大厚度吹填泥固结沉降计算分析

Consolidation Settlement Calculation and Analysis on Large Thickness Hydraulic Fill Mud

大厚度吹填泥的现场取样困难,很难确定沉降计算指标。该文以大面积大厚度吹填泥的真空预压处理为依托,采用密度20m×20m网格布置静力触探测点和沉降观测点,确定网格节点的比贯入阻力p_s值和沉降值。基于地层的p_s值确定压缩模量后,采用分层总和法计算沉降量,并将现场观测的沉降曲线与预测的沉降值进行比较,验证了基于p_s值确定吹填泥压缩模量值的可靠性。

It is difficult to sample the large thickness hydraulic fill mud on site,and it is difficult to determine the settlement calculation index.In this paper,based on the vacuum preloading treatment of a large area and large thickness hydraulic fill mud,the 20 m×20 m density grid is used to arrange the static penetration points and settlement observation points to determine the value of specific penetration resistance p_s and settlement of grid nodes.After the compression modulus is determined based on the p_s value of the stratum,the settlement is calculated by the method of layered summation,and the settlement curve observed in the field is compared with the predicted value,the reliability of determining the value of compression modulus of hydraulic fill mud based on p_s value is verified.