Analysis of solutions for projected landing foundation on soft soil on BR-381: a case study

Abstract

Soft landfilling is still a major challenge for geotechnical engineering, including road engineering. These soils present great constructive difficulties because of their peculiar characteristics, such as low carrying capacity and high compressibility. Several techniques have been adopted in landfill foundations on soft soils to accelerate and stabilize the settlements, and each one has advantages and disadvantages on its use, depending on the analyzed case. This article presents a case study of a soft soil landfill foundation along highway BR-381 (Fernão Dias) – North Road. The place under study is 120 meters long and had a settlement in the road caused by the presence of compressible soil in its subgrade. To solve the problem, the settlements versus time were analyzed in four geotechnical solutions. After carrying out the analyses and computational studies for proposed solutions, it was concluded that only two of them could be performed for the case studied, mainly, the use of deep drainage of the foundation on the landfill or application of temporary overweight.

Keywords:
landfill foundation; soft soil; computational study