Analysis of stability enhancement of soldier pile retaining wall

Abstract

In construction industry, Soldier pile retaining wall with timber laggings is one of the most common retaining walls. It is relatively fastest and cheapest method. Stability of the soldier pile retaining wall is the main consideration during the design and construction period. To predict the lateral wall deformation for excavations, it is important to perform a numerical analysis, because the deflection of the soldier pile retaining wall is critical in practice. In the present study, theoretical analysis and numerical analysis were carried out to analyse the stability of the soldier pile retaining wall with the presence of surcharge. This research mainly focusing on the stability enhancement of the soldier pile retaining wall considering the factors such as, depth of embedment of the steel H-sections, spacing between steel H-sections, width of the steel H-section and soil parameters. Also, this paper presents the results of theoretical study using limit equilibrium method to assess the stability of the wall by considering the factor of safety. And, two-dimensional finite element model (FEM) of soldier pile retaining wall with horizontal timber laggings was created in Plaxis 2D software to estimate the lateral displacement of the wall and bending moment capacity.