Study on unloading relaxation characteristics of foundation rock mass in middle ground-stress region

被引：0
|
作者：
Zhao, Yong [1 ]
Xu, Mo [1 ]
Qin, Limao [2 ]
Guo, Jian [1 ]
Zhu, Kejun [3 ]
机构：
[1] State Key Lab. of Geoharzards Prevention and Geoenvironment Protection, Chengdu Univ. of Technol., Chengdu 610059, China
[2] Faculty of Geosciences and Environmental Eng., Southwest Jiaotong Univ., Chengdu 610031, China
[3] Chendu Hydroelectric Investigation and Design Inst., Hydropower Consulting Group, Chengdu 610072, China
来源：
Sichuan Daxue Xuebao (Gongcheng Kexue Ban)/Journal of Sichuan University (Engineering Science Edition) | 2014年 / 46卷 / 03期
关键词：
Foundations - Hydroelectric power plants - Rocks - Rock mechanics - Unloading - Hydroelectric power;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
In order to reveal the unloading relaxation characteristics of foundation rock mass after excavation in the middle-ground stress region, supplement the unloading relaxation theory of hydropower projects in western China, and provide scientific basis for the latter engineering treatment measures of Dagangshan hydropower station, the Dagangshan hydropower station was studied. Based on the study of geological background conditions and relying on field investigation and a large number of exploration drillings, geophysical exploration technics, hole camera technique, et al., the characteristics of foundation rock mass after excavation in the middle-ground stress region were discussed, including the supergene and the endogenous unloading relaxation phenomenon, which assume the fissures opening, rock mass loosening and entirety relaxation, but without any new rock failure. Meanwhile, the unloading relaxation characteristics of foundation rock mass were markedly controlled by the structure of rock mass in the middle ground-stress area.
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页码：7 / 14
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