预应力管桩锤击沉桩破坏原因分析  

Damage mechanism of prestressed pipe piles during hamming

作　　者：钱祖宾[1] 沈建霞[2] 单海春[1] 

机构地区：[1]江苏省水利勘测设计研究院有限公司,江苏扬州225009 [2]江苏省交通科学研究院股份有限公司,江苏南京210017

出　　处：《水运工程》2016年第2期153-158,共6页Port & Waterway Engineering

摘　　要：锤击法是预应力管桩沉桩施工常用的方法,但在沉桩过程中,桩体破损现象时有发生。针对锤击沉桩过程所暴露的桩头破碎、桩身断裂以及桩身竖向开裂等问题,从桩体受力的角度进行分析和探讨,并就预防沉桩破坏提出了相应措施和建议,以便为今后的预应力管桩设计和沉桩工艺的选择提供参考。Hamming is a commonly used pile-driving method for precast piles. However, during pile driving, piles are easily to be damaged such as pile top broken, pile breakage or cracking. Based on the analysis of the structural stress, we get to know the failure mechanism and propose relevant measures and suggestions, to serve as reference for the design of pre-stressed pipe piles and selection of pile driving technologies.

关 键 词：锤击法 撞击力 内壁摩阻力 摩阻力超载 超空隙水压力 超固结土压力 

分 类 号：TU473[建筑科学—结构工程]