附带曲线整治

上(m)B值A值各点计划正矢正矢总和计(mm)123456789101233026.52027.4962.4962.504193838383833520935025.68829.1594.1590.84l1836363636351220940023.60933.3163.3161.68416313131313l29720745021.52937.4732.4732.5271428282828282824320950019.44941.6301.6303.3701225252525252525191207918020.29819.9984.9980.002356969693527720019.19022.21l2.2112.7893162626253627625016.42127.7442.7442.256255050505045827830013.65233.2773.2771.72321424242424239927935010.88238.8103.8101.190183636363636363510279现举例说明如下:例:已知50kg/m钢轨9号道岔,线间距D=5.040m,R=300m,实测各点正矢如下表,计算各点拨量。解:1、确定各桩点位置1)侧外股曲线头至辙叉尾距离LL=-T-b=-16.616-15.009=14.014mL查表换算方法为L=ΔD×道岔系数+表列L(9号道岔系数=9.05512号道岔系数=12.042)式中ΔD—为线间距差数2)附带曲线头至尾的长度K上K上=K上=R外α=×6°20′25″×300.7175=33.277m2、各点正矢计算fc==≈41.7mmf1==≈21mmf7=(1-)×fc=(1-)×41.7≈39mmf8=×fc=×41.7≈9mm 式中a=A+B=5mB—为K上的尾数(3.277m)A—5-3.277=1.723m