Large-tonnage box beam erecting construction method for small-radius curve ramp

The invention discloses a small-radius curve ramp large-tonnage box beam erecting construction method which comprises the steps that S1, a bridge erecting machine curve section via hole is prepared, S2, the posture deviation of the bridge erecting machine is adjusted, a third column deviates outwards with the maximum deviation amount P, a first column machine arm of the bridge erecting machine deviates towards the inner side of a curve by m1, meanwhile, a first column cross beam transverse moving sleeper beam deviates towards the inner side of the curve by n1, and the third column machine arm of the bridge erecting machine deviates towards the inner side of the curve by n1; s4, the height of the whole machine is adjusted; S5, the position of the first column is adjusted; S6, beams are fed; S7, the beam falling position is adjusted; the device has the beneficial effects that the bottom of the first column of the bridge erecting machine is provided with the transverse moving oil cylinder capable of realizing fi