Field tests on behaviors of geogrid-reinforced lime treated soil retaining walls

Monitoring of a geogrid-reinforced lime treated soil retaining wall of Baoding-Cangzhou Highway in Hebei Province is carried out by use of field tests.The monitoring includes the vertical foundation pressure and lateral earth pressure of the reinforced soil wall facing and the tensile strain in the reinforcement.The vertical foundation pressure of reinforced soil retaining wall is non-linear along the reinforcement length,and the value is less than the theoretical one and will reduce with the decrease of time.The maximum value of the vertical foundation pressure is near the facing.The measured lateral earth pressure within the reinforced soil wall is non-linear along the height and the value is less than the active lateral earth pressure.The distribution of tensile strain in the geogrid reinforcements within the wall is a single peak value and the value is less than 0.6%.These monitoring results can be used as a reference for future study and design of geogrid-reinforced soil retaining wall systems.