不对称缓和曲线的计算原理和测设  

Computation principle and surveys of asymmetrical transition curve

作　　者：底国民[1] 

机构地区：[1]宁夏大学土木与水利工程学院,宁夏银川750021

出　　处：《宁夏工程技术》2008年第3期221-223,共3页Ningxia Engineering Technology

摘　　要：我国现行公路设计规范规定,三级和三级以上公路在公路路线转弯时,要设置曲线,对于一般地形通常设置为对称曲线,但在特殊地形或受地物限制时,可设置不对称缓和曲线.关于不对称曲线的计算,相关书籍都有各自的算法,根据对缓和曲线构成原理的理解并结合选线测设的实践经验,给出不对称缓和曲线的计算原理和具体的测设方法,以解决困难地形条件下的曲线测设.Our country present highway design standard stipulated that third-level and above third-level road when the highway route makes a turn, must setting the curve. Usually, establishes the common terrain as the symmetrical curve, but in extreme terrain or terrain feature limit time, may establish the asymmetrical transition curve. About symmetrical curve＇s computation, the correlation technique books respective algorithm, according to the experience which the transition curve constitution principle＇s understanding the route selection surveys, gives the asymmetrical transition curve the computation principle and concrete surveys the method, solves under difficult ground condition ranging of curve.

关 键 词：缓和曲线 测设 曲线要素 坐标 选线 

分 类 号：U412.34[交通运输工程—道路与铁道工程]