“双灰桩”加固既有建筑物饱和黄土地基研究

The Study on Strengthen Saturated Loess Under the Existing Building by Flyash-lime Piles

对“双灰桩”加固既有建筑物饱和黄土地基进行了研究 .该方法对地基的加固机理包括以下几方面 :成孔挤密作用 ;吸水、升温和膨胀挤密作用 ;胶凝、离子交换及碳化作用 ;置换作用 ;侧向约束作用 .运用模型试验方法对加固机理进行了定性研究 ;并结合实际工程 ,通过室内试验、现场测试及观察 ,对其加固效果进行了分析和评价 .

The paper studies the problems on Strengthen Saturated Loess which supports existing building by flyash lime piles.Mechanism of strengthening is studied by model test method. The effects of this method is analyzed and evaluated by laboratory test,field measurement and observation of actual engineering.The results can provide a reference for foundation improvement to similar engineering.