A Precast Faced Mechanical Stabilized Earth Solution for a 20 Metre High Mining Crusher Wall with Various Technical and Site Challenges

摘要

This paper presents a case study of the design and construction of a MSE wall at a remote mining site at Bloom Lake near Fermont, Quebec, Canada. The project at the time of completion in 2009 represented the highest precast load-supporting MSE structure by Reinforced Earth Company Ltd. Canada in mining application. The project faced several challenges. The steel strip reinforced earth wall was built straddling a cast-in-place reinforced concrete foundation and partially bears on re-compacted fill and bedrock. This required differential settlement design consideration. Design of the crusher wall also necessitated a load distribution concrete slab on the top to accommodate the significant surcharge and horizontal impact load from the 380 ton payload CAT797B haul trucks. Other constraints of the project were its remote location, wall geometry, cold weather backfilling operation and 24 hour installation.