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在膨胀性粘土中最有效的地基和基础设计方法之一,是采用不同结构的桩全部或部分地穿过膨胀土层。对普通打入钢筋混凝土桩的特性进行了最充分的研究。但是,当作用于基础上的压力和上拔力很大时,使用这种桩在经济上是不合理的。扩底钻孔灌注桩具有较高的承载力,并能大大减少基础的垂直位移。这种桩的工作以及它的计算和设计方法具有某些特点。
One of the most effective foundations and foundation design methods in expansive clays is to use differently constructed piles to fully or partially pass through the expansive soil layer. The most thorough research has been conducted on the characteristics of ordinary reinforced concrete piles. However, the use of such piles is economically unreasonable when used as a basis for pressure and pull-out forces. Expanded bored cast-in-place piles have higher bearing capacity and can greatly reduce the vertical displacement of the foundation. The work of this pile and its calculation and design methods have certain characteristics.