Evaluation On The Vegetation Restoration Along Baolong Highway Slope

Through vegetation restoration on existing highway slope , this article sums up the researching status. Relying on Yunnan communications department's technology projects—constructing demonstration projects of Baolong highway, following the principles of restoration ecology, specially made much investigation and study selection on growth situation on Baolong highway slope. Studies suggest that the restoring effect of the whole range slope is relatively successful, basicly reached to the design effects,like safety stability, ecological restoration, landscape, social economy, and so on.The main factors of vegetation recover in geotechnical slope is the rock properties: Organic and inorganic salt concentration is rich on the strongly weathered granite,and provides good conditions for vegetation growth; The vegetation site conditions is poor on the hard rock side slope , steep, hard, poor water-retaining function, less activative nutrient, root can't stretch into, so the vegetation restoration is poor; Different weathering degree of clay shale, the surface soil hardness and resistance to corrosion are not all the same, thus the vegetation restoration are also different; Vegetation restoration on different soil slope earth-rock mixture ,and the main control factors are different.According to vegetation ecology, following the principle of evaluation system, establish the evaluation index system for vegetation restoration effect on Baolong highway slope, develop four criterion layers, the effects of engineering, ecological, landscape and social economic, using experts - AHP determine the weight of each target of criterion strata and index layer; Adopting multi-objective linear weighted function method - comprehensive pointrating method to evaluate, evaluation index is divided into Health, and Subhealth, General, Bad, Worse, five levels.The selected four types of slope, The comprehensive scores on strongly weathered granite slopes is the highest,>6.88, are Health, clay shale slopes are Subhealth, the vegetation restoration on soil slopes is General, and the hard rock slopes is Worse.The evaluation index system established in this paper, provide theoretical support and experience guidance for the vegetation restoration work for the slope; It also has certain promotion application, providing reference guides to surrounding highway (for example, Baoteng highway) and the similar soil slope.