摘要
提出一种应用于河道边坡防护的生态护坡类型—生态组合桩护岸。为评估其在边坡生态防护中的应用效果,依托具体河道整治工程,开展应用该类型生态护坡的人工河道水质试验,以分析其净水效果。分别建立应用生态组合桩护岸的河道边坡(简称生态组合桩护岸边坡)及传统重力式混凝土挡土墙的河道边坡(简称挡土墙边坡)结构的三维数值模型,对这两种边坡的稳定性进行了比较分析。试验结果表明,应用所提出的生态组合桩护岸能够显著改善试验水箱中河水水质,其中氨氮、硝态氮、总磷和总氮的浓度以及高锰酸盐指数均有不同程度的降低。数值模拟结果表明,生态组合桩护岸边坡在距坡顶水平距离5 m处出现最大水平位移(1.2 mm)和最大沉降(1.8 mm),而挡土墙边坡在墙顶背水面处出现最大水平位移(9.1 mm),在挡土墙前趾处出现最大沉降(7.2 mm);生态组合桩护岸边坡在桩身中部处产生最大Mises应力(848 kPa),而挡土墙边坡在墙顶出现最大Mises应力(103 kPa)。总之,应用所提出的生态护坡类型进行河道边坡防护,具有较好的生态效应和边坡防护效果。
An ecological slope protection type-ecological combination pile revetment applied to river slope protection is proposed.To evaluate its application effect in ecological slope protection,based on a specific river regulation project,water quality tests were conducted in an artificial channel adopting this type of ecological slope protection to analyze its water purification effect.Three-dimensional numerical models of river slope with ecological composite pile revetment(referred to as ecological composite pile revetment slope)and river slope with traditional gravity concrete retaining wall(referred to as retaining wall slope)were established respectively,and the stability of the two slopes was compared and analyzed.Test results showed that the application of the proposed ecological composite pile revetment could significantly improve river water quality in the experimental tank,in which the concentrations of ammonia nitrogen,nitrate nitrogen,total phosphorus and total nitrogen,and permanganate index were reduced to varying degrees.Numerical simulations revealed that the maximum horizontal displacement(1.2 mm)and the maximum settlement(1.8 mm)of the ecological composite pile revetment slope appeared at the horizontal distance of 5 m from the top of the slope,whereas the retaining wall slope displayed the maximum horizontal displacement(9.1 mm)at the backwater side of the wall crest and the maximum settlement(7.2 mm)at the front toe of the retaining wall.The ecological composite pile revetment slope generated the maximum Mises stress(848 kPa)in the middle of the pile,while the retaining wall slope generated the maximum Mises stress(103 kPa)at the top of the retaining wall.Overall,the proposed ecological slope protection type demonstrated superior ecological and protective performance for river slope protection,integrating with the role of water purification and structural stability.
作者
施建业
刘依文
欧阳正平
曹骅
王亚洲
SHI Jianye;LIU Yiwen;OUYANG Zhengping;CAO Hua;WANG Yazhou(Yangzhou Survey Design Research Institute Co.Ltd.,Yangzhou 225007,Jiangsu China;Yangzhou Transportation Comprehensive Administrative Law Enforcement Detachment,Yangzhou 225000,Jiangsu China;Hainan Institute of Eco-Environmental Geological Survey,Haikou 570206,China;College of Intelligent Construction,Wuxi Taihu University,Wuxi 214063,Jiangsu China)
出处
《河南科学》
2025年第6期838-846,共9页
Henan Science
基金
中央高校基本科研业务费(B230205020)。
关键词
生态组合桩
生态护坡
净水效果
挡土墙
数值模拟
ecological combination pile
ecological slope protection
water purification effect
retaining wall
numerical simulation
