Effects of Dense Unloading Fissures on the Stability of High and Steep Slope of Dagangshan Hydropower Station

WANG Di-kai; WANG Jie-xiong; DONG Yu-fei

doi:10.3969/j.issn.1001-5485.2014.11.0182014,31(11):87-91,107

PDF(2621 KB)

Journal of Changjiang River Scientific Research Institute ›› 2014, Vol. 31 ›› Issue (11) : 87-91. DOI: 10.3969/j.issn.1001-5485.2014.11.0182014,31(11):87-91,107

ANALYSIS OF DAM FOUNDATION AND SLOPE

Effects of Dense Unloading Fissures on the Stability of High and Steep Slope of Dagangshan Hydropower Station

WANG Di-kai, WANG Jie-xiong, DONG Yu-fei

Author information +

History +

Abstract

In the light of special geological conditions of high rock slope in southwest China, we propose a new monitoring method which integrates the monitoring of slope surface, shallow-layer, deep-layer and microseismic monitoring based on long-term engineering practice and summary. According to monitoring results and the geological conditions and slope failure mode, we analyze the deformation of area with dense unloading fissures responding to slope excavation, and summarize the deformation characteristics and analyze its influence on slope stability. The area with dense unloading fissures on the right bank slope of Dagangshan hydropower station is taken as a case study. Furthermore, we compare the conventional monitoring results and microseismic monitoring results with the results of numerical simulation by RFPA^3D. The comparison reveals that the influence of dense unloading fissures is mainly reflected in the slope rock mass structure along the surface deformation.

Key words

Dagangshan Hydropower Station / slope monitoring / microseismic monitoring / dense unloading fissures / high-steep slope / stability analysis

Cite this article

EndNote

Ris (Procite)

Bibtex

Download Citations

WANG Di-kai, WANG Jie-xiong, DONG Yu-fei. Effects of Dense Unloading Fissures on the Stability of High and Steep Slope of Dagangshan Hydropower Station[J]. Journal of Changjiang River Scientific Research Institute. 2014, 31(11): 87-91 https://doi.org/10.3969/j.issn.1001-5485.2014.11.0182014,31(11):87-91,107

References

[1] 黄润秋.中国西南岩石高边坡的主要特征及其演化. 地球科学进展,2005,20(3):292-297. (HUANG Run-qiu. Main Characteristics of Rock Slopes in South Eastern China and Their Dynamic Evolution. Advances in Earth Science,2005,20(3): 292-297.(in Chinese))
[2] 黄润秋.岩石高边坡发育的动力过程及其稳定性控制. 岩石力学与工程学报,2008,27(8):1525-1544. (HUANG Run-qiu. Geodynamical Process and Stability Control of High Rock Slope Development. Chinese Journal of Rock Mechanics and Engineering,2008,27(8):1525-1544.(in Chinese))
[3] 王正军,范志勇,封志勇.岩石高边坡岩体变形测量分析研究.长沙理工大学学报(自然科学版),2007,5(1) :32-37(WANG Zheng-jun, FAN Zhi-yong, FENG Zhi-yong. Deformation Determination of Rock Mass in High Rock Slope. Journal of Changsha University of Science and Technology(Natural Science),2007,5(1) :32-37.(in Chinese))
[4] 许斌,何秀风,桑文刚,等.GPS一机多天线技术在小湾电站边坡监测中的应用.水电自动化与大坝监测,2005,29(3):64-67. (XU Bin,HE Xiu-feng,SANG Wen-gang,et al. Application of GPS Multi-antenna Technology to Slope Deformation Monitoring at Xiaowan Hydropower Station. Hydropower Automation and Dam Monitoring,2005,29(3):64-67.(in Chinese))
[5] 吴志坚,薛俊华.微震监测技术在深部矿山中的应用.安徽建筑工业学院学报,2012,20(5):19-23. (WU Zhi-jian,XUE Jun-hua. Application of Microseismic Monitoring to Deep Mines. Journal of Anhui Institute of Architecture ＆ Industry,2012,20(5):19-23. (in Chinese))
[6] 唐春安,李连崇,李常文,等.岩土工程稳定性分析RFPA强度折减法. 岩石力学与工程学报,2006,25(8):1522-1530. (TANG Chun-an,LI Lian-chong,LI Chang-wen,et al. RFPA Strength Reduction Method for Stability Analysis of Geotechnical Engineering. Chinese Journal of Rock Mechanics and Engineering,2006,25(8):1522-1530. (in Chinese))
[7] 祁生文,伍法权,丁振明,等. 从工程地质类比的角度看锦屏一级水电站左岸深部裂缝的形成. 岩石力学与工程学报,2004,23(8):1380-1384.(QI Sheng-wen,WU Fa-quan,DING Zhen-ming,et al. Study on Mechanism of Deep Fractures of Jinping First Stage Hydropower Station by Engineering Geology Analogy. Chinese Journal of Rock Mechanics and Engineering,2004,23(8):1380-1384. (in Chinese))
[8] 王芝银,李云鹏. 地下工程位移反分析法及程序. 西安:陕西科学技术出版社,1993.(WANG Zhi-yin,LI Yun-peng. Program and Back Analysis Method in Underground Engineering. Xi’an:Shaanxi Science and Technology Press,1993.(in Chinese))