板桩悬臂长度对护岸变形及稳定性的影响研究  

Research on effect of cantilever length of sheet pile on deformation and stability of revetment

作　　者：王福喜[1,2] 陈龙[1,2] 刘旭[1,2] 

机构地区：[1]河海大学岩土工程科学研究所,江苏南京210098 [2]河海大学岩土力学与堤坝工程教育部重点实验室,江苏南京210098

出　　处：《河北工程大学学报（自然科学版）》2017年第2期37-42,共6页Journal of Hebei University of Engineering:Natural Science Edition

基　　金：水利部公益性行业科研专项项目(201501043);浙江省交通厅科技计划项目(2013W02)

摘　　要：以杭平申线航道平湖段升级改造工程为依托,基于有限元程序,考虑老护岸影响,对不同悬臂长度的板桩护岸进行清淤试验模拟,对比分析不同悬臂长度的板桩护岸有限元计算的水平位移、板桩内力、及其护岸稳定性,同时分析研究不同入土深度条件下悬臂长度对板桩护岸的影响规律。结果表明:考虑老护岸作用下,在板桩与老护岸的重叠区域,板桩的悬臂长度对护岸的变形破坏趋势有较大影响,但对板桩的内力影响很小,板桩悬臂长度的减小有助于护岸的稳定性,但当板桩顶端低于老护岸底端时,随着悬臂长度的减小,整体稳定性安全系数FOS开始减小,并且随着入土深度的增加,悬臂长度对护岸稳定性的影响越小。Based on Hang-Ping-Sheng line waterway upgrading project in Pinghu City, considering effect of old revetment, the simulating the dredging experiment of sheet pile revetment with different cantilever length of sheet pile is implemented by the finite element software, then the comparative analysis is conducted for the horizontal displacement, internal stress and stability of revetment of sheet pile revetment with different cantilever length of sheet pile. In addition, the study of influence rule of cantilever length on sheet pile revetment is extended under the condition of different embedded depth. The results show that cantilever length of sheet pilehas obvious influence on deformation and trend of failure of revetment in the overlapping region of sheet pile and old revetment, but it has a very little influence on internal stress of sheet pile. In the overlapping region, the decreasing of cantilever length of sheet pile is conducive to stability of revetment, but when the top of sheet pile is lower than the bottom of old revetment, with the decreasing of cantilever length of sheet pile, the global stability safety factor FOS begins to decrease gradually, and with the increasing of embedded depth, the effect of cantilever length on stability of revetment becomes weaker.

关 键 词：老护岸 悬臂长度 水平位移等值线 入土深度 稳定性 

分 类 号：TV861[水利工程—水利水电工程]