The Canada Line is a 19 km rapid transit line connecting Downtown Vancouver with Richmond and the Vancouver International Airport (YVR). The airport section of the Canada Line includes a 1.8 km at-grade guideway. The at-grade guideway is designed to accommodate future airplane taxi way requirements in accordance with YVR's future plan. Templeton Street is a major road servicing YVR and connects the North Service Road with Grant McConachie Way. A grade separated structure is required to allow the train to travel at-grade and vehicular traffic to cross over the Canada Line uninterrupted. After comparing various design and construction options for the overpass, the decision was made to design a 60 m long cast-in-place concrete box structure with approach ramps. This paper presents various options considered for the overpass, the preliminary design and detailed design of the overpass structures. The soil condition surrounding the Templeton Overpass consists of highly compressible soft clayed silt. The large amounts of fill placed for the approach ramp and the off ramp to Grant McConachie Way causes short term and long term soil settlement. The effects of the long term settlement on the structural design, roadwork and Canada Line track, and strategy to accommodate the settlement in the structural and trackwork design are discussed in this paper. A brief discussion of the construction aspects will also be included. For the covering abstract of this conference see ITRD number E217481.
Samenvatting