交联聚苯乙烯-植物联合护坡技术对黄土陡坡的控蚀效果  

Erosion Control Effect of Cross⁃Linked Polystyrene⁃Plant Joint Slope Protection Technology on Loess Steep Slopes

作　　者：姚忠劭 李明俐 钟玉健 王徐 陈逸杰 YAO Zhongshao;LI Mingi;ZHONG Yujian;WANG Xu;CHEN Yijie(College of Environment and Civil Engineering,Chengdu University of Technology,Chengdu 610059,China)

机构地区：[1]成都理工大学环境与土木工程学院,四川成都610059

出　　处：《人民黄河》2024年第8期123-129,共7页Yellow River

基　　金：国家自然科学基金资助项目(42107179);地质灾害防治与地质环境保护国家重点实验室自主研究课题(SKLGP2021Z021)。

摘　　要：随着经济社会的发展,各类基础设施建设使黄土高原地区产生了许多高陡边坡,为了给黄土陡坡的修复及土壤侵蚀控制提供参考,基于野外原位小区观测及人工模拟降雨试验结果,分析了新型有机材料交联聚苯乙烯(CLPs)与植物联合护坡技术对黄土陡坡的控蚀效果及机理等,结果表明:1)采用CLPs对黄土坡面进行处理后,在相同的降雨情况下,其径流深比裸露坡面的大、产沙量与裸露坡面的相当,即仅采用CLPs对黄土坡面进行处理基本无控蚀作用;2)采用CLPs-植物联合护坡技术的CLPs-草灌坡面与CLPs-草皮坡面,径流深远小于传统草灌坡面和鱼鳞坑植灌木坡面的,土壤侵蚀模数远远小于传统草灌坡面和鱼鳞坑植灌木坡面的,年均土壤侵蚀模数仅为传统草灌坡面和鱼鳞坑植灌木坡面的0.9%~3.2%,即CLPs与植物联合对黄土坡面进行防护的控蚀效果显著;3)植被覆盖度为100%的CLPs-草灌联合修复坡面与无植被覆盖的CLPs护坡坡面相比,坡面径流的流速、雷诺数、弗劳德数、剪切力、功率显著减小,坡面阻力系数、糙率系数显著增大,这是CLPs-草灌联合护坡技术控蚀的水动力学机理;4)采用CLPs-植物联合护坡技术,可使黄土陡坡形成有效的土体加固体系、控蚀体系和保水体系。With the development of economy and society,various types of infrastructures have produced many high and steep slopes in Loess Plateau areas.In order to provide references for the restoration of loess steep slopes and soil erosion control,based on the results of field in-situ plot observation and artificial simulated rainfall tests,the erosion control effects and mechanisms of the new organic material crosslinked polystyrene(CLPs)is the plant joint slope protection technology on the loess steep slopes were analyzed.The results show that a)the runoff depth of the loess slope treated with CLPs is larger than that of the bare slope under the same rainfall condition,and the sand production was comparable with that of the bare slope under the same rainfall conditions,there is basically no erosion-control effect of treating loess slopes only with CLPs;b)The CLPs-grass and shrub slopes and CLPs-turf slopes using CLPs-vegetation co-remediation technology,the runoff depth and soil erosion modulus were much smaller than that of traditional grass-shrub slopes and fish-scale pits planted shrub slopes,and the annual average soil erosion modulus is only 0.9%-3.2%of that of traditional grass-shrub slopes and fish-scale pits planted shrub slopes,this means that the erosion control effect of CLPs and plants on loess slopes is remarkable;c)Compared with the CLPs protection slopes without vegetation cover,the CLPs-grass and shrub joint restoration slopes with 100%vegetation coverage show a significant decrease in runoff flow rate,Reynolds number,Rroude number,shear force,and power,and a significant increase in slope resistance coefficient and roughness co-efficient,which is the hydrodynamic mechanism of the CLPs-grass and shrub joint slope restoration technology for erosion control;d)Using CLPs-vegetation slope protection technology,an effective soil reinforcement system,erosion control system and water retention system can be formed on the loess steep slopes.

关 键 词：有机材料 交联聚苯乙烯 植物 护坡 土壤侵蚀 原位观测 人工模拟降雨试验 黄土陡坡 

分 类 号：S157.1[农业科学—土壤学]