高真空击密法在吴江软基处理工程中的应用

Application of Soft Soil Foundation Treatment with High Vacuum Densification Method in Wujiang Area

针对吴江地区新建道路软土地基地质情况与处理要求,采用高真空击密法进行了加固试验研究。对试验过程中场地的静力触探、静载荷试验处理效果以及沉降、超孔隙水压力的监测结果进行了分析。试验研究结果表明,经过高真空击密处理后的地基强度有了大幅度的提高,对于浅层土体(1.5 m之内)而言,处理效果更加明显,处理后地基承载力满足一般路基的承载力和刚度使用要求。该结论为长江三角洲地区类似软土地基处理提供了借鉴。

According to conditions of the soft foundation for the new-bulit road in Wujiang area.A new High Vacuum Densification Method（HVDM） was introduced.To examine the proposed method,the outcome of static cone penetration test,plate load test were analyzed,and the monitoring data for the settlement of soft foundation as well as excess pore water pressure were discussed.The test results indicate that the foundation intensity are improved obviously by using HVDM,especially for shallow soil layer,and the foundation bearing capacity after treating satisfies the capacity and rigidity operating requirement of general subgrade.It is revealed that HVDM is appropriate for treating such a kind of soft soil in Yangtze River Delta region.