Numerical Investigation of a Local Precise Reinforcement Method for Dynamic Stability of Rock Slope under Earthquakes Using Continuum–Discontinuum Element Method

Danqing Song, Wanpeng Shi, Chengwen Wang (), Lihu Dong, Xin He, Enge Wu, Jianjun Zhao and Runhu Lu
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Danqing Song: School of Civil Engineering and Transportation, South China University of Technology, Guangzhou 510640, China
Wanpeng Shi: School of Civil Engineering and Architecture, Henan University, Kaifeng 475004, China
Chengwen Wang: State Key Laboratory of Hydroscience and Engineering, Tsinghua University, Beijing 100084, China
Lihu Dong: State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology, Chengdu 610059, China
Xin He: China Construction Fifth Engineering Division Co., Ltd., Changsha 410000, China
Enge Wu: State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology, Chengdu 610059, China
Jianjun Zhao: State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology, Chengdu 610059, China
Runhu Lu: School of Civil Engineering and Architecture, Henan University, Kaifeng 475004, China

Sustainability, 2023, vol. 15, issue 3, 1-24

Abstract: The slope reinforcement scheme has an important influence on the prevention and control of landslides. A reasonable reinforcement scheme can improve the reliability, economy and efficiency of landslide resistance. It is urgent to establish a local precise reinforcement method for landslides on the basis of clear process and the instability modes of landslides. Taking a high-steep anti-dip rock slope as an example, six numerical models are established by using the continuum–discontinuum element method (CDEM) to carry out seismic damage and dynamic analysis of slopes. By comparing the seismic response and damage characteristics of being unstrengthened, local precise reinforcement and overall reinforcement models, the applicability of the proposed local precise reinforcement method for the slopes is discussed. The results show that the determination of the dynamic amplifying effect and seismic damage characteristics of slopes is the primary prerequisite of the local precise reinforcement method. The dynamic amplification effect of the slope toe, crest and shallow slope surface are much larger, that is, they are the potential reinforcement areas. The local precision reinforcement times should be controlled within a certain number of times, and the slope after the first three times of the local reinforcement effect is the best. However, more than three times after the reinforcement effect it becomes worse. Moreover, the dynamic amplification effect, the equivalent crack ratio and the mechanical energy of the slope after three times of local precision reinforcement are similar to the overall reinforcement effect, which indicates that local precision reinforcement has good feasibility. This work can provide references for landslide disasters prevention and control.

Keywords: seismic response characteristics; local precise reinforcement method; reinforcement effect; anti-dip rock slope; CDEM (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2023
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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