摘要
为分析不同植被根系对土体抗剪强度参数的影响及对河堤岸坡加固效果的影响,本文对含香根草、百喜草、狗牙根、紫花苜蓿根系土体和裸地进行直接剪切试验,并基于FLAC3D建立河堤岸坡模型,研究了不同植被加固条件下岸坡安全系数。结果表明:4种植被均能显著增强土体抗剪强度,且香根草增强效果最明显,狗牙根增强效果最弱;植被根系对河堤岸坡加固效果明显,不同类型植被根系加固河堤安全系数为香根草>百喜草>紫花苜蓿>狗牙根>裸地。
In the paper,direct shear tests are carried out on the root system soil containing vetiver,bahia grass,cynodon dactylon and alfalfa root as well asbare soil in order to analyze the influence of root system of different vegetation on soil shear strength parameter and the influence on river levee bank slope. River levee bank slope model is established on the basis of FLAC3 D. The bank slope safety coefficient under different vegetation reinforcement conditions is studied. The results show that four vegetation categories can significantly enhance the soil shear strength,vetiver has the most prominent reinforcement effect,and cynodon dactylon has the weakest reinforcement effect. Vegetation root systems have prominent reinforcement effect on river levee bank slope. The safety coefficient of different vegetation root systems on river levee reinforcement isvetiver > bahia grass > alfalfa root > cynodon dactylon > bare land.
出处
《中国水能及电气化》
2017年第9期40-43,共4页
China Water Power & Electrification
关键词
植被根系
岸坡加固
效果
vegetation root system
bank slope reinforcement
effect
