预应力水冲桩抗裂性能研究分析  

Investigation of crack resistance of prestressed hammer-driven piles aided by water jetting

作　　者：汪海生[1] 

机构地区：[1]安徽省港航勘测设计院,安徽合肥230011

出　　处：《合肥工业大学学报（自然科学版）》2007年第8期1045-1048,共4页Journal of Hefei University of Technology：Natural Science

摘　　要：某码头工程下部结构采用预应力水冲锤击桩,试桩过程中发现,在贯入度较大的情况下桩身多处产生横向裂缝,使桩尖无法达到设计标高。为分析产生裂缝原因,通过静荷载试验的方法检验桩身的抗裂性能;结果表明张拉控制应力未达到设计值,是导致桩身产生环向裂缝的主要原因;提出适当调整预应力,能够有效地解决预应力水冲桩桩身裂缝的问题。The prestressed hammer-driven piles aided by water jetting were used as the substructure of a wharf, and transverse cracks were observed in the bodies of the five test piles. In order to analyze the crack reason, static load experiments were made on three prefabricated piles to examine the crack resistance of the piles. The results show that the tension stress which was less than the designed value is the main reason of the cracks. Then the prestress of the piles was adjusted to the designed value in prefabrication,and good effect was achieved.

关 键 词：预应力 水冲沉桩 静荷载试验 抗裂性能 

分 类 号：TU753.3[建筑科学—建筑技术科学]