Analysis And Parametric Study Of Deep Excavation With Shoring Pile

Abstract

ABSTRACT The demand for open space in urban areas has increased rapidly in recent years around our country, especially in Addis Ababa. This rapid development has not been matched by the ever decreasing open space commonly associated with urbanization. To fulfill the need for open space in urban centers; a deep excavation into the ground is very crucial. Hence it will provide an open space for different purpose, including parking lots, stores, basement and public utilities, etc. In multi story buildings, Deep excavation should be stable and to limit deformation to acceptable level. Ground deformation around excavation can damage adjacent building streets and public amenities. Thus, it is critically important to accurately predict the damage potential of nearby deep excavations and designing adequate support systems. This thesis will describe the analysis and parametric study of shoring as deep excavation support system. A detailed analysis of deep excavation supporting System using PLAXIS 2D will be performed in this study. The objectives of this study are to investigate the effect of different parameters on the prediction of ground movement by numerical analysis and to develop a method of estimating these effects quantitatively around deep excavation. Extensive review of relevant literature published in the past four decades was conducted in order to understand the trends and the key developments in this area. It was revealed from the literature review that the concurrent use of the observational method and the finite element method for monitoring and controlling of ground deformations around the excavation has become a norm for deep excavation projects. This study presents details of different parameters with deep excavation. Parametric study has been conducted to analyze the effects of surcharge and its location, pile diameter and wall embedment depth on horizontal displacement, vertical deformation and bending moment of the support system. Analysis results and discussion from the study are also presented with details of constitutive soil model used during analysis to analyze the suitability of shoring pile wall as deep excavation support system during deep excavation and provide helpful first estimate of probable damages caused on adjacent structures due to excessive excavation. Recommendations for future work are also presented at last.