Method for evaluating the in-plane shear strength of H-steal-reinforced wall-type ground improvement-PPT Presentation

PPT Presentation

Pdf Summary

The presentation examines how installing H-shaped steel affects the in-plane shear strength of wall-type ground improvement used in liquefaction mitigation and perimeter retaining walls.<br /><br />Structural tests applied horizontal loading to improved-soil beams with different H-steel sizes and configurations. The tests compared beams without steel, with H-steel at different ratios of steel depth to beam breadth, and with reinforcing bars connecting the H-steel to the soil-cement. Separate adhesion tests assessed how bar diameter and curing orientation affected bond strength.<br /><br />Results showed that inserting H-steel reduced the ground-improvement beam’s shear capacity, with greater reductions associated with larger H-steel dimensions. Adding reinforcing bars improved adhesion between the H-steel and the soil improvement and helped increase bearing capacity. The tests also indicated that construction and curing conditions influence the bond strength of the reinforcing bars.<br /><br />The study concludes that H-steel installation can diminish the shear strength of wall-type ground improvement, but reinforcement at the steel interface can strengthen adhesion and limit the reduction in shear strength, particularly at the elastic limit.

Keywords

H-shaped steel

in-plane shear strength

wall-type ground improvement

liquefaction mitigation

perimeter retaining walls

horizontal loading

soil-cement beams

reinforcing bars

adhesion strength

bearing capacity