堆载预压法在处理灰堤软土地基中的应用

Application of Preloading Method to Treatment Soft Soil Ash Dike Foundation

通过分析研究软土地基的特点、常用软土地基处理方案的优缺点、堆载预压法的机理和计算方法 ,发现堆载预压法施工简单、价格低廉,是处理软土地基的理想方案。但也有处理周期长、地面沉降大的缺点。而灰场贮灰周期长,灰堤和堆灰体均为柔性结构的特点,正好克服了堆载预压法的缺点,故堆载预压法是最适宜的处理灰堤软土地基的方法。以东南亚某国灰场为例,用数据说明了堆载预压法的主要计算,并通过方案比较,定量地显示了堆载预压法处理软土上灰堤地基的巨大优势。

Based on study on characters of soft soil, advantage and disadvantage of common foundation treatment scheme, mechanism and calculation method of heaped preloading, it is discovered that heaped preloading with PVD is reasonable scheme to treat soft soil under ash dike, because it has the advantage of easy construction and low cost. But it also has the disadvantage of long period and large ground settlement difference. For ash dike, long storage period of ash makes up the defect of long treatment period of heaped preloading method. The ability to adapt large uneven ground settlement of ash dike can deal with the problem of large ground settlement difference of the treatment because the ash dike is the granular flexible structure, so it is the most appropriate method. Citing the soft soil foundation treatment of ash dike by heaped preloading with PVD in one foreign country in Southeast Asia, the calculation method of heaped preloading is illustrated and the great advantage of heaped preloading is shown.