Design and construction of soil nail reinforced soldier pile wall as a temporary shoring system for deep excavation - a case study

This paper discusses design and construction of an innovative shoring system known as soil nail reinforced soldier pile wall to support a temporary excavation at an actual construction site. The excavation works consisted of an existing wall of 7 m high, followed by a 5-m-high proposed wall located below the existing wall which were further complicated by other site constraints. Results showed that the soil nail reinforcement could effectively restrain the deformation of the soldier pile wall and cut-off potential deep-seated slip planes. The system also enabled more working space in front of the wall as no waler beam and anchorage head were required. Both finite element stress-strain analysis and limit equilibrium slope stability analysis showed reasonably good agreement with the field monitoring results. The wall deformed 6-65 mm over a 8-week period with the deformations generally stabilized 10 days after the wall completion.