公路养护工程比新建公路技术难度和复杂性更高，经常需要进一步协调交通和现

Highway maintenance projects are more technically difficult and complex than newly built highways. It is often necessary to further coordinate the relationship between traffic and existing projects. It is a close connection between construction safety, construction efficiency, and construction economy. In addition, due to special technology, production, external and internal factors, the requirements for price control are getting higher and higher. The main conclusions of this research are as follows: <br>1. Using value engineering theory, comparing and selecting specific case plans, demonstrating surface asphalt regeneration technology and roadbed regeneration plans, choosing the best plan, and supporting price control in the design stage. <br>2. Apply life cycle assessment theory to obtain environmental benefit assessment, direct economic benefit calculation, and specific cost management effects of case projects. <br>3. The study puts forward various cost management suggestions for case project cost management cases and existing research results. Through this study, it can provide theoretical reference and technical support for subsequent maintenance project cost management.

Highway maintenance project is more difficult and complex than the new highway technology, often need to further coordinate the relationship between traffic and current projects, is the construction safety, construction efficiency, construction economy closely linked to the whole. In addition, due to special process, production, external and internal factors, the price control requirements are getting higher and higher. The study mainly draws the following conclusions:<br>1. Using the theory of value engineering, compare and choose the scheme of specific cases, demonstrate the surface asphalt regeneration process, road-based regeneration scheme, choose the best scheme, and support the price control in the design stage.<br>2. Apply the life cycle evaluation theory to obtain the environmental benefit evaluation, direct economic benefit calculation and specific cost management effect of the case project.<br>3. This study puts forward many suggestions on the case project cost management case and the existing research results, and through this study, it can provide theoretical reference and technical support for the cost management of follow-up maintenance projects.

Highway maintenance project is more difficult and complex than new highway technology. It often needs to further coordinate the relationship between traffic and existing projects. It is a whole closely linked with construction safety, construction efficiency and construction economy. In addition, due to the special process, production, external and internal factors, the demand for price control is also higher and higher. The main conclusions of this study are as follows<br>1. Using the theory of value engineering, compare and select the schemes of specific cases, demonstrate the surface asphalt recycling process and subgrade recycling scheme, select the best scheme, and support the price control in the design stage.<br>2. Apply the life cycle assessment theory to obtain the environmental benefit assessment, direct economic benefit calculation and specific cost management effect of the case project.<br>3. This study puts forward various cost management suggestions for the case project cost management cases and existing research results. Through this study, it can provide theoretical reference and technical support for the subsequent maintenance project cost management.