关键词: 复杂地质, 理正软件, 道路改扩建工程, 极限平衡法, 边坡支护施工

Abstract: In order to solve the problems of effective protection and safe excavation in the construction of complex geological slope support, the construction technology of slope support for road reconstruction and expansion is proposed. Lizheng software is applied to repeatedly calculate slope support and various parameters under excavation height, and a series of data are obtained. A reasonable calculation formula is obtained for the optimal cutting height of support through the non-linear fitting function of multiple functions in Matlab. After determining the optimal cutting height and reasonable slope surface shape, the road to expand the slope is excavated, geological information isdynamically obtained, and the limit equilibrium method is applied to implement dynamic stability evaluation of the slope. Based on the evaluation results, advanced support for road reconstruction and expansion slopes is implemented, and optimized support schemes for unstable slopes are proposed. After verifying its rationality through numerical analysis methods, the support plan will be implemented and the next stage of excavation operations will proceed. Stable slopes will directly proceed to the next stage of construction. The application results show that one month later, the deformation in the X, Y, and Z directions is less than 2.5mm, achieving good construction results.

Key words: complex geology, Lizheng software, road renovation and expansion projects, limit equilibrium method, slope support construction