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WSP Authors Two Technical Papers for GeoOttawa 2017

 

WSP’s geotechnical engineering leaders have answered Canadian Geotechnical Society’s call for papers for this year’s conference scheduled to be held in our nation’s capital. Two WSP-authored technical papers about soil mechanics and foundations, and transportation geotechnics will be presented at the GeoOttawa conference between October 1 and 4.

Soft ground consolidation of a railway yard using wick drains and surcharge fills

By Fanyu Zhu, Tiekui Yan and Shabbir Bandukwala

This paper presents a study of soft ground consolidation using wick drains and surcharge fill in order to reduce the postconstruction settlement of a railway yard, including design concept of the ground consolidation, the results of field monitoring, and theoretical analyses of settlement monitoring results. Ground settlements were measured during and after the placement of engineered fill and surcharge fill. Ground settlements estimated using consolidation theories were compared with field measurement data. The rate of ground consolidation observed in the field was more rapid than the theoretical prediction. Using the field measurement data, the coefficient of consolidation, pre-consolidation pressure and undrained shear strength of the weak silty clay deposits are back-calculated and compared with results from field and laboratory testing.


A case study of roadway embankment design near a retaining wall in Montreal

By Laifa Cao and Scott Peaker

This paper presents a case study of roadway embankment design near an existing cantilever retaining wall in Montreal, Canada. A 6 m high roadway embankment supported using mechanically stabilized earth (MSE) was proposed to replace the existing roadway viaduct. A relieving platform consisting of expanded polystyrene geofoam was proposed to replace the existing soils in the area between the proposed MSE wall and existing retaining wall to relieve the construction impact of the embankment and temporary roadway to the existing retaining wall. A soil-structure interaction analysis using a finite element program confirms that the construction impact on the existing retaining wall can be successfully mitigated by means of the relieving platform. The global stability of the existing retaining wall prior to and after the construction was analyzed to confirm that the construction will not reduce the global stability of the existing retaining wall.


About GeoOttawa 2017

GeoOttawa 2017 is organized by the Canadian Geotechnical Society (CGS) in collaboration with the Canadian National Chapter of the International Association of Hydrogeologists (IAH-CNC). This year marks the 70th Canadian Geotechnical Conference and the 12th Joint CGS/IAH-CNC Groundwater Conference. The theme of GeoOttawa 2017 is “70 Years of Canadian Geotechnics and Geoscience,” a topic that is contemplated and celebrated throughout the conference. Learn more about the upcoming conference.