單項(xiàng)選擇題由緩和曲線、圓曲線、緩和曲線組成的復(fù)合曲線,已知緩和曲線長(zhǎng)為I、圓曲線半徑為R、轉(zhuǎn)向角為A、內(nèi)移距為P=I2/24R、切垂距為M=I/2-I3/240R2,那么該條曲線的外失距是()

A.E=(R+P)/cos(A/2)-3R
B.E=(R+P)/cos(A/2)-2R
C.E=(R+P)/cos(A/2)-R
D.E=(R+P)/cos(A/2)


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3.單項(xiàng)選擇題緩和曲線采用切線支距法計(jì)算坐標(biāo)的公式為()

A.y=ι3-ι5/(336R3I03)+ι11/(42240R5I05)…
B.y=ι3-ι6/(336R3I03)+ι11/(42240R5I05)…
C.y=ι3-ι7/(336R3I03)+ι11/(42240R5I05)…
D.y=ι3-ι8/(336R3I03)+ι11/(42240R5I05)…

4.單項(xiàng)選擇題緩和曲線采用切線支距法計(jì)算坐標(biāo)的公式為()

A.x=ι-ι4/(40R2I02)+ι9/(3456R4I04)…
B.x=ι-ι5/(40R2I02)+ι9/(3456R4I04)…
C.x=ι-ι3/(40R2I02)+ι9/(3456R4I04)…
D.x=ι-ι2/(40R2I02)+ι9/(3456R4I04)…

5.單項(xiàng)選擇題緩和曲線的弦長(zhǎng)計(jì)算公式為()

A.ι×(1-ι4/(πR2I02))
B.ι×(1-ι3/(90R2I02))
C.ι×(1-ι5/(90R2I02))
D.ι×(1-ι4/(90R2I02))