含水率对扰动粉土强度恢复规律影响研究

Study on Effect of Moisture to Strength Recovery of Disturbed Silt

试验以太原粉土为研究对象,通过人工改变其含水率,然后室内振动模拟土体施工中受扰动过程;再对其做无侧限抗压试验测应力应变值,分析含水率在相同扰动下,如何影响土体触变强度恢复规律。结果显示:在外界扰动时间相同时,土体含水率越高其受扰动程度越大;在静置时间相同的条件下,强度恢复程度与其含水率呈负相关。探究了土体含水率对其扰动程度和强度恢复之间的相关关系,为进一步研究含水率不同时土体力学性质影响规律提供一定的参考。

The test taking Taiyuan＇ s silt as the research object, through artificial changing its moisture content, then simulate the silt vibration process in laboratory, measuring the sih＇s stress and strain values after unconfined compression test, then analysis the effect of moisture content on the recovery of silt thixotropic strength under the same disturbance. The results showed that, under the same external disturbance, the disturbance degree increases with the moisture content increase ; after the same stewing time, the silt＇ s strength recovery with its moisture con- tent is negatively associated. Through exploring the disturbance degree and strength recovery how to change with the silt moisture content increase, this test results may provide reference for further study of changing soil moisture con- tent how to influence the silt＇ s mechanical properties.