Unstable geotechnical problems of columnar jointed rock mass and volcanic tuff soil induced by underground excavation: A case study in the Baihetan hydropower station, China

CORC > 武汉岩土力学研究所 > 中科院武汉岩土力学所 > 岩土力学所知识全产出 > 会议论文

	Unstable geotechnical problems of columnar jointed rock mass and volcanic tuff soil induced by underground excavation: A case study in the Baihetan hydropower station, China
	Jiang, Q.1; Feng, X. T.1; Pei, S. F.1; Duan, X. Q.1; Fan, Q. X.2; Fan, Y. L.2
	2016
会议日期	SEP 24-25, 2016
会议地点	Ischia, ITALY
页码	83-92
英文摘要	In the Baihetan hydropower station of China, periodic volcanic eruptions in history have resulted in current geological coexistence of columnar jointed rock mass with high mechanical strength and volcanic tuff soil with weak mechanical property in the same stratum. The unstable geotechnical problems of columnar jointed rock mass and volcanic tuff soil, such as unloading loose, crack and collapse of columnar jointed basalt, as well as plastic deformation and collapse of volcanic tuff soil induced by underground excavation, have challenged the design and construction of large underground engineering structures. Detailed field investigation was conducted to expose their geological characteristics and corresponding mechanical properties of columnar jointed basalt. Field exploration and experiments were also implemented to estimate the properties of tuff soil with 'hard-soft-fracture' structure, which consists of basalt, tuff soil and cinerite. Our practice indicated that the accurate geological exploration of the columnar jointed rock mass and tuff soil is the key to minimize their adverse effects on the underground engineering. Moreover, a careful construction design that considers blasting control, small opening bench and timely support, is necessary.
会议录	VOLCANIC ROCKS AND SOILS
会议录出版者	CRC PRESS-TAYLOR & FRANCIS GROUP
会议录出版地	BOCA RATON
语种	英语
WOS研究方向	Engineering ; Geology
WOS记录号	WOS:000385791500005
内容类型	会议论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/4881]
专题	岩土力学所知识全产出_会议论文国家重点实验室知识产出_会议论文
作者单位	1.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn ; 2.China Three Gorges Project Corp
推荐引用方式 GB/T 7714	Jiang, Q.,Feng, X. T.,Pei, S. F.,et al. Unstable geotechnical problems of columnar jointed rock mass and volcanic tuff soil induced by underground excavation: A case study in the Baihetan hydropower station, China[C]. 见:. Ischia, ITALY. SEP 24-25, 2016.