摘要
目前,公路工程施工便道设计缺少可以依据的标准和规范,便道设计深度往往不足,尤其在山区高速公路施工中,施工便道多数由施工单位根据地形现场修建,普遍存在工程量过大、造价较高和生态破坏较大等问题.针对这些问题,根据多个公路项目施工便道设计经验总结及施工验证,按照主便道、支便道、保通便道和便桥等分类研究了施工便道的总体设计思路,并给出了便道平面设计速度、圆曲线最小半径、最大纵坡、路基宽度和路面结构等主要设计指标.
Abstract
At present,the design of road construction access is short of standards and specifications that can be used as a basis,and the design depth of the access is often insufficient.Especially in the construction of expressway in mountainous areas,most of the construc-tion access is built by the construction unit according to the terrain site,and there are generally problems such as excessive quantities of work,high cost and large ecological damage.In view of these problems,based on the summary of construction access design experi-ence and construction verification of several highway projects,the overall design idea of construction access is studied according to the classification of main access road,branch access road,access road and temporary bridge,and the main design indicators such as the plane design speed of access road,the minimum half diameter of circular curve,the maximum longitudinal slope,subgrade width and pavement structure are given.
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