Cable-stayed bridges - Computational Analysis and Design of Bridge Structures - page 334

cable from ultraviolet radiation, atmospheric moisture, precipitations, and
temperature fluctuations. In most situations, the PE jacket will be filled with
cement grout.
Because cables can also provide the initial support by transferring the
loads to the pylons, girders can be erected segment by segment. For steel
girders, girder segments can be fabricated in the factory and installed on-
site (Figure 11.11). For concrete girders, a traveling carriage can be built
to support the casting of concrete on-site (Figure 11.12). Once a segment
is in place, a pair of cables will be jacked to support the erected segment.

Figure 11.11 Lifting and erecting of one segment.

Erected cables Erected cables Construction cables

Erected girder segment Erected girder segment Erecting segment

Traveler carriage

Figure 11.12 Traveling carriages for casting in-site segment.