Field Performance of Nailed Soil Wall in Residual Soil

Abstract

A soil nailing technique was used to stabilize a 9-m-deep permanent cut in residual soil for an expressway project in Singapore. This paper describes the construction details, instrumentation, and performance of the nailed soil wall and the results of a field pullout test on a grouted nail. Results of numerical analysis are compared with the measured performance of the wall. The nailed soil wall performed well. Postconstruction performance of the wall showed moderate increase in wall displacements and nail forces due to loss of soil suction resulting from seepage of rainwater into the soil.