勐曼水电站进场公路缓和曲线与竖曲线的分析

Example Analysis of Transition Curve and Vertical Curve of Access Road of Mengman- 2 and Mengman- 3 Hydropower Stations

勐曼二、三级水电站进场公路缓和曲线和竖曲线,为了有效控制工程质量、准确检核道路轴线的偏移情况、合理控制高边坡的超欠挖,精确核定土石方开挖工程总量,理论与实际相结合,确保工程可控在控。设计阶段,借助纬地道路设计软件、海地道路设计软件、鸿业市政道路设计软件等专业软件,可以在电脑上轻易获得缓和曲线、竖曲线的相关参数及有关点位坐标。文中介绍的方法,回归缓和曲线、竖曲线的基本原理,通过CASIO fx-4 800 p编程进行大量的数据处理,准确、简单、方便、快捷。

The total length of the access roads 293121km, which includes 129 sections with a to Mengman- 2 and Mengman- 3 hydropower stations is 11. transition curve （138 sections with a horizontal curve）, 20m long each, 2.58km in total, accounting for 22.85% of the total road length and 61 sections with a vertical curve, the maximum longitudinal slope of 9%, the shortest slope length of 39.501m, the convex radius of 4OOm and the mini- mum concave radius of 450m. In order to control the project quality in an effective way the deviation of the road ax- is was precisely examined and checked, both overexcavation and underexcavation of high slopes were properly con- trolled, the total quantity of the earth - rock excavation was accurately checked and ratified, theory was integrated with oractice so that the construction of the road Droiect was ensured to be controllable or under control.