Stability Evaluation of Damaged Mountain Highway Slope under Various Ecological Restoration Context

In this paper, the highway slope in Changchunling of Dingma Line in Zhejiang Province was taken as an example, and GEOSTUDIO software was used to evaluate the stability of the damaged mountain slope after ecological restoration. Firstly, the stability of the original slope before restoration was analyzed. According to the standard, a staggered bar support scheme was developed to analyze the stability of damaged mountain slope after support. Then the stability of mountain slope after plant planting was analyzed. According to the specification, three kinds of working conditions were set up: normal working condition, abnormal working condition Ⅰ and abnormal working condition II. Under the three working conditions, three kinds of conditions were divided respectively. They were original bare rock slope, shaping + bolt supporting slope and supporting + soil covering + plant planting slope. The results showed that the stability coefficient of the slope was increased by 0.196～0.232 under the three ecological restoration conditions of the original bare rock slope. The slope supported by reshaping 1 anchor rod, the slope supported + soil covered + plant planted, indicated that the ecological restoration was beneficial to the stability of the slope. The slope safety factor of abnormal condition Ⅰ and Ⅱ under the slope safety factor decreased much than the normal working conditions. The stability evaluation results showed that the soil slope became more secure and stabile when the damaged mountain was under three operating conditions of plastic anchor supporting and plant after turns.