采用低位真空预压技术在东钱湖加固淤泥基础的实践

The application of low digit vacuum prepress technology in the silt foundation reinforced of Dongjian Lake

一般对淤泥采用真空预压方法进行淤泥固结,直接对湖区淤泥进行低位真空预压的实例还没有,鉴于低位真空预压方法在工期和造价方面的优势,本次试验对东钱湖环保疏浚产生的弃泥进行低位真空预压处理。低位真空预压由疏浚吹填、铺设土工布与竹笆、人工插塑料排水板、铺设水平管网、吹填泥封层、真空预压等一系列程序组成,经过试验期间对沉降量和孔隙水压力的观测和试验结束后对现场地基土的静力触探和十字板检测试验,证明地基土在经过70天左右的抽真空预压,达到了60kPa的预期承载力,结果也很好地验证了在宁波东钱湖地区的地质条件下实施低位真空预压的可能性。

The vacuum prepress usually be used to concrete the silt,no practice using low digit vacuum prepress to treat the silt in lake area, whereas the advantage of the low digit vacuum prepress in construction and cost,its experiment is applied to treat the silt produced by dredge up in the Dongjian Lake.It is comprise of fill,pave geotextile and bamboo basketry,artificial insert plastic drain sheet,pave horizontal pipe network,fill mud seal,vacuum prepress.During the experiment the settlement and pore water pressure are measured and after the experiment the static probe and cross board inspection prove the foundation bearing capacity can arrive at 60KPa after 70 days vacuum prepress.