水平荷载下基于桩-土相互作用的定位桩承载能力  

Bearing Capacities of Positioning Pile Under Lateral Loads Based on Pile-Soil Interaction

作　　者：陶鹏 杨启[2,3] 程旭东[4] 金晔 

机构地区：[1]中国舰船研究设计中心,武汉430064 [2]上海交通大学高新船舶与深海开发装备协同创新中心,上海200240 [3]上海交大海洋水下工程科学研究院有限公司,上海200231 [4]中国铁建港航局集团有限公司,广东珠海519070

出　　处：《中国海洋平台》2017年第5期55-61,共7页China offshore Platform

基　　金：工信部高技术船舶科研计划项目(工信部联装[2012]539号);国家自然科学基金项目(51179104)

摘　　要：研究挖泥船定位桩在桩顶水平载荷下的承载特性,引入p-y曲线描述桩-土界面的非线性接触,分别基于连续算法及微元法建立桩-土相互作用下的定位桩"梁"力学模型,对其桩身内力及位移分布进行探讨。实例表明,桩细长比、土体特性以及桩基深度等对定位桩承载能力都有较大的影响。在作业区域土体性质确定的情况下,可通过增加桩径及定位桩插桩深度来提高定位桩水平极限承载能力。Bearing properties of the positioning pile under lateral load is studied,and the p-y curve is introduced to describe the nonlinear contact interface between pile and soil.The beam mechanical model of positioning pile considering pile-soil interaction is presented based on continuation algorithm and differential method respectively.Both of the inner-force and displacement distribution of pile are discussed.The examples show that the slenderness ratio of pile,the soil characteristics and the depth of pile foundation have great influence on bearing capacity of positioning pile.With the soil type determined in the working area,the horizontal ultimate bearing capacity of the positioning pile can be improved by increasing the diameter of pile and the depth of pile foundation.

关 键 词：水平载荷 定位桩 桩-土分析 承载能力 P-Y曲线 

分 类 号：U616[交通运输工程—船舶及航道工程]