不同配比的煤矸石与垃圾筛分土抗剪试验

以自制的土壤剪切仪作为剪切强度测定的仪器,对不同煤矸石与垃圾筛分土的混合体进行抗剪试验,并采用模拟降雨方法研究降雨强度对混合体稳定性的影响。结果表明:煤矸石与垃圾筛分土的混合比在30%～70%区间内,随着煤矸石体积分数的增加,抗剪强度增加;煤矸石体积分数小于30%或大于70%,煤矸石的体积分数与抗剪强度相关性不大。混合体中土壤含水率与抗剪强度成反比,降雨因为会降低混合体的抗剪强度,从而会降低坡面的稳定性。从坡体稳定,有利植物生长角度考虑,煤矸石与垃圾筛分土体积比以50%左右为宜。

Experimental study of effects of different ratio of gangue mixture to screening refuse soil on shearing strength

Using the self-made shear instrument,the shear resistant intensity of the mixed material by the coal gangue and waste soil was measured.And the effect of rainfall intensity on the mixed material stability was also studied by artificial rainfall experiments.The results showed that when the proportion of coal gangue in the mixed material was in the range of 30% and 70%,the shearing strength increased with the coal gangue proportion increasing.When the proportion of coal gangue was more than 70% or less than 30%,the shearing strength was not related to the proportion of coal gangue.In the mixed material,the soil moisture was negatively related to the shear strength.The rainfall would reduce the shear strength of the mixed material,and then reduce the stability of slope.In the aspect of slope stability and plant growth,the suitable proportion of coal gangue and waste soil was about 50%.