A Simplified Calculation Method of Length Adjustment of Datum Strand for the Main Cable with Small Sag

Table 4

The target geometry parameters of the datum strand and catwalk bearing rope under erection stage.

Item	Target unstressed length (m)	Position	Mileage (m)	Elevation (m)	l (m)	h (m)	f (m)
Catwalk bearing rope at main span	863.989	Anchorage point at Zhangjiajie side	2545.782	592.072
		Middle span	2970.000	522.551	848.406	7.601	73.322
		Anchorage point at Huayuan side	3394.188	599.673
Catwalk bearing rope at side span	213.937	Anchorage point at girder end	2347.093	494.047
		Middle point at side span in Zhangjiajie	2442.523	541.093	190.859	97.991	1.950
		Anchorage point at tower end	2537.952	592.038
Datum strand at main span	869.797	Tangent point at tower end in Zhangjiajie	2543.967	593.374
		Middle span	2969.920	520.267	851.937	7.614	76.914
		Tangent point at tower end in Huayuan	3395.904	600.988
Datum strand at side span	218.338	Tangent point at girder end	2343.368	493.770
		Middle span	2440.621	538.664	194.505	98.986	4.599
		Tangent point at tower internal end	2537.873	592.755