MLE NEPHOGRAMS FOR STABILITY ANALYSIS OF STEEP SLOPES BASED ON MULTIVARIATE PHASE SPACE RECONSTRUCTION
Deformation monitoring provides an important basis for identifying slope instability, and the maximal Lyapunov exponent (MLE) extracted from slope deformations indicates the dynamic features of nonlinear evolution. This paper investigates the phase space reconstruction of multivariate time series. Based on both phase space reconstruction of multivariable time series and the reversible and irreversible properties of time trajectories, the generalized estimation of MLE method is proposed to detect dynamic features buried in slope deformations using bi-directional search phase point. The developed method is characterized by its robustness, high accuracy and dimension flexibility. In the end, a case is studied for the Number Two steep slope at Xiaowan hydropower station according to the proposed method, and the results show that the MLE nephograms and stability zoning maps, derived from the developed method with the help of Ordinary Kriging tool, can effectively reveal the traction deformation mechanism of this slope from bottom to top and the result is in good agreement with actual deformation in the field. The validity of proposed method is proven and can be reliably used for stability analysis of slopes.
ZHI-PING LIU XIU-FENG HE MIN HE
Institute of Satellite Navigation & Spatial Information System, Hohai University Nanjing 210098, P.R.China
国际会议
The 7th International Symposium on Rockburst and Seismicity in Mines(2009年第七届国际岩爆与微振动性学术研讨会)
大连
英文
149-156
2009-08-21（万方平台首次上网日期，不代表论文的发表时间）