(1. School of Engineering，Sun Yat-sen University，Guangzhou，Guangdong 510275，China；2. Research Center for Geotechnical Engineering and Information Technology，Sun Yat-sen University，Guangzhou，Guangdong 510275，China；3. Xiamen Luluxing Green Project Construction Co.，Ltd.，Xiamen，Fujian 361009，China)
Abstract：According to the situation of Shaoguan-Ganzhou expressway slope project，the indoor scour test model of expressway slope ecology protection was designed and made. 378 groups scour testing were carried out which included three kinds of plants(i.e. Tall fescue，Dogtoothgrass，Trilobate wedelia)，three kinds of slope angles(i.e. 1∶0.75，1∶1 and 1∶1.15)，seven kinds of protection forms(i.e. coconut fibre nets，three-dimensional nets，three-dimensional nets plus coconut fibre nets，wire netting，wire netting plus coconut fibre nets，geocell，geocell plus coconut fibre nets)，three kinds of rainfall intensities(i.e.，40，80，120 L/(104 s·m2)) and two plant growth periods(i.e. 2-month and 5-month). The testing results show that the protection effect which used coconut fibre nets is markedly better than that of three-dimensional nets，wire netting，and geocell. The slope ecology protection which used coconut fibre nets solely or coconut fibre nets and other protection forms together can availably reduce the rainstorm scour especially when the tall fescue and Dogtoothgrass growth 2-month and the slope angle is bigger than 1∶1，or Trilobate wedelia growth 2-month or 5-month.
