软黏土路基现场强夯置换试验分析

Experimental Analysis of Dynamic Compaction Replacement for Soft Clay Roadbed

为确定软黏土路基强夯施工参数,本文依托实际工程,对某公路软黏土地基进行强夯试验分析,并采用路基加固检测方法对强夯前后效果进行了评价。研究结果表明:本工程拟定的强夯施工参数为单夯能量第一遍为800 k N·m、第二遍为1 400 k N·m,夯击次数第一遍为夯击5次,第二遍为夯击6次。拟定的各夯实参数最终的夯实结果满足设计要求,能对本工程7 m深度的软黏土进行有效夯实。研究结果可为类似软黏土强夯置换工程提供借鉴和指导。

In order to determine the construction parameters of dynamic compaction in soft clay subgrade,based on the actual project,the dynamic compaction test of soft clay subgrade in a highway was carried out,and the effects before and after dynamic compaction was evaluated by the method of subgrade reinforcement detection. The results show that the parameters of dynamic compaction are 800 k N m for the first time,1 400 kN m for the second time,5 times for the first time and 6 times for the second time. The final tamping effect of the proposed tamping parameters meets the design requirements and can effectively tamp the soft clay at the depth of 7 m in this project. The research results can provide reference and guidance for similar soft clay dynamic compaction replacement projects.