A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Results of Lateral Load Tests on Micropiles
Results of ten lateral load tests conducted on micropiles are presented. The micropiles were 15.2 m long and reinforced with a centered high-strength threaded bar along the entire length. Bending stiffness and capacity in the upper 9 m of the micropile were increased by including a 244 mm-OD casing with a 13.8 mm thick wall. Lateral load behavior measured during the load tests were compared with behavior predicted using conventional p-y methods originally developed for laterally loaded piles. Predicted and measured displacements usually agreed within 10 percent. Most of the lateral load tests were terminated when lateral displacements exceeded the displacement capacity of the jacks; however, two of the ten micropiles experienced excessive displacement at relatively small lateral load. Excavating beside these two micropiles revealed that excessive rotation occurred at the threaded connection in the casing about 2 meters below the ground surface. The threaded connections in these two micropiles experienced excessive rotation at one-fourth of the first-yield moment as determined from structural tests on an intact casing.
Results of Lateral Load Tests on Micropiles
Results of ten lateral load tests conducted on micropiles are presented. The micropiles were 15.2 m long and reinforced with a centered high-strength threaded bar along the entire length. Bending stiffness and capacity in the upper 9 m of the micropile were increased by including a 244 mm-OD casing with a 13.8 mm thick wall. Lateral load behavior measured during the load tests were compared with behavior predicted using conventional p-y methods originally developed for laterally loaded piles. Predicted and measured displacements usually agreed within 10 percent. Most of the lateral load tests were terminated when lateral displacements exceeded the displacement capacity of the jacks; however, two of the ten micropiles experienced excessive displacement at relatively small lateral load. Excavating beside these two micropiles revealed that excessive rotation occurred at the threaded connection in the casing about 2 meters below the ground surface. The threaded connections in these two micropiles experienced excessive rotation at one-fourth of the first-yield moment as determined from structural tests on an intact casing.
Results of Lateral Load Tests on Micropiles
Long, James (author) / Maniaci, Massimo (author) / Menezes, Glen (author) / Ball, Rory (author)
GeoSupport Conference 2004 ; 2004 ; Orlando, Florida, United States
GeoSupport 2004 ; 122-133
2004-01-23
Conference paper
Electronic Resource
English
Soil mixing , Illinois , Drilled shafts , Bridges , Soil nailing , Micro piles , Missouri , Load tests , Foundations , Remediation , Lateral loads
Results of Lateral Load Tests on Micropiles
| British Library Conference Proceedings | 2003
Full-scale load tests on instrumented micropiles
| Online Contents | 2004
Full-scale load tests on instrumented micropiles
| British Library Online Contents | 2004
Soil Arching Effect in Sand Reinforced with Micropiles Under Lateral Load
| Online Contents | 2016
Lateral Loads on Pin Piles (Micropiles)
| British Library Conference Proceedings | 2003