Stress Analysis and Construction Method Proposal based on Change in H-pile Spacing for Soil-Cement Mixed Wall Subjected to Lateral Earth Pressure

Abstract

Several improved techniques for constructing soil-cement wall (SCW) have emerged owing to the advancement of equipment. However, the increasing occurrence of safety accidents can be attributed to the lack of analysis regarding failure behavior and insufficient research on design methods. This study aimed to evaluate the effectiveness of both domestic and international design formulas for the SCW technique in practical applications. It also delved into the theory behind the arch formation and the failure behavior due to lateral earth pressure. An excavation method that can reduce stress, decrease the strength required for on-site mixing, or widen the installation interval for the H-pile was proposed. A case study was conducted to validate the effectiveness of the proposed method. The eccentric steel inclusions for soil cement wall (ESCW) method, which seeks to maximize the arch effect, could reduce stress by approximately 50% compared to the existing SCW.