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WEC
34 Carrie Drive
Greenville, SC 29615
PH 864-627-7751
FX 864-627-7754
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Liberty Bridge
Greenville, SC
| Owner/Principal: |
City of Greenville
Greenville, SC |
| Engineer: |
Bunnell-Lammons Engineering, Inc.
Greenville, SC |
| Contractor: |
Triangle Construction Company
Greenville, SC |
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The Liberty Bridge in Greenville, South Carolina is a curved, cable-stayed, pedestrian bridge with primary support provided by two towers. The bridge was originally designed to be supported on drilled piers.
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Subsurface conditions consist of poorly compacted fill, soft alluvial soils and layered rock with seams overlying relatively continuous, hard rock. |
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Access to some of the foundation locations was difficult requiring the foundation construction equipment to make river crossings and climb steep construction roads. |
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To overcome these difficulties, the bridge was alternately supported on a combination of micropiles, rock anchors and anchor piles. Micropiles were used to resist compressive and/or lateral loads. Rock anchor were used to resist tension loads. Anchor piles, a combination of rock anchors and micropiles were used to resist tensile forces and to eliminate excessive settlement of pile caps into the underlying fill during pre-stressing. |
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A total of 32 micropiles, 12 rock anchors, 32 anchor piles were installed. Micropiles were 5½ inch diameter, N80 casing. Rock anchors were 1¾-inch diameter, GR 150 threadbar. The use of micropiles and anchor piles led to improved construction scheduling and reduced costs. |
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