挤扩灌注桩承载力计算公式的探讨

A Method for Calculation of the Bearing Capacity of Cast-In-Situ Piles with Expanded Branches and Plates

通常挤扩灌注桩的承载力包括总极限侧阻力以及总极限桩端阻力,即把土对承力盘的作用也按极限桩端阻力计算,但这些都是简化的经验计算。而本文所提出的承载力计算公式是根据土的抗剪强度来计算土对承力支盘的作用,符合土力学原理,实例验算表明,本文方法计算值跟实测值比较吻合,具有一定的工程实用价值。

Beating capacity of Cast-in-situ piles with expanded branches and plates includes the utmost load transfer of the resistance around both the pile and the pile end and the bearing capacity of the branches and plats is included calculate also in the utmost load transfer of the resistance of the pile end. So this method is a simplified estimation based on experiences. A new method about how to calculate the beating capacity of the branches and plats is presented, which is based on the sheafing strength and the theory of soil mechanics. Example shows that it is reasonable and useful.