高速公路桥梁改路基优化设计实例分析与评价

摘要

Optimal design of modification of bridges into roadbeds is a technical problem that is often encountered in construction of expressways in mountainous area, and reasonable optimal change according to actual conditions of site will produce good effect. This paper analyzes the scheme of modifying one bridge into roadbed on Chognqing Qianjiang - Hubei Enshi Expressway Project, and demonstrates practicality, economy, environmental protection and reliability of the scheme of modifying the bridge into roadbed in accordance with topographic and geological conditions of site and requirements for discarded earthwork. The results of demonstration show that the scheme of optimal change of modifying bridges into roadbeds has better economic benefits and environmental protection values.%桥梁改路基优化设计是山区高速公路建设中经常遇到的技术问题,根据场地实际条件进行合理优化变更会产生好的效果. 对重庆黔江—湖北恩施高速公路项目上的一处桥梁改路基方案进行分析,按照场地的地形地质条件与弃方要求来论证该桥梁改路基方案的适宜性、经济性、环保性和可靠性. 论证结果表明:桥梁改路基优化变更方案具有更好的经济效益和环保价值.