Based On The 3D PLAXIS Slope Stability Studies Under The Influence Of Rainfall

The stability of slope is an important research direction in geotechnical engineering, it is related to people’s production and life. And landsides often occur more frequently in the process of seasonal heavy rainfall or after the rain, so the research on the slope stability which is under the influence of rainfall has been attained more and more attention. Scholars at home and abroad obtained good results by studying from different angles and with methods. On the basis of this, combined with the engineering example, the application of PLAXIS finite element software stability under the influence of rainfall on the slope minutes were calculated and analyzed. The main research contents and results are as follows:(1) Combined with the engineering practice, a three-dimensional finite element model is established, and three-dimensional finite element is carried out, The applicability of the model boundary dimension, the simulation of rainfall infiltration, and the criterion of slope failure are verified. The effect of rainfall on slope stability is simulated and analyzed by means of seepage coupling calculation(2)When reinforce measures is taken on the slope, simple two-dimensional plane strain analysis of the supporting structure of actual three-dimensional stress state is obviously powerless. In this article, the three-dimensional model based on PLAXIS is used to calculate and analyze the interaction between soil and structure, in comparison with structure reinforcement force exertion and its distraction form and size of the simplified method compared, the structure derived from the internal force more real and reasonable. It is suggested that it is necessary to simulate the finite element calculation and analysis of rainfall in the slope reinforcement design, to make it more safe and reasonable.(3)Anti-slide pile is a widely used slope reinforcement measures, its size is usually large, and most of its materials are impermeable. The infiltration of rainwater in the slope can be hindered by the infiltration of rainfall infiltration, thereby affecting the internal force of the anti-slide pile, which will bring new opposite affects to the stability of the slope. Through three-dimensional finite element analysis, after taken the pile spacing, the section size into consideration we can make a consideration that the pile spacing has little influence on the water seepage, the section size increases with the internal force of anti-side pile.