Tensar Geogrid-Reinforced Soil Wall: Grade-Separation Structures on the Tanque Verde-Wrightstown-Pantano Roads Intersection, Tucson, Arizona. Experimental Project 1. Ground Modification Techniques

摘要

The report documents relevant information on the design, construction, and performance of Tensar geogrid-reinforced soil retaining walls used in grade-separation structures on the Tanque Verde-Wrightstown-Pantano Roads Intersection project in Tucson, Arizona. The project represents the first use of geogrid reinforcement in mechanically stabilized earth (MSE) retaining walls in a major transportation-related application in North America. The reinforced soil walls, which were constructed in 1985, have full height concrete facia panels and range up to 21.9 feet in height. Five main topics are discussed in the report: Tensar SR2 geogrid reinforcement; design of the retaining walls including connections between the geogrid and facia panels; construction steps including pretensions of the geogrid layers; and instrumentation, both during and after construction; and performance based on field observations.