Investigation of seismic behaviour in restrained deep excavation by the nailling system by finite element method

The stabilization of deep excavation by using soil reinforcement method by anchors is one of the important issues in geotechnical engineering. The highly suitable performance of nail walls during strong ground movements and as well as flexibility than to other guard structures, such as retaining walls, makes it more obvious that this system should be examined under earthquake effects. Therefore, it is important to study the factors affecting the stability and deformation of the walls of the reinforced by this method under seismic forces. Soil resistance parameters and consideration of the proper values for length, angle and distance between the nails have a direct effect on the stability and deformation of the nail wall. In this study, by studying a case study and using finite element modelling, the effects of a site with two different soil types, one with strong geotechnical characteristics (hard soil), and another with less geotechnical characteristics, on the performance of the restrained wall with Nailing method using dynamic seismic analysis is examined. The results of this study show that taking into account the proper values for the nails parameters (angle, length and distance between the nails) has important implications for design safety and deformation control.

Keywords:

Nailing , Dynamic Seismic Analysis , Finite Element Method