Proceedings of the Korean Geotechical Society Conference (한국지반공학회:학술대회논문집)
- 2010.09c
- /
- Pages.72-77
- /
- 2010
GEOTECHNICAL DESIGNS OF THE SHIP IMPACT PROTECTION SYSTEM FOR INCHEON BRIDGE
- Choi, Sung-Min (Korea Expressway Corporation (KEC)) ;
- Oh, Seung-Tak (Korea Expressway Corporation (KEC)) ;
- Park, Sang-Il (Korea Expressway Corporation (KEC)) ;
- Kim, Sung-Hwan (Korea Expressway Corporation (KEC))
- Published : 2010.09.09
Abstract
The Incheon Bridge, which was opened to the traffic in October 2009, is an 18.4 km long sea-crossing bridge connecting the Incheon International Airport with the expressway networks around the Seoul metropolitan area by way of Songdo District of Incheon City. This bridge is an integration of several special featured bridges and the major part of the bridge consists of cable-stayed spans. This marine cable-stayed bridge has a main span of 800 m wide to cross the vessel navigation channel in and out of the Incheon Port. In waterways where ship collision is anticipated, bridges shall be designed to resist ship impact forces, and/or, adequately protected by ship impact protection (SIP) systems. For the Incheon Bridge, large diameter circular dolphins as SIP were made at 44 locations of the both side of the main span around the piers of the cable-stayed bridge span. This world's largest dolphin-type SIP system protects the bridge against the collision with 100,000 DWT tanker navigating the channel with speed of 10 knots. Diameter of the dolphin is up to 25 m. Vessel collision risk was assessed by probability based analysis with AASHTO Method-II. The annual frequency of bridge collapse through the risk analysis for 71,370 cases of the impact scenario was less than
Keywords