A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Using Tieback Anchors to Stabilize an Active Landslide in San Juan Capistrano, California
An ancient landslide was re-activated in 1998 in a hillside-graded area of San Juan Capistrano, California. The landslide occurred within a park site and threatened an adjacent residential development. The ensuing litigation led to the design and construction of a retention system with high-capacity tieback anchors in 2000. This system consisted of five levels of lateral support, with each level containing up to three rows of tiebacks and continuous walers. A total of 864 tieback anchors were installed, ranging in design load capacity from 300 to 365 kips. In order to account for the continuing slide movement that was expected to occur during the ongoing construction activities, the anchors were locked off at or above 50 percent of the design capacity. Post-construction monitoring has indicated that the measured loads in about 60 percent of the anchors continued to increase over a period of several years, up to 38 percent higher than the design capacity in some anchors. The anchor loads have now decreased to an equilibrium state at generally less than, or equal to, the design capacity (with few exceptions). This design approach has proven successful in resisting the active slide movement within the mitigated area.
Using Tieback Anchors to Stabilize an Active Landslide in San Juan Capistrano, California
An ancient landslide was re-activated in 1998 in a hillside-graded area of San Juan Capistrano, California. The landslide occurred within a park site and threatened an adjacent residential development. The ensuing litigation led to the design and construction of a retention system with high-capacity tieback anchors in 2000. This system consisted of five levels of lateral support, with each level containing up to three rows of tiebacks and continuous walers. A total of 864 tieback anchors were installed, ranging in design load capacity from 300 to 365 kips. In order to account for the continuing slide movement that was expected to occur during the ongoing construction activities, the anchors were locked off at or above 50 percent of the design capacity. Post-construction monitoring has indicated that the measured loads in about 60 percent of the anchors continued to increase over a period of several years, up to 38 percent higher than the design capacity in some anchors. The anchor loads have now decreased to an equilibrium state at generally less than, or equal to, the design capacity (with few exceptions). This design approach has proven successful in resisting the active slide movement within the mitigated area.
Using Tieback Anchors to Stabilize an Active Landslide in San Juan Capistrano, California
Lee, David H. (author) / Cunningham, Colin E. (author) / Geraci, Karen E. (author) / Lee, D. Elliott (author)
Earth Retention Conference (ER) 2010 ; 2010 ; Bellevue, Washington, United States
Earth Retention Conference 3 ; 910-919
2010-07-26
Conference paper
Electronic Resource
English
Using Tieback Anchors to Stabilize an Active Landslide in San Juan Capistrano, California
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