In order to study the potential slip surface damage form,displacement characteristics and stability effects of slopes under different angle α between vegetation root system and slope freeze-thaw interface.The results show that with the increase of thawing depth,the equivalent plastic strain penetration zone of plain soil and root-soil composite slopes during spring thawing period is more obvious and prone to plane slip along the freeze-thaw interface.Compared with plain soil slopes,the maximum displacement of root-soil composite slopes during spring thawing period(March)is reduced by about 69.65％,and the maximum displacement of root-soil composite slopes during spring thawing period(April)is reduced by about 71.88％.The maximum displacement of the root-soil composite slope is reduced by about 69.65％in the spring thawing period(March)and 71.88％in the spring thawing period(April),and the reduction of the displacement of the root-soil composite slope tends to increase with the increase of α angle,which shows that the root system has strong soil consolidation ability when it reaches the freeze-thaw interface.When the angle α between the root system and the freeze-thaw interface is increased from 45° to 90°,the root-soil composite slope is more susceptible to planar sliding along the freeze-thaw interface.When the angle between the root system and the freeze-thaw interface is increased from 45° to 90°,the safety coefficient of the slope of root-soil complex tends to increase,and when the root system is perpendicular to the freeze-thaw interface of the slope,the root system has a relatively maximum effect of enhancing the soil consolidation and slope protection of the slope during the spring-thaw period,which can effectively improve the stability of the slope during the spring-thaw period.The research results have theoretical research value and practical guidance significance for the discussion of plant roots at the freeze-thaw interface on the stability of spring thaw slopes.
关键词
根-土复合体/水热力耦合/冻融界面/边坡稳定性
Key words
root-soil composite/water-thermal-mechanical coupling/freezing and melting interface/slope stability
维普
万方数据