The Outer Ring Tunnel under the Hangpu River has been built as immersed tunnel. The tunnel stretch has a length of 1.860km and includes cast in-situ tunnels on both riverbanks and 7 monolithic tunnel elements, approx. 108m each, with a total length of 736, immersed in place to form the river section. The project construction commenced in December 1999 and the tunnel link is in operation since June 2003.
The immersed tunnel is experiencing significant settlements at one end of the section (Pudong side), issues with rubber seals (GINA and Omega) at some of the immersion joints and water leakages at various locations.
Scope of Work
The Chinese Design Institute STEDI has requested TEC to provide specialist and independent consultancy services to assess the observed issues, provide potential explanations and prepare repair and mitigation measures.
Shanghai Tunnel Design Institute (STEDI)
In co-operation with
Type of project
Asset management stage, technical services condition assessment
Approx. € 125.000,-