INFLUENCE OF THIN SAND SEAM LAYER ON CONSOLIDATION BEHAVIOR OF SOFT SOIL

Abstract

A thin layer of sand in the soil is a layer of sand that is much thinner than the thickness of a weak soil layer. In nature, the thin sand layer is often formed in the sedimentation process along rivers or coastal areas. In soil-filling projects, a thin layer of sand is also used between weak soil layers with low permeability to speed up the consolidation process. The presence of a thin sand layer greatly affects the consolidation settlement and the development of the strength of weak soil. However, previous studies have not focused much on the influence of thin sand layers on the behavior of soil such as load-bearing capacity and settlement over time. Therefore, the main objective of this study is to conduct a series of consolidation settlement tests to investigate the settlement behavior over time for cases with and without thin sand layers. The results show that the thin sand layer plays a significant role in increasing the consolidation rate and the stiffness of the weak soil layer.