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Excavation unloading destruction phenomena in rock dam foundations

文献类型：期刊论文

作者Wu, Faquan1; Liu, Tong1; Liu, Jianyou1; Tang, Xianliang2
刊名BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT
出版日期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
DOI10.1007/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
WOS记录号WOS:000265916000009
出版者SPRINGER HEIDELBERG
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)
源URL[http://ir.iggcas.ac.cn/handle/132A11/71626]  
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.

入库方式： OAI收割

来源：地质与地球物理研究所

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