考虑节理分布的内河港口大直径嵌岩灌注桩横向承载性能研究  

On the Lateral Bearing Behavior of Large-diameter Rock-socketed Cast-in-Place Piles at River Port

作　　者：黄建勇 王多垠[2] 汪承志[2] 

机构地区：[1]广西交通规划勘察设计研究院,广西南宁530011 [2]重庆交通大学河海学院

出　　处：《水运工程》2008年第3期59-63,共5页Port & Waterway Engineering

基　　金：重庆市自然科学基金计划重点项目(CSTC,2007BA6020)

摘　　要：内河港口岩质库岸的节理一般具有一定的分布度,在其上修筑大直径嵌岩灌注桩时需要考虑节理分布和桩承受的横向荷载,为研究不同节理分布度、角度时内河大直径嵌岩灌注桩的横向承载特性,在室内大比尺模型实验的基础上,建立考虑岩层节理分布的嵌岩桩数值分析模型。通过大量变动参数的数值计算,详细地探讨了影响嵌岩灌注桩横向承载性能的各种因素,这些因素包括襟边宽度、斜坡倾角、岩体性状、桩体的刚度,以及外荷载等。通过大量的算例比较,得到了节理与桩一体化工作特性及各种因素对嵌岩桩的横向承载性能的影响程度。The rock bank jointing of inland river port owns a certain distribution degree. When building large-diameter rock-socketed cast-in-place piles, the jointing distribution and lateral load of the pile shall be considered. In order to study the lateral bearing characteristics of large-diameter cast-in-place piles at river port under different jointing distribution degrees and angles, a numerical analyzing model of rock-socketed piles with the consideration of rock layer＇s jointing distribution is built on the basis of indoor large-scale model experiment. By this model, factors affecting the lateral bearing behavior of rock-socketed cast-in-place piles such as rake angle of slope, property of rock mass, stiffness of the pile are studied. Through the comparison of a large amount of computations, the jointing-pile integral working characteristics and degrees of influence of all factors on the lateral bearing capacity of rock-socketed piles are found out.

关 键 词：嵌岩灌注桩 襟边宽度 斜坡倾角 岩体性状 

分 类 号：U655.544.1[交通运输工程—港口、海岸及近海工程]