Simulation Of Stage Excavation And Evaluation The Stability Of Slope By Using Two-dimensional Elastoplastic Finite Element Method

The slope stability is an important research area in geotechnical engineering all the time. With the fast development of domestic investment in capital construction and the western China exploitation in these years, the rock slope stability analysis is more and more in slope with supports of highway construction. In slope's construction process, that the slope become invalid usually bring about. If the slope slides, the result will be disastrous, so the simulation of the evaluation process for a slope stability is significant.This paper studied the slope of ChangZhang highway, following the research route as field investigation - laboratory test - establishment of calculation model - stability analysis of rock slope. In order to evaluate the stability of the slope, rock mechanics parameters of rock-mass have been obtained by laboratory and optimized by empirical formula. These parameters have been adopted by NCAP-FS program.The simulation of stage excavation of the high slope of ChangZhang highway is carried out by using two-dimensional elastoplastic finite element method, thinking the influence of blasting and rock joint. The rock-mass's deformation, stresses and yielding state in the excavation process are analyzed respectively .The integral safety of the high slope has been discussed by using the method of lowing material's strength safety factor and in light of the yielding rate of the slope's rock-mass element and variation of displacements of the key parts. After the research of important slope K123 and K135, We can draw a conclusion that the slopes are stable in construction process.