Bearing Capacity of Square Footing Resting on Layered Soil

Abstract

The bearing capacity of layered soil studies was carried out with various approaches such as experimental, theoretical, numerical, and combination of them. This work is focused on the settlement and bearing capacity of shallow foundations subjected to the vertical load placed on the surface of layered soils. The experimental part was performed by manufacturing soil cubic container (570 mm x 570 mm x 570 mm). A model square footing of width 60 mm was placed at the surface of the soil bed. The relative density of sand was constant at 60%, and the clay was prepared with a density of 19.2 (kN/m3) and water content of 14.6%. PLAXIS 3D FEM was used to simulate the experimental tests and performing a parametric study. The results showed that there was a good agreement between experimental work and corresponding numerical results. The value of the bearing capacity was obtained from load-settlement curve. The bearing capacity of layered soil showed higher value for footing resting on clay over sand soil. It was found that an increase in the ultimate bearing capacity regarding the clay over sand with increasing in first layer thickness ratio; while, a decrease has been indicated for the sand over clay. The critical depth was found at H = (2-3m), and the failure pattern was not unique for layered soil.

Bearing capacity analysis of cohesive-frictional soil as filling material over soft soil

“…The construction of superstructures on soft soils (labelled as BC soil in Table 1 and properties were taken from [20] requires enhancement of bearing capacity which can be done by replacing the top layer with Cohesive-frictional soils (labelled as A, B, C, D, E, F, G, H in Table 1 and were taken from [19]) with known h1/B ratios of 0.5, 1, 1.5, 2 for the analysis, load-bearing capacity for the settlement of 75mm (maximum settlement for a multi-storied building as per IS: 1904(1986)) and the bearing capacity of 900kN/m 2 for a 15-storied building (Imposed floor loads as per IS 875 part-2) for obtained two layered soil using Plaxis 3D using the properties of soils were represented in Table 1 and The analysis was done by soil models as represented in the Figure 2.…”

Sustainable Use of Tire-Derived Aggregate in the Protection of Buried Concrete Pipes under Combined Soil and Traffic Loads

“…Standard boundary conditions have been used, where the model has been fixed at the base and the sides of the model have been assigned to be free only in the vertical direction and fixed in the other horizontal directions. Many studies that used three-dimensional finite element analysis to model soil-structure interaction problems used these boundary conditions as well [33][34][35][36][37][38][39].…”