生态型河道演变机理及护岸材料性能试验研究  

Experimental study on the evolution mechanism of ecological river channel and the performance of bank protection materials

作　　者：王丽秋 WANG Liqiu(Chaoyang Tianhao Water Conservancy Construction Co.Ltd,Chaoyang 122000,China)

机构地区：[1]朝阳天浩水利建筑有限公司,辽宁朝阳122000

出　　处：《水科学与工程技术》2024年第2期87-89,共3页Water Sciences and Engineering Technology

摘　　要：为解决生态型河道的水沙输移多变、河道侵蚀冲刷和生态退化等问题,以辽宁省朝阳市大凌河下游为研究对象,研究生态型河道的径流量变化规律及河道演变机理,提出一种秸秆纤维改良固化黏土的生态护岸材料,并对其进行抗剪切强度室内试验。结果表明,随着法向应力的增加,不同养护龄期的秸秆纤维改良固化黏土试样的抗剪切强度均呈现线性增加的变化趋势;在相同的养护龄期时,不同秸秆纤维掺入量的试样抗剪切强度均随法向应力的增加呈现线性增加的变化趋势,随着秸秆纤维掺入量的增加,秸秆纤维改良固化黏土试样的抗剪切强度呈现先增加后减小的趋势;应用实践表明秆纤维改良固化黏土砌块能够快速促进河岸植被群落的恢复,护岸效果明显,且其抗剪强度较高,能够抵御中等及严重程度的水流侵蚀。In order to solve the problems of variable water and sediment transport,erosion and ecological degradation in ecological river channels,the lower reaches of Daling River in Chaoyang City,Liaoning Province were taken as the research object to study the changes in runoff and river evolution mechanism of ecological river channels.A straw fiber modified and solidified clay ecological bank protection material was proposed,and its shear strength was tested indoors.The results showed that with the increase of normal stress,the shear strength of straw fiber modified solidified clay samples at different curing ages showed a linear increasing trend.At the same curing age,the shear strength of samples with different amounts of straw fibers showed a linear increasing trend with the increase of normal stress.As the amount of straw fibers added increased,the shear strength of straw fiber modified solidified clay samples showed a trend of first increasing and then decreasing.Application practice has shown that straw fiber modified solidified clay blocks can quickly promote the restoration of riverbank vegetation communities,with significant bank protection effects and high shear strength,which can be lower than moderate and severe water erosion.

关 键 词：生态型河道 演变机理 护岸材料 室内试验 水砂特性 

分 类 号：TV147[水利工程—水力学及河流动力学]