一种新型竹材生态护岸型式及其稳定性模拟分析

Analysis on a new type of bamboo ecological bank revetment and its stability simulation

本文以济南创新谷小刘河山区河流段为研究区域,提出一种竹材式柔性锚固框架生态护岸结构,并对该结构进行稳定性模拟分析,旨在确定新型竹材生态护岸所能发挥最佳锚固作用的合适工况。研究通过ABAQUS有限元软件进行强度折减计算,将竹筋模拟为“锚固杆”的部件作用于边坡,模拟不同的坡角、土质类型对于边坡模型稳定性的影响。数值模拟计算结果表明:新型竹材护岸锚固框架结构可有效地对粉质黏土边坡和黄棕壤土边坡进行锚固。随着坡度的增加,竹筋深层锚固作用效果愈加明显,安全稳定性能得到了稳定的提升。其中60°边坡锚固后效果最佳,两种土质边坡的塑性应变与位移均减小近100%。

In this paper,a bamboo flexible anchoring frame ecological bank revetment structure is proposed based on the river section of Xiaoliuhe Mountain area in Xingexigu,Jinan,and its stability is simulated and analyzed to determine the optimal conditions of the new bamboo ecological bank revetment.In this study,ABAQUS finite element software is used to calculate the strength reduction,and bamboo bars are simulated as“anchor rod”components to act on the slope,so as to simulate the influence of different slope angles and soil types on the slope model stability.The results of numerical simulation show that the new structure can effectively anchor the silty clay slope and the yellow-brown loam slope.With the increase of slope,the deep anchorage effect of bamboo bars becomes more and more obvious,and the safety and stability performance is improved steadily.The 60°slope has the best anchoring effect,and the plastic strain and displacement of both soil slopes decrease by nearly 100%.