高速公路加宽的探讨

Discussion of Highway Widening

根据公路工程技术标准(JTJ001-97)规定,高速公路由于曲线极限最小半径Rmin,大于不设加宽的平曲线半径R。因而,高速公路一般不设加宽。本文讨论,由于高速公路平曲线最小极限半径Rmin对应的最大超高Imax,引起车辆倾斜而使得行驶车辆所占空间位置倾斜,使得所占路面宽度无形中增加,得出结论,高速公路也应根据最大超高计算平曲线上的平面加宽。

According to the technological standard (JTJ001-97) of highway engineering, when Rmin of the curve is greater than R of the unwidened faired curve, highway is generally not widened. This paper discusses that the Imax, in correspondence with the Rmin of highway faired cure, causes vehicles to incline. As a result, the space position occupied by vehicles inclines and the width of roadway occupied by vehicles is virtually widened. It draws a conclusion that the plane widening of a highway faired curve should be calculated according to the Imax.