开口钢管桩桩基承载力桩端部分计算方法探讨

港口工程类设计规范中未明确给出开口钢管桩的桩基承载力计算方法，设计中常参考JGJ 94—2008。建立桩周全部土体与钢管桩蔽塞效应间的关系，并通过实际工程试验加以验证，为开口钢管桩桩基承载力桩端部分计算方法提供新的思路。解决了“JGJ 94—2008《建筑桩基技术规范》中给出的，桩基承载力计算方法中对桩端蔽塞效应系数的计算仅考虑桩端进入持力层的深度，而忽略了持力层以上土体对桩端蔽塞的影响”的问题。

Calculation method for vertical bearing capacity of open-type steel cylinder pile

Referring to the standard of harbor engineering,the calculation method for the vertical bearing capacity of the open-type steel cylinder pile is not very explicit.So designers often refer the Technical Code for Building Pile Foundations(JGJ 94—2008).We propose a new calculation method for the effect of blockage,which is verified by a practical engineering,so as to solve the problems of the standard JGJ 94—2008 Technical Code for Building Pile Foundations in that it considers only the depth into the bearing course and ignores the blockage effect of the overlying bed.