摘要
Abstract
In order to deeply analyze the slope protection mechanism of plant roots under the action of rainfall infiltration,the surface slope reinforcement model of plant roots was established by MIDAS finite element software in combination with related projects.Numerical calculations were carried out on the slope protection slope and the unreinforced slope under 0,10 h,20 h and 30 h rainfall time respectively.When the rainfall time is 0h,the maximum strain values of the two slopes are 2.44 and 1.45 respectively.The safety factors were 2.35 and 2.54 respectively.When the rainfall time is 30 h,the maximum strain values of the two slopes are 2.83 and 2.63,respectively.The safety factors were 2.04 and 2.13 respectively.The results show that the pore water pressure of plant root protection slope is small under the action of rainfall,and the existence of plant root can effectively reduce the soil shear strain increment on the surface of slope and improve the stability of slope.When the slope is not protected by plant roots,the rainfall will cause a large plastic strain on the slope.When the slope is protected by plant roots,the plastic strain range and magnitude of the slope are smaller than that of the original slope.With the continuous increase of rainfall time,the strengthening effect of surface plants was weakened.The analysis results have some guiding significance for the practical application of plant slope protection engineering.关键词
数值模拟/降雨/植物根系/稳定性Key words
numerical simulation/Rainfall/Plant roots/stability分类
建筑与水利
