›› 2010, Vol. 31 ›› Issue (1): 229-232.

• Geotechnical Engineering • Previous Articles     Next Articles

Three-dimensional dynamic stability analysis of high loess slope taking the jiulongshan slope for example

CHEN Chang-lu1, 2，SHAO Sheng-jun1，ZHENG Wan-kun1，NIU Hong-tao1   

  1. 1. Institute of Geotechnical Engineering, Xi’an University of Technology, Xi’an Shangxi 710048 China; 2. School of Civil Engineering, Henan Polytechnic University, Jiaozuo Henan 454000 China
  • Received:2009-08-10 Online:2010-01-10 Published:2010-02-02

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Abstract:

In this paper, the geological conditions, regional tectonic activity and its distribution characteristics of Jiulongshan high loess slope located in high seismic intensity region were firstly analyzed, and then the dynamic stability of Jiulongshan high loess slope was evaluated by a new quasi-static method. Based on analyzing the sensibility of dynamic response and strength law of loess subjected by the cyclic loading and determining the earthquake the seismic inertia force along the slope height indicating the size of the earthquake, a finite difference based quasi-static strength reduction analysis method has been proposed by combining the strength reduction method and the finite difference method. Through the new method analyzing the Jiulongshan loess slope, the displacement and stress distributions of the slope, the relationship between the displacement at key points and the reduction coefficient as well as the dynamic stability safety factor of the high loess slope were obtained. The results agreed quite well with the solutions obtained by traditional two-dimensional limit equilibrium analysis method. It confirms the accuracy of the new quasi-static strength reduction method based on finite difference approach.

Key words: high loess slope, dynamic stability, new quasi-static method, strength reduction

CLC Number: 

  • TU 443
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