低位高真空分层预压击密法加固软土地基试验

Test on Soft Soil Foundation Reinforcement by Low-Level and High-Vacuum Stratified Preloading and Compaction Method

为研究低位高真空分层预压击密法对软土地基进行加固的效果,选取了某道路段进行试验。根据现场监测资料和处理后的静力触探原位测试进行分析后,发现应用该方法可以大幅度提高软土地基的承载力,且加固影响深度能到达排水板底端以下1.7 m。同时,通过采取以地面变形控制开泵速度和填充捣实水平裂隙的技术措施,成功地将水平变形控制在安全范围,其成果可为类似工程提供借鉴。

To study the reinforcement effect of low-level and high-vacuum stratified preloading and compaction method,a road section is selected for test.Based on the field monitoring data and the in-situ test of static penetration after treatment,it is found that use this method can greatly improve the bearing capacity of soft soil foundation,and the influence depth of reinforcement can reach 1.7 m below the bottom of drainage plate.At the same time,the horizontal deformation is successfully controlled in the safe range by adopting the technical measures of controlling pump opening speed by ground deformation and filling and tamping horizontal cracks.The results can be used as reference for similar projects.