山区高速公路改扩建工程中互通式立交设计研究

Study on Interchange Design of Expressway Reconstruction and Expansion Project in Mountainous Area

基于山区高速公路互通式立交的特点,提出了其设计过程中应遵循的原则,以及应考虑的因素,从平纵指标、匝道端部施工期交通组织、匝道加宽与出入口设计及改建施工期交通组织、超高设置等方面详细介绍了其设计要点,以避免因设计方案不合理导致的改扩建规模和造价大幅增加的问题。

Based on the characteristics of mountainous expressway interchange, the principles and factors that should be followed in the design process are put forward. The key points of the design are introduced in detail from the aspects of horizontal and vertical indicators,traffic organization of ramp end during construction period, ramp widening and entrance and exit design and traffic organization during reconstruction and ultra-high setting, so as to avoid the problem of large increase in reconstruction scale and cost caused by unreasonable design scheme.