JOURNAL OF SHANDONG UNIVERSITY (ENGINEERING SCIENCE) ›› 2010, Vol. 40 ›› Issue (2): 66-70.

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Inversion  of  an  initial  geostress  field  by  the  method  of  multivariate   analysis  and  the  research  of  engineering  application

YUE Xiao-lei1, LI Shu-cai2, CHEN Qi-hui1, GE Yan-ping1   

  1. 1. School of Civil Engineering, Shandong Jianzhu University, Jinan 250101, China; 2. Geotechnical and Structural  Engineering Research Center, School of Civil Engineering, Shandong University, Jinan 250061, China
  • Received:2009-11-26 Online:2010-04-16 Published:2009-11-26

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Abstract:

Based on engineering geological conditions and measured data of the geostress at a hydropower station, 3D geological models under each affecting factor were calculated by means of finite element computing tools and MATLAB. A multivariate regression model was created between the measured and calculated value of geostress at measurement points, and the optimal regression coefficient of the model was found. Consequently, the distributions of initial geostress of this area were obtained. This was the first attempt to take into account the independence and internal relations among each stress component. Thus,  more reasonable distributions of initial geostress of this area were obtained. The result indicated that the 3D calculating geostress field was reasonable.

Key words: geostress survey, initial geo-stress field, inverse analysis, multivariate regression analysis, finite element

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