阶梯支距法在高速铁路缓和曲线方向整正中的应用

高速铁路线路曲线(缓和曲线)圆顺度(方向)的检查一般采用普通的弦线测量正矢的方法和使用专用测量小车的方法.但由于高速铁路线路曲线半径大,缓和曲线长,缓和曲线的正矢值太小,在实际测量中,弦线法几乎不能使用.专用小车测量三维坐标的方法,需要的设备多,仪器架设繁杂,检测时间漫长,效率低.提出了一种在高铁线路两股钢轨间的无砟道床板上布设基线,用测量缓和曲线各点支距值,对缓和曲线进行方向控制的方法.计算表明,使用阶梯支距法完全可以满足在道心道床板上进行基线布设和支距点画标的要求.在道心道床板上对缓和曲线支距值进行测量时,快速、准确、方便,节约人力.试验表明阶梯支距法在高速铁路缓和曲线方向的控制上具有良好的使用效果.

Ladder Offset Method Used in Measuring Transition Curve Versine for Direction Maintenance of High-Speed Rail

High-speed rail line curve （transition curve） smoother degrees （direction） checks can generally be made using ordinary strings measuring curve versine and using the special car approach measuring methods. However, due to the high-speed railway line curve radius is large and the transition curve is long, and easing curve versine value is too small, so in actual measurement, this method can hardly be used. The measuring of three-dimensional coordinates using special car, requires more equipment, instruments and longer detection time. This paper presents a new method for measuring of transition curve by the baseline setting on strands monolithic concrete track bed, which is in the middle of the two rails. Calculations show that the use of a stepped offset method can meet the requirements of drawing line on strands monolithic concrete track bed. Measuring offset distance on strands monolithic concrete track bed is fast, accurate, convenient, and of saving manpower. Tests showed ladder method has a good effect on the control of high-speed railway transition curve direction.