结合边坡施工的模型试验研究,对坡体的相似材料进行了试配,研究了不同配比对坡体相似材料黏聚力和内摩擦角的影响规律;最终选用采用红粘土(烘干)、重晶石粉、滑石粉、水为基本材料按配合比0.7∶0.15∶0.05∶0.1模拟滑体,采用红粘土(烘干)、重晶石粉、滑石粉、石英砂、水泥、水为基本材料为基本材料按配合比0.3∶0.38∶0.03∶0.1∶0.06∶0.13模拟滑床,构建了几何相似比1∶10的模型试验;通过试验发现模型边坡临空面附近的坡体在开挖之后3-4 h内变形最明显,同时也诱发上级边坡土体产生一定松弛变形。
Combiningwiththeresearchon slope construction,testsofsimilarmaterialsof slope are performed. Studied the influence of different proportions on the slope cohesion and internalfriction angle;And finally select the red clay( drying),barite powder,talcum powder,water as the basic materials by mixing ratio 0. 7 ∶ 0. 15 ∶ 0. 05 ∶ 0. 1 to simulate sliding mass,select the red clay( drying),barite powder,talcum powder,quartz sand,cement,water as the basic materials by mixing ratio 0. 3 ∶ 0. 38 ∶ 0. 03∶ 0. 1 ∶ 0. 06 ∶ 0. 13 to simulate sliding bed,building a model of 1 ∶ 30 geometric similarityratio; through the test find that soil near the free face of model slope deforms obviously after excavation within 3 - 4 h,and also induce the soil of upper slope has a certain relaxation deformation.