Matlab图像处理技术研究单支盘桩工作机理  

Working Mechanism Research of Single Branch Pile by Digital-image-processing Technique of Matlab

作　　者：王红飞[1] 钟小春[1] 叶文龙[1] 

机构地区：[1]河海大学土木与交通学院,南京210098

出　　处：《科学技术与工程》2014年第27期116-121,共6页Science Technology and Engineering

摘　　要：挤扩支盘灌注桩是在直桩的基础上,通过在适宜的土层加设承力盘而形成的一种变截面桩。目前,理论上对支盘桩的研究尚不够成熟,对其荷载的传递特性和承载机理等方面的问题存在不同见解。进行单支盘桩的模型试验,其荷载-沉降关系表明单支盘桩的前期沉降较小;运用MATLAB图像处理工具箱,编制图像分析程序,处理试验过程中拍摄的照片,得到模型桩周围土体的变化情况,根据土体变化,分析支盘桩受力情况,结果表明,支盘桩工作过程可分为三个阶段:桩侧摩阻力承载大部分荷载阶段、支盘承载大部分荷载阶段、支盘下土体发生剪切破坏后桩端阻力承载大部分荷载的阶段。Squeezed branch pile is developed from straight piles; this kind of pile has various sections formed by constructing some load-carrying plates in the suitable soil layers around the pile. So far,the theoretical study on the single pile is still immature,and there are still different opinions on the load transmission character and the bearing capacity mechanism of it. The model test of single branch pile was conducted,the load-settlement relationship that gained from the test showed that early settlement of the single branch pile is small; based on the image processing toolbox of MATLAB,the image analysis program was wrote to analyze the changes in the soil that around the model pile,then research the work mechanism of single branch pile according to the changes the results showed that the working process of the pile could distributed into three stages： friction around the pile bearing most of the load,branch bearing most of the load and resistance of the pile tip bearing most of the load after the soil under the branch been sheared failure.

关 键 词：挤扩支盘桩 数字图像技术 承载机理 

分 类 号：TU473.1[建筑科学—结构工程]