Model test on stability of straw reinforced soil slope
In order to study the stability and deformation failure characteristics of rice straw reinforced soil slope,the unconfined compressive strength test and slope stability model test of rice straw reinforced soil were carried out successively.According to the unconfined compressive strength test,the soil deformation can be effectively inhibited by adding straw to the soil,and when the reinforcement rate of straw is 0.2%and the length of reinforcement is 25mm,which is the optimal reinforcement condition,the unconfined compressive strength of the reinforced soil is the highest,and the straw have the best inhibition effect on the deformation of the sample.On this basis,the stability model test of straw reinforced soil slope under the optimal reinforcement condition was carried out.The test results show that compared with the plain soil slope,the straw reinforcement can effectively improve the ultimate bearing capacity of the slope and reduce the vertical displacement.The horizontal displacement trend of both plain soil slopes and reinforced soil slopes can be divided into three stages of evolution:stable stage,constant velocity deformation stage,and accelerated deformation stage(including weak acceleration deformation stage and strong acceleration deformation stage),and the reinforcement effect of straw plays a significant role in the weak acceleration deformation stage,which can significantly improve the slope's resistance to deformation.After the complete failure of the reinforced soil slope,the sliding surface is deep and wide,and there are relatively more small cracks around the sliding surface,so the overall integrity and stability are better than those of the plain soil slope.
NETL
NSTL
万方数据
