Excavation unloading destruction phenomena in rock dam foundations

doi:10.1007/s10064-009-0202-5

	Excavation unloading destruction phenomena in rock dam foundations
	Wu, Faquan 1; Liu, Tong 1; Liu, Jianyou 1; Tang, Xianliang 2
刊名	BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT
	2009-05-01
卷号	68 期号:2 页码:257-262
关键词	Excavation unloading destruction (EUD) High geo-stress Rock burst Dam foundations
ISSN号	1435-9529
DOI	10.1007/s10064-009-0202-5
文献子类	Article
英文摘要	Excavation unloading destruction (EUD) is a common phenomenon in the large-scale construction sites in Southwest China, where intense horizontal tectonic stresses are present in the rock mass. The paper discusses the Xiaowan hydropower dam where stresses of 23-35 MPa were measured in the strata in the valley sides and 44-57 MPa in the floor of the valley. It describes the characteristics of EUD, discussing the laminar, arched and imbricate fractures which occurred when the near surface strata were excavated for the dam construction. The EUD fractures were largely restricted to the upper 6 m below the excavation and were particularly pronounced in the top 2 m. It is concluded that the typical Mohr Coulomb formula is not applicable where a rock mass near its critical stress is rapidly unloaded. A better understanding of EUD is important for the prediction of rock bursts etc. and hence safety in large engineering constructions in highly stressed strata.
WOS关键词	DISTURBED ZONE ; DAMAGED ZONE ; PROJECT ; MASSES ; MINE
WOS研究方向	Engineering ; Geology
语种	英语
出版者	SPRINGER HEIDELBERG
WOS记录号	WOS:000265916000009
资助机构	Chinese Academy of Sciences(KZCX2-YW-109) ; Chinese Academy of Sciences(KZCX2-YW-109) ; Chinese Academy of Sciences(KZCX2-YW-109) ; Chinese Academy of Sciences(KZCX2-YW-109) ; Chinese Academy of Sciences(KZCX2-YW-109) ; Chinese Academy of Sciences(KZCX2-YW-109) ; Chinese Academy of Sciences(KZCX2-YW-109) ; Chinese Academy of Sciences(KZCX2-YW-109)
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/71628]
专题	中国科学院地质与地球物理研究所
通讯作者	Liu, Jianyou
作者单位	1.Chinese Acad Sci, Key Lab Engn Geomech, Inst Geol & Geophys, Beijing 100029, Peoples R China 2.Kunming Hydropower Invest & Design Inst, Kunming 650051, Peoples R China
推荐引用方式 GB/T 7714	Wu, Faquan,Liu, Tong,Liu, Jianyou,et al. Excavation unloading destruction phenomena in rock dam foundations[J]. BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT,2009,68(2):257-262.
APA	Wu, Faquan,Liu, Tong,Liu, Jianyou,&Tang, Xianliang.(2009).Excavation unloading destruction phenomena in rock dam foundations.BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT,68(2),257-262.
MLA	Wu, Faquan,et al."Excavation unloading destruction phenomena in rock dam foundations".BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT 68.2(2009):257-262.