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Design of an Anchored, Cast-in-Place, Backfilled Retaining Wall
Several retaining walls for a road widening project had been designed as Mechanically Stabilized Earth walls. However, the excavation necessary to construct the reinforced zone of the MSE Walls would require extended road closures. One of the MSE walls was re-designed as a backfilled anchored wall with a cast-in-place concrete facing. Excavation shoring necessary for construction of the wall was also designed. The excavation shoring consists of reinforcing a temporary cut slope with up to three rows of passive ground anchors connected to steel mesh at the face of the excavated slope. The excavation shoring was designed to allow construction of the concrete wall while limiting the duration of road closures to a few hours at a time. The maximum height of the concrete wall is approximately 6 m. Micropiles were designed to support the axial load of the concrete facing, while the ground anchors were designed to support the lateral loads of the soil. The anchor tendons extend through the concrete wall facing and the zone between the concrete wall and reinforced slope is backfilled with structural fill. A field testing program confirmed the design bond strength of the ground anchors and micropiles.
Design of an Anchored, Cast-in-Place, Backfilled Retaining Wall
Several retaining walls for a road widening project had been designed as Mechanically Stabilized Earth walls. However, the excavation necessary to construct the reinforced zone of the MSE Walls would require extended road closures. One of the MSE walls was re-designed as a backfilled anchored wall with a cast-in-place concrete facing. Excavation shoring necessary for construction of the wall was also designed. The excavation shoring consists of reinforcing a temporary cut slope with up to three rows of passive ground anchors connected to steel mesh at the face of the excavated slope. The excavation shoring was designed to allow construction of the concrete wall while limiting the duration of road closures to a few hours at a time. The maximum height of the concrete wall is approximately 6 m. Micropiles were designed to support the axial load of the concrete facing, while the ground anchors were designed to support the lateral loads of the soil. The anchor tendons extend through the concrete wall facing and the zone between the concrete wall and reinforced slope is backfilled with structural fill. A field testing program confirmed the design bond strength of the ground anchors and micropiles.
Design of an Anchored, Cast-in-Place, Backfilled Retaining Wall
Van Shaar, Steven (author) / Cottingham, Katy (author) / Walker, Andrew (author) / Barrows, Rich (author)
Earth Retention Conference (ER) 2010 ; 2010 ; Bellevue, Washington, United States
Earth Retention Conference 3 ; 352-358
2010-07-26
Conference paper
Electronic Resource
English
Design of an Anchored, Cast-in-Place, Backfilled Retaining Wall
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