The construction and development of expressways have played a positive role in promoting regional economic and social development, but the construction process and behaviour have caused disturbance to the original landform and caused various damages to the slope. It is currently reasonable protection of the slope is one of the important works of highway construction. This article takes the Huizhou-Qingyuan section of the Shan-Zhan Expressway as an example, analyses and studies different slope ecology from the three aspects of the slope ecological protection mechanism, the slope ecological protection difficulties and the slope ecological restoration design, combined with the current situation of the slope along the line and the main restoration difficulties. This article studies the principles, forms, characteristics of protection technology, and the design of typical slope ecological restoration. The results show that reasonable ecological protection of slopes according to local conditions can achieve slope protection, prevent soil erosion, restore and improve the local ecological environment, and improve highways. The integration and coordination of road landscape and natural landscape are of great significance to ecological environmental protection and driving safety.

With the development of transportation industry, the number of times that overloaded vehicle pass through bridges increases day by day. Taking Shengli bridge as an example, the bridge model was established with finite element software in this paper. According to the vehicle parameters, the vehicle loading model was abstracted, and the process that overloaded vehicle pass through the bridge was simulated. Finally, the safety margin of the bridge was evaluated on the basis of bearing capacity analysis. Permit management measures for the bridge were proposed, which can be referenced by relevant situation.

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