白沟河粉砂的水泥改良效果评价

Evaluation on Cement Improvement Effect of Baigou River Silt

为了在白沟河治理中能有效利用岸堤粉砂,通过对白沟河岸堤粉砂按照不同的压实度、不同的水泥含量进行制样,进行不同龄期养护,再对样品进行饱和。分析了岸堤粉砂在天然状态的最大干密度、最优含水率和在饱和状态的渗透系数、压缩模量、粘聚力和内摩擦角(三轴UU试验)等物理力学参数的变化规律。随着水泥含量增大,最大干密度和最优含水率也随之增大;随着水泥含量、龄期和压实度增大,主要物理力学参数随之增大,但其变化幅度具有明显的不同特征和规律性。此次研究为白沟河河道边坡治理中就地利用粉砂提供了理论数据和依据。

Taking Baigou river bank silt as an example,in order to make effective use of Baigou river bank silt,samples are prepared according to different compactness and different cement content,and the samples are saturated after curing for different times.The variation laws of physical and mechanical parameters such as maximum dry density,optimal moisture content of bank silt in natural state and permeability coefficient,compression modulus,cohesion and internal friction angle(triaxial UU test)in saturated state are analyzed.The results show that with the increase of cement content,the maximum dry density and optimal moisture content also increase.With the increase of cement content,age and compactness,the main physical and mechanical parameters increase,but their variation ranges have obviously different characteristics and regularity.This study provides theoretical data and basis for in-situ utilization of silt in Baigou river slope treatment.