A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Design and Construction of a Soldier Pile and Lagging Wall in Piedmont Residual Soil
This paper describes the design and construction of embedded retaining structures for temporary support of excavation at a site for a new multi-story building in Atlanta, Georgia. The ground conditions comprise fill overlying Piedmont residual soil, partially weathered rock, and gneiss. A soldier pile and lagging wall was designed for a maximum depth of excavation from street level of about 11.4 m (37.5 ft), with a maximum retained height at the wall face of about 9.9 m (32.5 ft). Lateral support was provided by up to three rows of drilled and grouted post-tensioned ground anchors (tiebacks) on three sides of the site. The soldier pile members were designed as pairs of back-to-back MC channels installed in drilled holes. Tiebacks were installed between the webs of the channels to eliminate walers. Threaded bar was used as the stressing tendon in each tieback. Where site constraints did not permit use of tiebacks, the soldier piles were wide flange sections with walers and steel pipe corner braces or steel rakers for internal support. This paper presents the results of two verification load tests that were performed on non-production gravity grouted tiebacks in the Piedmont residual soil. These sacrificial tiebacks verified an ultimate unit grout-to-ground bond stress of 140 kN/m2 (20.5 psi). This value is compared to bond stresses from other projects in Piedmont residual soil for different ground engineering elements and installation techniques, and values published in the literature for similar soils.
Design and Construction of a Soldier Pile and Lagging Wall in Piedmont Residual Soil
This paper describes the design and construction of embedded retaining structures for temporary support of excavation at a site for a new multi-story building in Atlanta, Georgia. The ground conditions comprise fill overlying Piedmont residual soil, partially weathered rock, and gneiss. A soldier pile and lagging wall was designed for a maximum depth of excavation from street level of about 11.4 m (37.5 ft), with a maximum retained height at the wall face of about 9.9 m (32.5 ft). Lateral support was provided by up to three rows of drilled and grouted post-tensioned ground anchors (tiebacks) on three sides of the site. The soldier pile members were designed as pairs of back-to-back MC channels installed in drilled holes. Tiebacks were installed between the webs of the channels to eliminate walers. Threaded bar was used as the stressing tendon in each tieback. Where site constraints did not permit use of tiebacks, the soldier piles were wide flange sections with walers and steel pipe corner braces or steel rakers for internal support. This paper presents the results of two verification load tests that were performed on non-production gravity grouted tiebacks in the Piedmont residual soil. These sacrificial tiebacks verified an ultimate unit grout-to-ground bond stress of 140 kN/m2 (20.5 psi). This value is compared to bond stresses from other projects in Piedmont residual soil for different ground engineering elements and installation techniques, and values published in the literature for similar soils.
Design and Construction of a Soldier Pile and Lagging Wall in Piedmont Residual Soil
Elliott, Graham (author) / Shull, B. Philip (author) / Wilde Grant, Kirsten (author)
Geo-Congress 2022 ; 2022 ; Charlotte, North Carolina
Geo-Congress 2022 ; 536-549
2022-03-17
Conference paper
Electronic Resource
English
Design and Construction of a Soldier Pile and Lagging Wall in Piedmont Residual Soil
| British Library Conference Proceedings | 2022
Observation on tied-back soldier-pile and timber-lagging wall
| Engineering Index Backfile | 1967