Effects of Shrub Roots in Cold and Arid Environment on Enhancing Slope Stability during Spring Thaw
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.
root-soil compositewater-thermal-mechanical couplingfreezing and melting interfaceslope stability
万方数据
维普
