Rock and Soil Mechanics ›› 2020, Vol. 41 ›› Issue (5): 1740-1749.doi: 10.16285/j.rsm.2019.0485

• Geotechnical Engineering • Previous Articles     Next Articles

Seismic behavior research and reinforcement effect evaluation of composite retaining structures with nuclear safety level anti-dip layered soft rock slope under strong earthquakes

ZHANG Lu-ming1, ZHOU Yong1, FAN Gang 2, CAI Hong-yu3, DONG Yun1   

  1. 1. Nuclear Industry Southwest Survey & Design Institute Co., Ltd., Chengdu, Sichuan 610061, China; 2. College of Water Resource & Hydropower, Sichuan University, Chengdu, Sichuan 610065, China; 3. Nuclear Power Institute of China, Chengdu, Sichuan 610213, China
  • Received:2019-03-11 Revised:2019-09-12 Online:2020-05-11 Published:2020-07-07
  • Supported by:
    This work was supported by the Department of Systems Engineering, National Defense Science and Technology Bureau（[2015]548）and the National Defense Basic Scientific Research Projects（[2017]1790）

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Abstract: The methods of calculating seismic influence coefficient and dynamic magnification factor of seismic design code in different industries are compared, and the suitability of current nuclear safety guides to high slope anti-seismic stability assessment of nuclear safety grade is studied. Taking the typical anti dip layered soft rock high steep slope at a certain nuclear safety grade for example, this paper discusses the application of various methods to analyze the dynamic amplification effect, safety and seismic performance of retaining structures. Firstly, on the basis of typical two-dimensional calculation profile, the preliminary reinforcement design of slope is conducted by quasi-static method. Then, based on large-scale shaking table tests and numerical calculation, the dynamic amplification effect of the soft rock slope and the dynamic response characteristics of the retaining structure under different seismic loads are studied. Finally, the safety of the slope is evaluated by field engineering monitoring. The results show that under strong earthquake, it is feasible to design the nuclear safety slope according to the seismic parameters in other industry codes. The whole slope is stable and the seismic performance of the retaining structure is good by shaking table and numerical analysis. The research ideas and methods are reasonable and feasible, and a lot of engineering investment will be saved. The present research enriches the theory of high steep slope stability with nuclear safety grade and can provide technical support for seismic safety evaluation and engineering design of nuclear safety grade slopes.

Key words: nuclear safety grade, high steep slope of soft rock, shaking table test, seismic capacity, acceleration amplification

CLC Number: 

  • P 642
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