Ground Improvement of Mongla Container Yard in Bangladesh

Abstract

In the context of constructing container yards on soft soil layers, it often becomes necessary to undertake ground improvement works to mitigate potential settlement caused by anticipated dead and live loads. In situations involving substantial accumulations of soft and compressible clay deposits, it becomes imperative to expedite the process of consolidation. The utilization of prefabricated vertical drains in conjunction with preloading is a commonly employed technique for ground improvement in such scenarios. In the context of ground improvement projects involving soft soil, it is necessary to determine the extent of improvement accomplished in the soft, compressible clay. This assessment assists in verifying if the soil has reached the desired level of consolidation, hence allowing for the removal of preloading measures. The analysis can be conducted using observational methods, wherein continuous records of ground behavior are monitored starting from the date of equipment installation. Field instruments are employed to validate the efficacy of soil improvement activities and to guarantee that the prescribed level of consolidation resulting from the sandfill and surcharge loading has been attained before the removal of the preloading. This paper presents a comparative analysis of different approaches used to assess the degree of consolidation in a case study conducted at the Mongla Port container yard project in Bangladesh