the origin design under the impact of earthquake. And the stability of the cavern complex can be well maintained under both the design basis earthquake and the safety evaluation earthquake.
Comprehensive Study on Seismic Problems of Underground Rock Caverns: A Case Study of Baihetan Underground Cavern Complex
Cui, Zhen (Autor:in) / Sheng, Qian (Autor:in) / Leng, Xianlun (Autor:in)
International Conference on Geotechnical and Earthquake Engineering 2018 ; 2018 ; Chongqing, China
IACGE 2018 ; 449-458
10.01.2019
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
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