摘要
竖铰接式生态直挡墙在中小河流中应用较广,为探明其破坏失稳机理,以Abaqus软件为平台,建立土坡—竖铰接式生态直挡墙有限元模型,得到的结论和建议:由于竖铰接式生态直挡墙一般用于浅基坑或边坡,几乎不会发生直接滑移或倾覆失稳;其主要破坏形式是砌块受土压力作用而产生位移,连接上下砌块的纤维棒受到剪力过大从而断裂,砌块之间失去连接整体性下降,最后砌块逐个掉落导致土坡无支护而失稳。可采用抗剪强度高的材质如碳纤维棒代替玻璃纤维棒,并采取措施增加相邻砌块之间摩擦力。
Vertical articulated ecological straight retaining wall is widely used in the middle and small rivers, in order to study its failure mechanism, based on Abaqus software platform, earth slope-vertical articulated ecological straight retaining wall FEM is established, and the following conclusions and suggestions are obtained： Because vertical articulated ecological straight retaining wall is generally used in shallow foundation pit or slope, there is nearly no direct slip or overturning instability. Its main damaging form is the block produces displacement by earth pressure, fiber rods connecting up and down blocks are broken when the shearing force is too large, then the blocks overall fall down due to the connection between the blocks is lost. Finally, the block drops one by one, resulting in soil slopes have no supports and become unstable. Materials with high resisting shear strength such as carbon fiber rods can be used to replace glass fiber rods, and some measures are took to increase the friction between adjacent blocks.
作者
苏慧
毛昆明
颜建
黄奕钧
SU Hui;MAO Kunming;YAN Jian;HUANG Yijun(Jinling Institute of Science and Technology,Nanjing 211196,Jiangsu;Lianyungang Urban Area Water Engineering Management Department,Lianyungang 222003,Jiangsu;Henan University,Kaifeng 475000,Henan)
出处
《江苏水利》
2018年第5期18-21,共4页
Jiangsu Water Resources
基金
江苏省水利厅科技项目(2016038)
江苏省科技厅自然科学基金面上资助项目(BK20141090)
南京市科委社会发展项目(201505018)
关键词
竖铰接式
直挡墙
破坏机理
数值分析
生态
vertical articulated
straight retaining wall
failure mechanism
numerical analysis
