Characterization of the disturbed zone in a large rock excavation for the Three Gorges Project | |
Ge, XR; Lee, CF; Deng, JH | |
刊名 | CANADIAN GEOTECHNICAL JOURNAL
![]() |
2001 | |
卷号 | 38期号:1页码:95-106 |
关键词 | Disturbed Zone Mechanical Properties Brittle Rock Mass Excavation Finite Element Method Reinforcement |
ISSN号 | 0008-3674 |
DOI | 10.1139/cgj-38-1-95 |
英文摘要 | Excavation in a rock mass leads to the perturbation of the stress regime, often creating a stress-relieved, locally weakened zone known as the disturbed zone. This paper presents the results of in situ studies that were carried out both in the central rock barrier (or separation block) between the shiplift and the temporary shiplock and in the northern slope of the permanent shiplock of the Three Gorges Project. The vertical extent of the disturbed zone was determined jointly by cross-hole seismic wave penetration testing and borehole elastic modulus testing, and the horizontal extent was assessed by monitoring and evaluating the deformation characteristics. Compared with the undisturbed rock mass, the P-wave velocity of the disturbed zone was reduced by 34-38% and the borehole elastic modulus by 12-31%. The reductions were caused by the opening of primary structural planes or the extension of apertures due to local sliding along the structural planes. In the disturbed zone, no newly formed fractured planes were found. The observed disturbed zone was compared with the tensile stress zones and the shear-damaged zones calculated by the finite element method. A rock reinforcement scheme was recommended and implemented. |
WOS研究方向 | Engineering ; Geology |
语种 | 英语 |
出版者 | NATL RESEARCH COUNCIL CANADA |
WOS记录号 | WOS:000167370700008 |
内容类型 | 期刊论文 |
源URL | [http://119.78.100.198/handle/2S6PX9GI/3095] ![]() |
专题 | 岩土力学所知识全产出_期刊论文 |
作者单位 | Chinese Acad Sci, Inst Rock & Soil Mech; Univ Hong Kong, Dept Civil Engn |
推荐引用方式 GB/T 7714 | Ge, XR,Lee, CF,Deng, JH. Characterization of the disturbed zone in a large rock excavation for the Three Gorges Project[J]. CANADIAN GEOTECHNICAL JOURNAL,2001,38(1):95-106. |
APA | Ge, XR,Lee, CF,&Deng, JH.(2001).Characterization of the disturbed zone in a large rock excavation for the Three Gorges Project.CANADIAN GEOTECHNICAL JOURNAL,38(1),95-106. |
MLA | Ge, XR,et al."Characterization of the disturbed zone in a large rock excavation for the Three Gorges Project".CANADIAN GEOTECHNICAL JOURNAL 38.1(2001):95-106. |
个性服务 |
查看访问统计 |
相关权益政策 |
暂无数据 |
收藏/分享 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论