Rock and Soil Mechanics ›› 2023, Vol. 44 ›› Issue (S1): 581-592.doi: 10.16285/j.rsm.2022.1360

• Geotechnical Engineering • Previous Articles     Next Articles

Borehole imaging characteristics and quality evaluation methods of clastic rock slope in Three Gorges Reservoir area

SUN Qian-cheng1, 2, XU Xiao1, 2, LIU Sheng1, 2, XU Zhi-hua1, 2, HE Yu-ming3, GUO Hao-sen4, ZHANG Guo-dong1. 2   

  1. 1. Hubei Key Laboratory of Disaster Prevention and Mitigation, China Three Gorges University, Yichang, Hubei 443002, China; 2. National Field Observation and Research Station of Landslides in Three Gorges Reservoir Area of Yangtze River, China Three Gorges University, Yichang, Hubei 443002, China; 3. Hubei Hydrogeological Engineering Geological Survey Institute, Yichang, Hubei 443000, China; 4. Jiangxi Key Laboratory of Disaster Prevention-Mitigation and Emergency Management, Nanchang, Jiangxi, 330013, China
  • Received:2022-09-02 Accepted:2023-03-15 Online:2023-11-16 Published:2023-11-19
  • Supported by:
    This work was supported by the National Natural Science Foundation of China (51909136) and the Open Research Fund of Hubei Key Laboratory of Disaster Prevention and Mitigation (China Three Gorges University) (2022KJZ15)

PDF (Chinese)

50

Abstract: The lithology of the strata in the Three Gorges Reservoir area is complex, and there is significant difference in the occurrence environment of the rock mass. There are many factors that affect the quality of the rock mass. Under the periodic hydraulic action, the clastic rock bank slope rock mass has formed a unique structural feature, which is unfavorable to the long-term safety and stability of the bank slope. Based on the survey and statistics of the characteristics of clastic rocks in the reservoir area, a large number of in-situ borehole tests were carried out, the typical borehole imaging characteristics of clastic rock of bank slope in the reservoir area were classified and summarized, and the block size and fracture characteristics of borehole cores of rock masses with different fracture characteristics were analyzed in detail. Based on the corresponding relationship between core fracture characteristics and borehole imaging fracture characteristics, the rock mass quality evaluation index RQ is established, and its applicability is verified by comparing with the traditional RQD and acoustic testing results. The research results show that the borehole imaging characteristics affecting the rock mass quality of the clastic rock reservoir bank in the Three Gorges reservoir area mainly include four structural types: sedimentary layered structure, soft filling structure, primary fracture zone and borehole axial fracture cutting. RQ takes into account the different structural types to divide the length zones of blocks, and quantifies the contribution of rock mass ratio in different regions to the rock mass quality evaluation value. Based on the internal structural characteristics of rock mass, the rock mass quality of clastic rock bank slope can be evaluated more objectively, avoiding the error introduced by mechanical damage during drilling and coring. The research results are helpful to analyze the quality distribution characteristics of clastic rock bank slope rock mass in the Three Gorges Reservoir area, and provide a theoretical method and technical idea for quantitative description of rock mass quality evolution.

Key words: Three Gorges Reservoir area, clastic rock bank slope, borehole imaging, rock mass features, rock mass quality evaluation

CLC Number: 

  • TU 451
[1] WANG Li, NAN Fang-yun, WANG Shi-mei, CHEN Yong, LI Xiao-wei, FAN Zhi-hong, CHEN Yu-shan, . Infiltration characteristics and deformation mechanism of rainfall-induced landslides in Three Gorges Reservoir Area based on 1D and 2D model tests [J]. Rock and Soil Mechanics, 2023, 44(5): 1363-1374.
[2] HUANG Bo-lin, YIN Yue-ping, LI Bin, BAI Lin-feng, QIN Zhen, . Simplified numerical model and verification for the impulse wave generated by situated collapse of a dangerous columnar rock mass [J]. Rock and Soil Mechanics, 2021, 42(8): 2269-2278.
[3] YIN Ming-lun, ZHANG Jin-xun, JIANG Yu-sheng, JIANG Hua, SHANG Xiao-xu, . Study of correction of the structural plane category based on the rock mass integrity coefficient characterized by the volumetric joint count [J]. Rock and Soil Mechanics, 2021, 42(4): 1133-1140.
[4] ZHANG Quan, HUANG Bo-lin, ZHENG Jia-hao, ZHAO Hai-lin, FENG Wan-li, CHEN Xiao-ting, . Prediction and analysis of surge generated by crushing failure collapse of columnar dangerous rock mass [J]. Rock and Soil Mechanics, 2021, 42(10): 2845-2854.
[5] DING Zhen-jie, ZHENG Jun, LÜ Qing, DENG Jian-hui, TONG Meng-sheng, . Discussion on calculation methods of quality index of slope engineering rock mass in Standard for engineering classification of rock mass [J]. Rock and Soil Mechanics, 2019, 40(S1): 275-280.
[6] WANG Jin-chao, TAO Dong-xin, HUANG Yan-qing, WANG Chuan-ying, HAN Zeng-qiang, HU Sheng, . Borehole imaging method based on ultrasonic synthetic aperture technology [J]. Rock and Soil Mechanics, 2019, 40(S1): 557-564.
[7] WANG Shi-chang，HUANG Bo-lin，LIU Guang-ning，CHEN Xiao-ting. Numerical simulation of tsunami due to slope failure at Gongjiafang on Three Gorges reservoir [J]. , 2015, 36(1): 212-218.
[8] LU Shu-qiang ，YI Qing-lin ，YI Wu ，HUANG Hai-feng ，ZHANG Guo-dong , . Analysis of deformation and failure mechanism of Shuping landslide in Three Gorges reservoir area [J]. , 2014, 35(4): 1123-1130.
[9] XIAO Shi-rong , LU Shu-sheng , GUAN Hong-fei , SONG Gui-lin，. Study of geomechanical model of Liangshuijing landslide in Three Gorges Reservoir area [J]. , 2013, 34(12): 3534-3542.
[10] LU Tao, WANG Kong-wei, LI Jian-lin. Study of failure mode of sandstone under reservoir water pressures [J]. , 2011, 32(S1): 413-0418.
[11] WU Jian，FENG Shao-kong，LI Hong-jie. Study of automatically extracting structural plane parameters from borehole images [J]. , 2011, 32(3): 951-957.
[12] LI Yuan-yao, YIN Kun-long, CHAI Bo, ZHANG Gui-rong. Study on statistical rule of shear strength parameters of soil in landslide zone in Three Gorges Reservoir area [J]. , 2008, 29(5): 1419-1424.
[13] WANG Rui-hong , LI Jian-lin , JIANG Yu-zhou , WANG Le-hua , LI Hong-xin . Quality evaluation of unloaded slope rock mass [J]. , 2008, 29(10): 2741-2746.
[14] WANG Chuan-ying ，PANG Zhi-cheng ，CHEN Xiao-dong,. Engineering application and analysis of index of rock mass integrity (IRMI) [J]. , 2006, 27(S2): 565-569.
[15] LI Wei-shu, WU Ai-qing, DING Xiu-li. Study on influencing factors of shear strength parameters of slide zone clay in Three Gorges Reservoir area [J]. , 2006, 27(1): 56-60.
Viewed
Full text


Abstract

Cited
  Shared   
  Discussed   
[1] LIU Xiao-wen，CHANG Li-jun，HU Xiao-rong. Experimental research of matric suction with water content and dry density of unsaturated laterite[J]. , 2009, 30(11): 3302 -3306 .
[2] WANG Guan-shi, LI Chang-hong, CHEN Bao-jun, LI Sh-ihai. Propagation law of stress wave in nonlinear structural surface medium[J]. , 2009, 30(12): 3747 -3752 .
[3] DENG Qin，GUO Ming-wei，LI Chun-guang，GE Xiu-run. Vector sum method for slope stability analysis based on boundary element method[J]. , 2010, 31(6): 1971 -1976 .
[4] WAN Shao-shi, NIAN Ting-kai, JIANG Jing-cai, LUAN Mao-tian. Discussion on several issues in slope stability analysis based on shear strength reduction finite element methods (SSR-FEM)[J]. , 2010, 31(7): 2283 -2288 .
[5] LIU Jia, WANG Dong. Tension resistance and suction of plate anchor foundation in normally consolidated clay[J]. , 2009, 30(3): 735 -740 .
[6] ZHAO Shang-yi, ZHENG Ying-ren, LI An-hong, QIU Wen-ping, TANG Xiao-song. Application of multi-row embedded anti-slide piles to landslide of Wulong county government[J]. , 2009, 30(S1): 160 -164 .
[7] WEI Hou-zhen, YAN Rong-tao, WEI Chang-fu, WU Er-lin, CHEN Pan, TIAN Hui-hui. Summary of researches for phase-equilibrium of natural gas hydrates in bearing sediments[J]. , 2011, 32(8): 2287 -2294 .
[8] WANG Guo-cui, YANG Min. Nonlinear analysis of laterally loaded piles in sand[J]. , 2011, 32(S2): 261 -267 .
[9] YUAN Jing-qiang , CHEN Wei-zhong , TAN Xian-jun , WANG Hui. Mesomechanical simulation of grouting in weak strata[J]. , 2011, 32(S2): 653 -659 .
[10] JI Mao-wei , WU Shun-chuan , GAO Yong-tao , GE Lin-lin , LI Xiao-jing　. Construction monitoring and numerical simulation of multi-arch tunnel[J]. , 2011, 32(12): 3787 -3795 .
Copyright © Rock and Soil Mechanics, All Rights Reserved.
Tel: 027-87198484, 87199252, 87199253, 87198752　E-mail: ytlx@whrsm.ac.cn
Powered by Beijing Magtech Co. Ltd