No troubled water for Golden Horn Bay Bridge

 

How could bridge engineers in Russia remove rainwater even during harsh weather conditions from one of the world’s longest cable-stayed bridges?

The clock was ticking for Vladivostok. This Siberian city on Russia’s Eastern coast was chosen to host the 2012 Asia-Pacific Economic Conference.

By way of improving the transport infrastructure for delegates and residents alike, one of the world’s longest cablestayed bridges was erected to span the city’s Golden Horn Bay. But how would bridge engineers build a water removal system to withstand those harsh winters and extreme rainfall conditions?

Fast installation

Cast iron funnels were built into the structure of the bridge to direct rainwater into pipes passing below the bridge deck. Over two kilometers of pre-insulated pipes with heat-tracing profiles were installed.

Consisting of PVC carrier pipes encased within PE pipes, this lightweight solution is similar to those multilayer systems used for district heating. Two separate diameter versions were supplied in three, four five and six meter lengths. Fast installation of these compact elements within a limited space would prove essential.

No freezing pipes

Installed in March 2012, these pipes will not freeze despite their altitude, longitude or latitude. With almost twice the thermal insulation capacity of mineral wool, these pipes will perform come arctic or monsoon conditions. Moreover, long life with no maintenance means that the Golden Horn Bay Bridge will be a hallmark for plastic pipe technology and a landmark to be admired for many generations to come.

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