超软土浅层加固技术中排水板间距现场试验研究

以珠海高栏港区某吹填超软土浅层处理工程为依托工程，设立了排水板不同间距的试验区，通过现场监测与检测，从真空度、沉降量和土工试验参数等指标分析了排水板间距对加固效果的影响，得到如下结论：1）排水板间距越小，受施工扰动的影响最大，其加固效果并非最优；2）经试验比较，排水板间距为0.8 m为最优方案；3）浅层加固后，地表硬壳层厚度至少为40 cm，满足后续施工需求。

Field test study on PVD spacing of shallow ultra-soft soil improvement

Based on a project on shallow ultra-soft soil improvement in Gaolan seaport area in Zhuhai seaport, a field test trial area with different spacing of PVD was prepared. By field monitoring and testing, the impaction of PVD spacing on the soil improvement effect was analyzed in terms of the vacuum, the settlement and the geotechnical test parameters. It is concluded that: 1) When the PVD is constructed with a smaller spacing, the construction disturbance is bigger among the PVDs, but the improvement effect is not optimum; 2) According to the experiment and comparison, the optimum spacing of PVD is 0.8 m for this project; 3) After soil improvement, the thickness is more than 40 cm, satisfying the requirement of follow-up construction.