CAJ | 학술논문

针对长大连续梁上CPIII控制点随梁体变形发生位移，从而导致CPIII控制点平面坐标发生变化的问题，提出一种新的解决方法。该方法通过比较2对CPIII控制点间的实时距离与原始距离，获得梁体缩放系数，然后将连续梁上CPIII控制点的原始平面坐标转换到桥轴线坐标系中并利用梁体缩放系数对其进行改正，最后将改正后的坐标转换回线路独立坐标系中，得到CPIII控制点的实时平面坐标。通过工程实践验证，新方法在梁体变形主要受温度影响的前提下适用，无需专门设备测量梁体伸缩量，能够在轨道板精调或轨道精测前实时获得梁上CPIII控制点的平面坐标，并满足精度要求。该方法可在高速铁路精密工程测量中推广使用。
침대장대련속량상CPIII공제점수량체변형발생위이，종이도치CPIII공제점평면좌표발생변화적문제，제출일충신적해결방법。해방법통과비교2대CPIII공제점간적실시거리여원시거리，획득량체축방계수，연후장련속량상CPIII공제점적원시평면좌표전환도교축선좌표계중병이용량체축방계수대기진행개정，최후장개정후적좌표전환회선로독립좌표계중，득도CPIII공제점적실시평면좌표。통과공정실천험증，신방법재량체변형주요수온도영향적전제하괄용，무수전문설비측량량체신축량，능구재궤도판정조혹궤도정측전실시획득량상CPIII공제점적평면좌표，병만족정도요구。해방법가재고속철로정밀공정측량중추엄사용。
CPIII control points in large continuous beams displace with the deformation of the beams,which changes the plane coordinates of CPIII control points.To solve this problem,a new solution was introduced in this paper.With this method the zoom coefficient of the beam body was obtained by comparing the actual dis-tance and the original distance of two pairs of CPIII control points.Then the original plane coordinates of CPIII control points were converted into bridge axis coordinate system,and modified by using the zoom coefficient of the beam body.Finally,the revised coordinates were shifted to the independent line coordinate system,so as to get the real-time coordinates of CPIII control points.It is verified that the new method is applicable in the con-dition of beam deformation affected mainly by temperature,and can gain real-time plane coordinates of control points by using the new solution,before track plate precision adjustment or track precision measurement,without measuring the beam expansion volume with specialized equipment.Since the results can meet the accuracy re-quirements of engineering practice,this proposed method can be promoted into high-speed railway precision en-gineering measurement.