码头工程PHC管桩施工工艺及承载力特性分析  

Analysis on Construction Technology and Bearing Capacity Characteristic of PHC Pipe Pile in Wharf Engineering

作　　者：沈艳林 SHEN Yanlin(The First Construction Company of CCCC Second Harbor Engineering Co.,Ltd.,Wuhan 430056,Hubei,China)

机构地区：[1]中交二航局第一工程有限公司,湖北武汉430056

出　　处：《工程技术研究》2025年第3期42-44,共3页Engineering and Technological Research

摘　　要：文章以武汉市某码头桩基工程为依托,介绍了预应力高强度混凝土(pre-stressed high-strength concrete,PHC)管桩的施工流程,总结锤击沉桩、接桩、送桩、截桩、桩端封堵等主要工序的施工技术。选取SZ1~SZ4试桩开展静载试验,分析了PHC管桩极限承载力的影响因素及桩身轴力分布规律。研究结果表明,PHC管桩壁厚对单桩极限承载力的影响最为显著,桩端持力层的影响次之,桩周软土厚度的影响最小;SZ5桩身上部分布的软土层较厚,下部分布的软土层较薄,随着深度的增加,SZ5桩身轴力先迅速减小,随后减小速率放缓,直至为0。Based on the pile foundation engineering of a wharf in Wuhan,this paper introduces the construction process of pre-stressed high-strength concrete(PHC)pipe pile,and summarizes the construction technology of the main procedures such as hammer piling,pile extension,pile follower,pile cutting and pile end plugging.SZ1-SZ4 test piles are selected to carry out static load test,and the influencing factors of ultimate bearing capacity of PHC pipe pile and the distribution law of axial force of pile body are analyzed.The results show that the wall thickness of PHC pipe pile has the most significant influence on the ultimate bearing capacity of single pile,the influence of pile end bearing stratum is the second,and the influence of soft soil thickness around the pile is the least;the soft soil layer distributed in the upper part of the SZ5 pile body is thicker,and the soft soil layer distributed in the lower part is thinner,with the increase of depth,the axial force of the SZ5 pile body decreases rapidly at first, and then the decrease rate slows down until it is 0.

关 键 词：码头工程 PHC管桩 静载试验 

分 类 号：TU473.1[建筑科学—结构工程]