水位变动对框架码头排架桩弯矩影响试验研究  

The Effect of Water Level Change to Bending Moment at Slope Frame-dock Pile

作　　者：简富献 张强[2] 姬雪竹 王鹏[1] 吴晓[2] 

机构地区：[1]重庆交通大学,国家内河航道整治工程技术研究中心,重庆400074 [2]重庆交通大学水利水运工程教育部重点实验室,重庆400074

出　　处：《科学技术与工程》2016年第7期275-280,共6页Science Technology and Engineering

基　　金：重庆市教委科学技术研究项目(KJ130412)资助

摘　　要：为探究岸坡后方水平作用力下水位变动时排架桩体弯矩沿桩身变化规律,试验设置7组水位变动方案,在后方40KN水平均布荷载作用下测定桩身应变;并分析弯矩变化。结果表明,与水位上升相比,水位下降时A桩弯矩平均增量最大,为24.20 N·m;D桩弯矩平均增幅最大,为22.76%;C桩弯矩减小。距坡肩较近的A桩与B桩桩身弯矩随水位升高而减小,距坡脚较近的D桩桩身弯矩随水位降低而减小,中部C桩弯矩变化规律不明显。水位上升时各桩身弯矩曲线变化形状与下降时一致,水位变动并没有改变排架结构中桩体弯矩沿桩身分布曲线的形状,但影响弯矩数值大小。In order to investigate the effects of water level variation to bending moment of frame-dock pile,7tests of different water level variation were tested,in the condition of keeping with distributed load of 40 k N. Based on the tests,bending moment of the piles were analyzed. Results show that compared to water level rising,the most average increment of bending moment,24. 20 N·m,is the A pile during water level falling. The most average amplitude of bending moment,22. 76%,is the D pile. Then the bending moment of # C pile is decreasing. Fuether,the bending moment of #A and #B,near the slope shoulder,are decreasing with the water level increasing. But it is opposite to #D pile,near the slope toe,which is augmenting with the water level increasing. The bending moment of C pile,located in the central,is influenced by the water level variation rarely. All the curves have the alike shapes approximatively along with water level rising and falling. So water level promotion and demotion do not change the shapes of those curves,but have effect on the size of bending moment of each pile.

关 键 词：水位变动 桩身弯矩 水平作用力 排架桩 

分 类 号：U656.124[交通运输工程—港口、海岸及近海工程]