EFFECT OF THE HERBAGE ON RESISTANT SCOURING OF FRONT SLOPE AT THE ENTRANCE OF SHALLOW TUNNEL

With the proposal of environment friendly tunnel porch concept and ecological and environmental design, plant roots to improve the stability of slope are used to protect original ecology of slopes. However, it is not clear about the effective and mechanism of reinforcing and resistance scouring from plant roots. Therefore, it is necessary to research deeply the action of slope for roots. In the paper, survey method in-site was conducted to the effect of rainfall on scouring with and without covering plants. The effective of plant is analyzed to resist to scouring. The resistant shearing strengthen parameters were measured by test in the experiment and FEM of reduced -strengthen method was used to simulate the action to reinforce of herbage. And shallow landslide was analyzed and evaluated plants roots. It is found that the plant root improves slide and scouring to its degree, especially in the district of gravel-cobble for least sand. At the same time, it can improve slope slide and decrease the polity according to different plant and soils. The conclusion can provide the reference to similar slope protection of design and construction and the conservation of slope during operation.