Effect of the Excavation Depth on a Low Rise Structure Existing Near a Residential Project in Kolkata
摘要
India is going through a rapid transformation in terms of rapid urbanization and infrastructure development during the last few decades. This rapid transformation is directly affecting the construction industry as the rate of urbanization is very fast. Rapid growth of urbanization has some merits and demerits. It is helping all sorts of communities from an economic point of view, but it is also taking its toll on available free lands. Near future, we will see an inevitable scenario where high-rise and low-rise buildings are coexisting side by side. In this context, we have observed that during the construction of a high-rise structure in Kolkata, a nearby low-rise structure is getting affected. In this study, an effort has been made to observe the settlement of an existing low-rise structure by varying the excavation depth. A numerical study has been used by using PLAXIS 2D finite element software to calculate the settlement of an existing low-rise structure due to deep excavation in the adjacent project site. Soil exploration results obtained from the Flat Dilatometer test (DMT) is used for modeling purpose. Besides we have tried to provide a solution to this problem by conducting two case studies (i.e. Case 1 and Case 2). In Case 1, timber piles are provided along the boundary of the excavation work and in Case 2, diaphragm walls are provided along the boundary of the excavation work. Finally, it is observed that in both the case studies, provision of these shoring methods are able to reduce the amount of settlement of the existing low-rise structure with varying excavation depth.