| Popis: |
Construction of a large retail store in Silverthorne, CO required a permanent earth retention system to support an existing roadway. Site constraints imposed the use of top-down construction through two separate landslides and layers of stiff fissured clay shale. The design of the retaining walls accounts for the potential degradation of clay shear strength through the use of fully-softened values. It also accounts for the presence of weak clay at the interface of landslide rubble and underlying shale rock. A loose, blocky, weathered shale layer encountered within the geologic profile of the earth retention system provided a number of construction challenges. This paper describes the site conditions, design considerations and key aspects of the wall construction. |
