e-mosty December 2018 e-mosty December 2018 | Page 70

Figure 10: Longitudinal girders and lateral beams frame
CONSTRUCTION
The superstructure was erected by using a cable-
hoisting construction method. The single steel tube
arch rib was divided into six parts – the weight of each
section is less than 400kN (40 tonnes) – for precast
segment assembly.
Erection of hollow slabs and box rib arch was also
assisted by cable-hoisting construction method. The
total weight was more than 40,000kN, which meant
rapid construction and efficient use of equipment.
The construction of floating continuous frame system
is as follows:
1) Fabricating a rectangular small frame which
consists of two short lateral beams (length 3.6m)
between the adjacent suspenders and the
longitudinal girders on both sides (length 5m) The
corresponding size is 3.6m (width)×7.6m
(length)×(1.17~1.33 m)(height), as shown in
Figure 11.
2) After attaining the required design strength, the
rectangular small frame is hoisted by cable lifting
system, as shown in Figure 12.
Figure 11 ↑: Precasting rectangular small frame
Figure 12 →: Hoisting small frame
4/2018