震区泥石流流域内滑坡物源根系固土效应分析

通过室内直剪试验对强震区泥石流流域内的滑坡堆积物源所恢复草本植被的根系进行了固土效应分析,并研究探讨了含水率、含根量对根系固土效应的影响,以及不同植物根系的固土效应差别。结果表明:(1)植被的恢复有利于堆积物源稳定性的增强;(2)恢复植被的坡体,随着含水率的逐渐增加,其稳定性依旧会逐渐增加达到峰值再逐渐变小直至发生破坏;(3)在中华草沙蚕、细裂叶莲蒿和中华山蓼3种植被中,细裂叶莲蒿根系对堆积物源的固土效应最好,其次为中华山蓼,再次为中华草沙蚕。

ANALYSIS OF THE SOIL STABILITY EFFECT OF ROOTS ON THE LANDSLIDE ACCUMULATION SOURCES IN THE DEBRIS FLOW BASIN IN THE EARTHQUAKE AREA

It analyzed the effect of soil stability of herbosa restoration on the landslide accumulation sources in the debris flow basin in the strong earthquake area by chamber direct shear test,and studied the effect of water content and root content,and the different effect of three kind of herbosa roots.The study results as follows:(1)the vegetation restoration made for the enhancing of the stability of the accumulation sources;(2)with the gradual increase of the water content,the stability of the slope with vegetation restoration still gradually increased to reach its peak and then gradually decreased until its damage occurred;(3)among the three vegetations,the root of artemisia gmelinii had the best effect in the effect of soil stability on the accumulation source,in the second place was Oxyria sinensis Hemsl,and the last one was tripogon chinensis.