Influence of Building Load on Braced Excavation of Dhaka Subway

Abstract

The stability of a braced excavation and nearby ground surface depends primarily on the properties of struts (number of struts, stiffness of a strut and their vertical and horizontal spacings), strut prestressing, different combination of strut arrangement, properties of the retaining wall (depth of penetration below the final cut level and stiffness), foundation of nearby structures, excavation width and water table level. Hence it is required to consider the impact of the above factors on wall and ground movement of braced excavation to determine the optimum results in terms of force in the struts, moment developed in the wall, deflection of the wall and the displacement of the adjacent ground surface. A number of research work has been carried out in the past and are still ongoing to evaluate the effect of excavation component properties on braced excavation but none of these works emphasized the effect of nearby building foundation on Braced excavation. Hence in this thesis book, we will determine the influence of building foundation on Braced Excavation of Dhaka Subway considering groundwater drawdown and Slip elements along diaphragm wall.