State Route 99 Tunnel, United States of America
プロジェクト情報
ロケーション: Seattle, Washington, アメリカ合衆国
- New construction of a 3.2 km long tunnel to replace the 1950 vintage Alaskan Way Viaduct; daily traffic volume of 110,000 vehicles
- Drilled tunnel with a 17.50 m diameter, covered with 60 cm thick concrete ring segments, tunnel realized using one of the world´s largest tunnel boring machines (TBM) Bertha
- Subsequent development with a double-storey road tunnel, mostly built using in-situ concrete construction
現場でのニーズ
- Realization of the foundation, walls and supported slab as a carriageway construction within the tunnel tube previously drilled
- Detailed planning of the concreting sections with mobile formwork solutions for corbels, walls and slab; all formwork carriages following the TBM moved on one and the same rail construction through the tunnel
- Taking into account the winding tunnel route and the resulting lateral inclinations of the slab
顧客名
Seattle Tunnel Partners, Seattle, Washington, United States
お客様にとっての価値
- Coherent overall concept due to the close cooperation of all parties and early planning
- Efficient construction of the structure under difficult boundary conditions
- Cost-effective execution by maximizing the proportion of system components from the PERI rental park
- Fast working through the use of hydraulic solutions for shuttering and striking
- Maintaining the tight construction schedule for all forming operations due to flexible geometrical adaptations
提案内容
- Development of an overall concept for forming foundations, walls and slabs within the previously drilled tunnel tube
- Planning and delivery of project-specific mobile formwork carriage solutions for creating starter units, 4.50 m high side walls as well as a supported slab
- Formwork carriage designed for 16.45 m long sections – based on the expected average drilling rate of the tunnel boring machine
- Shuttering and striking concept with hydraulic components if required
- Configuration of all formwork carriages with corresponding passageway openings for transporting materials in the direction of the tunnel boring machine