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Rock Slope Protection System for Differential Weathering Materials
This project involves construction of a 5.4 mile new railroad alignment located in Indiana County, Pennsylvania. The project required the removal of 1.4 million cubic yards of soil and sedimentary rock and resulted in cut slopes as deep as 150 ft and side-hill fill slopes as high as 45 ft. Subsurface investigation indicated that the excavations would expose rock strata that exhibit differential weathering characteristics and could potentially re-activate pre-existing shear planes identified by slickensided surfaces in the test borings. In order to reduce the excavation quantity and right-of-way acquisition, a slope protection system consisting of rock anchors, reinforcing steel mesh, shotcrete, and sub-horizontal drains was developed. This innovative system allowed the design team to utilize steeper rock cut slopes, reducing right-of-way and construction costs. Six inclinometers and seven monitoring wells were installed to monitor the three major cut slopes during and after construction. Inclinometer data indicated movement along distinct shear planes that asymptotically approached zero following the completion of excavation and blasting activities. Construction quality assurance involved 14 verification tests and 31 proof tests for the rock anchors as well as laboratory testing of the shotcrete test panels.
Rock Slope Protection System for Differential Weathering Materials
This project involves construction of a 5.4 mile new railroad alignment located in Indiana County, Pennsylvania. The project required the removal of 1.4 million cubic yards of soil and sedimentary rock and resulted in cut slopes as deep as 150 ft and side-hill fill slopes as high as 45 ft. Subsurface investigation indicated that the excavations would expose rock strata that exhibit differential weathering characteristics and could potentially re-activate pre-existing shear planes identified by slickensided surfaces in the test borings. In order to reduce the excavation quantity and right-of-way acquisition, a slope protection system consisting of rock anchors, reinforcing steel mesh, shotcrete, and sub-horizontal drains was developed. This innovative system allowed the design team to utilize steeper rock cut slopes, reducing right-of-way and construction costs. Six inclinometers and seven monitoring wells were installed to monitor the three major cut slopes during and after construction. Inclinometer data indicated movement along distinct shear planes that asymptotically approached zero following the completion of excavation and blasting activities. Construction quality assurance involved 14 verification tests and 31 proof tests for the rock anchors as well as laboratory testing of the shotcrete test panels.
Rock Slope Protection System for Differential Weathering Materials
Kutschke, Walter G. (author) / Petersen, William (author) / Meyers, John (author)
Geo-Denver 2007 ; 2007 ; Denver, Colorado, United States
2007-10-14
Conference paper
Electronic Resource
English
Dams , Weathering , Louisiana , Landslides , Slopes , Embankments , Rocks
Rock Slope Protection System for Differential Weathering Materials
| British Library Conference Proceedings | 2007
| European Patent Office | 2024