挤扩支盘桩的试验研究

Test and Study on Compaction Pile with Expanded Branches and Plates

挤扩支盘桩是近年开发出来并已投入使用的一种新桩型 ,在我国河南、河北、山东等地应用较多 ,并取得了很好的经济效益。本文介绍了挤扩支盘桩的成桩方法和工作原理 ,通过对试验桩桩周土的开挖取样做室内土工试验 ,得出挤扩分支盘挤压应力对桩周土挤密效应所引起的土干密度的变化规律 。

Compaction pile with expanded branches and plates is a new type of pile which has been developed recently and being used widely in Heman,Hebai and Shandong provinces in China with good economic benefit.The construction process and working principle of the said pile are introduced herein.The concept of synthetic influential factor by extrusion effect and relevant problems which should be noticed in designing are proposed after the variation rule of dry density of soil around the pile induced by extrusion effect is achieved.