Evaluation of the effectiveness of methods of compaction of sandy soil using physical modeling in the laboratory

Abstract

Abstract. Surface compacting of soils is one of the measures applied in the practice of construction for the improvement of deformation and strength indicators of soil characteristics. Compacting is used both in creation of artificial bases in the shape of sand blankets and in quality enhancement of sand matresses for constructions as an underlying and levelling layer within road surface. For creation of surface compacting at a site various methods dependent on machines and mechanisms being used are applied: tamping, rolling, vibrocompaction. The research has been executed for evaluation of the efficiency of the indicated means of compacting. The set task was solved in laboratory conditions on physical models in a laboratory tray. In the course of the research the special laboratory tray was made, sandy soil model was chosen, with the help of additional equipment and developed original methodology a modelling of three methods of surface compacting was done, experiments on compacting of physical models with different soil dampness were executed, quantitative and qualitative assessments of surface compacting of sandy soil were given. On the bases of the conducted experiments the most efficient means of surface compacting of sandy soil was found. Recommendations for builders were given.

Soil Density and Optimum Moisture for Soil Compaction in Five Soil Classes in Western Bahia State

“…Compaction rearranges the primary soil particles as well as their aggregates, therefore reducing the porous space and increasing its density (HAMZA; ANDERSON, 2005). The increase in the density resulting from the reduction of this porous space and the consequent reorganization of the aggregates impairs the adequate diffusion of gases (JESUS et al, 2017), resulting from the respiration process of the roots and soil microbiota (SILVA et al, 2015 ;TONIAZZO et al, 2018).While there is an attempt in farming to perform activities when the water content in the soil is beyond the wot range, this situation is almost always sought in civil engineering in an attempt to have the constructions that are as much steady as possible, including alternative methods to obtain the desired humidity when compacting land for construction of buildings or roads (MALTSEV et al, 2017). Thus, the determination of wot becomes important for both agricultural sciences and civil engineering.…”