摘要
采用ABAQUS软件模拟山区河流港口工程斜坡嵌岩桩竖向承载工况,建模过程考虑斜坡钻岩成孔、桩混凝土浇筑、桩基承载等流程,考虑材料和桩岩接触非线性影响,建立斜坡-嵌岩桩系统三维模型,经斜坡坡度、桩径、桩嵌岩深度等参数分析,提出斜坡坡度对嵌岩桩竖向承载力的影响度,分析斜坡嵌岩桩的竖向承载特性。研究表明,斜坡坡度变化导致的桩前岩体缺失效应和桩后岩体增强效应将显著影响斜坡嵌岩桩的竖向承载力;在工程设计中,应综合考虑斜坡坡度、桩径和嵌岩深度等因素对斜坡嵌岩桩竖向承载能力的影响,经经济性和适用性比较,确定合理的设计参数。
ABAQUS,a finite element program,is selected to simulate vertical load condition of slope rock-socketed pile in port engineering in mountainous river.The modeling process includes drilling in rock slope,pouring pile concrete,bearing load condition of pile foundation etc.The nonlinear effects of material and pile-rock contact are taken into account when three-dimensional models of the slope rock-socketed pile system are established.Based on the analysis for parameters of slope angle,pile diameter and socketed depth etc,the influence degree of slope angle on vertical bearing capacity of rock-socketed pile is put forward,and the vertical bearing characteristics of slope rock-socketed pile are analyzed.The research results show that the vertical bearing capacity of slope rock-socketed pile is obviously affected by loss effect of rock mass before pile and enhancement effect of rock mass behind pile when the slope angle is changed.In engineering design,the influence of slope angle,pile diameter and rock-socketed depth on the vertical bearing capacity of slope rock-socketed pile should be considered comprehensively,and reasonable design parameters should be determined through the comparison of economy and applicability.
作者
王永艺
周世良
廖冬
WANG Yong-yi;ZHOU Shi-liang;LIAO Dong(.School of River and Ocean Engineering,Chongqing Jiaotong University,Chongqing 400074,China;Chongqing Southwest Research Institute for Water Transport Engineering,Chongqing Jiaotong University,Chongqing 400016,China;Chongqing Southwest Research Institute for Water Transport Engineering,Chongqing Jiaotong University,Chongqing 400016,China)
出处
《水运工程》
北大核心
2018年第3期166-172,177,共8页
Port & Waterway Engineering
基金
宁波市交通运输科技项目(201704)
关键词
山区河流
港口工程
斜坡
嵌岩桩
竖向承载
mountainous river
port engineering
slope
rock-socketed pile
vertical bearing
