Failure of a Rock Slope Ten Years after Excavation

Authors

  • He-Jun Chai National Engineering Laboratory for Road Engineering and Disaster Prevention and Reduction Technology in Mountainous Areas, China Merchants Chongqing Communications Technology Research and Design Institute Co. Ltd., Chongqing 400067, P.R. China
  • Jun-Jie Wang Chongqing Jiaotong University, Chongqing 400074, P.R. China
  • Jian-Jun Guo Chongqing Jiaotong University, Chongqing 400074, P.R. China
  • Ji-Ping Bai University of South Wales, Treforest Campus, United Kingdom

DOI:

https://doi.org/10.15377/2409-9821.2017.04.4

Keywords:

High artificial rock slope, Time since excavation, Failure, Weathering, Geological structures.

Abstract

 In the present study, a rock cut slope in Chongqing of China, which failed suddenly about ten years after excavation, was reported. The survey results after failure indicated that the rock masses of the rock slope were highly fractured and heavily weathered, the critical slip surface was composed of three connected discontinuities from the toe to top of slope. The factors resulting in the failure of rock slope were mainly initial excavation and weathering process. The initial excavation removed original supporting role of the excavated rock masses at the toe of the slope to the upper unexcavated rock masses, and broken the original ground stress balance. The physical and chemical weathering after the initial excavation cracked progressively the rock masses, deteriorated the mechanic properties of the rock masses, and changed the stresses and strains in the rock slope. The stability of high artificial rock slope during operation should be paid attention to. The characteristics of geological structure, unloading induced by excavation, and weathering have important effects on the evolution for deformation of artificial rock high slope.

Author Biographies

Jun-Jie Wang, Chongqing Jiaotong University, Chongqing 400074, P.R. China

Key Laboratory of Hydraulic and Waterway Engineering of Ministry of Education

Jian-Jun Guo, Chongqing Jiaotong University, Chongqing 400074, P.R. China

Key Laboratory of Hydraulic and Waterway Engineering of Ministry of Education

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Published

2017-12-14

How to Cite

1.
He-Jun Chai, Jun-Jie Wang, Jian-Jun Guo, Ji-Ping Bai. Failure of a Rock Slope Ten Years after Excavation. Int. J. Archit. Eng. Technol. [Internet]. 2017Dec.14 [cited 2021Sep.25];4(1):24-32. Available from: https://www.avantipublishers.com/jms/index.php/ijaet/article/view/788

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