植物根系加筋土剪切试验研究综述

植被护坡作为一种有效兼顾生态环境保护及边坡治理的护坡技术,在工程实践中得到了广泛的推广和应用。然而植被护坡技术的研究成果却滞后于工程应用。文章结合国内外对于植物根系加筋土剪切试验的成果,根据试验土样及方法的不同,将植物根系加筋土试验分为原状根系加筋土直接剪切试验、原状根系加筋土三轴剪切试验、重塑根系加筋土三轴剪切试验以及重塑加筋土直接剪切试验等四类,分别介绍了上述试验的试验方法、试验工况,并总结分析了根系对于土体抗剪强度的增强作用、根系加筋土强度在各工况组合下的变化规律,指出了存在的问题及后续开展研究的方向,以期为后续植物根系加筋土剪切试验的开展提供一定的参考。

Review of shear test investigation on plant roots-reinforced soil

Vegetation slope-protect technology is an effective method of eco-environmental protection and side slope treatment,which makes it possible to be widely used in engineering practice.With the research results of slope vegetation technology lagging behind the engineering application,a comprehensive review of the domestic and foreign shear test results of plant roots-reinforced soil was provided in this paper.According to the different soil samples,the test methods were divided into four types: the undisturbed roots-reinforced soil direct shear test,the undisturbed roots-reinforced soil triaxial shear test,the disturbed roots-reinforced soil triaxial shear test and the disturbed roots-reinforced soil direct shear test.These four types of test methods and their working conditions were introduced.The reinforcing effects of the root system upon soil shear strength and the changing regularities of roots-reinforced soil strength under composite working conditions were summarized and analyzed respectively.The achievements indicate the existing problems and directions for future research,which are expected to offer references for the follow-up shear tests of plant roots-reinforced soil.