高性能植被保护系统防护膨胀土边坡试验研究

Experimentalstudy on protection of expansive soil slope with high performance turf reinforcement mats system

高性能植被保护系统(HPTRM系统)是高性能植被保护垫结合活性植物在坡面构成具有自身生长能力的一种新型生态边坡防护系统。HPTRM系统将柔性防护和植被防护相结合,是一种新型的膨胀土边坡防护措施。为了了解HPTRM系统在实际工程中防护膨胀土边坡的效果,在广西南宁东沟岭某膨胀土边坡防护工程中分别采用HPTRM系统和普通植草两种防护措施,并进行原位综合监测,监测不同防护边坡的土体含水率、温度、竖向膨胀量等指标,对比分析各监测指标的变化规律,得出:相对于普通植草防护,HPTRM系统能减小大气环境对边坡深层土体含水率和温度的影响,显著减小土体竖向膨胀量,约束土体的膨胀变形,具有良好的防护效果,HPTRM系统值得在膨胀土边坡生态防护中推广应用。

High performance turf reinforcement mats system(HPTRM system)is a new ecological slope protection system with a combination of high performance turf reinforcement mats(HPTRM)and vegetation on the slope.The growth of grass can also reinforce the slope.The HPTRM system combines flexible protection with vegetation protection to protect the expansive soil slope.In order to analyze the effect of the HPTRM system in protecting the expansive soil slope in actual engineering,the field test of the HPTRM system protection experimental group and the common grass protection control group was laid in the expansive soil slope of Donggouling,Nanning.The indicators such as soil water content,temperature and vertical expansion of different protective slopes were monitored,and the variation rules of each monitoring index were compared and analyzed.The experimental results show that the HPTRM system can reduce the influence of atmospheric environment on the water content and temperature of deep soils,significantly decrease the vertical expansion of the soil,as well as restrain the expansion and deformation of the soil.The research results show that HPTRM system protects expansive soil well,and provides an important basis for its promotion in the ecological protection of expansive soil slope.