Point location movement control method of CPIII point on long-span continuous beam of high speed railway
A technology of high-speed railways, control methods, applied in the direction of roads, measuring instruments, measuring devices, etc.
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[0031] When measuring a bridge:
[0032] During CPIII plane net measurement, the length data of beam joints at specific points are measured, see Table 1;
[0033] When the track at CPIII point is finely adjusted, measure the length of the girder joint at this location again, see Table 2;
[0034] Table 1. Length data of girder joints measured during CPIII plane net measurement
[0035]
[0036] Table 2. Length data of girder joints during fine adjustment of the track at CPIII point
[0037]
[0038] At this time, the length change of the beam joint is:
[0039] ΔS 左 =463.92-453.92=10mm;
[0040] ΔS 右 =360.22-350.22=10mm.
[0041] Under the absolute dominance of the linear expansion and contraction of the beam, it is assumed that S 小里程 for 400 meters, S 大里程 If it is 300 meters, the expansion and contraction amount of the continuous beam is calculated according to formula (1) and formula (2) to be about 5.71mm and 4.29mm:
[0042]
[0043]
[0044] The amoun...
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