Sealing plugs for largest immersion tunnel
22 February 2010
Beele Engineering has completed its latest sealing project which involved the plugging of an immersion tunnel near the South-Korean city of Busan that is being immersed by Mergor, a subsidiary of Strukton. The deepest element of this tunnel was placed recently at a depth of 50m.
The tunnel is 3.2 kilometres long and to create the watertight sealing of pipe penetrations, contractors employed the Dynatite system from Beele Engineering.
Prior to the field application, tests were carried out to determine the max. pressure load of this advanced sealing plug. The plug was tested under a pressure load of 1400 kg (14 kN). The pressure test was even continued with higher loads to determine the max. compression of the plug. Even at the extremely high pressure load of more than 18 kN (equalling a pressure of 27.5 bar!) the profiling of the Dynatite plug hadn’t reached bulk modulus and thefore could be compressed even further.
The Dynatite system was developed for applications where a high degree of (instantaneous) tightness is required. The Dynatite plugs are compressible, can easily withstand shock pressure loads of more than 150 psi (10 bar) and will return to their original shape after shock pressure. The dynamic compression of the plug is based on the high-tech rubber grade and the engineered profiling.
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