Behavior of floating stone columns reinforced with geogrid encasement in model tests

Abstract

The bearing capacity and deformation characteristics of floating stone columns were complicated and are not thoroughly understood. In the present study, a series of experimental model tests of floating stone columns under vertical plate loading was performed. This study investigated the influence of geogrid encasement on the behavior of floating stone columns and provided valuable insight into the load-displacement behavior, bulging deformation, load transfer mechanism, and the radial stress of the geogrid encasement. The test results show that the bearing capacity of the floating stone column was significantly improved due to the geogrid encasement. The column with longer encasement showed higher stiffness at large settlements. The bulging deformation pattern of the column changed with different encasement lengths. More vertical pressure transferred from the top of the column to the bottom of the column due to the existence of the geogrid encasement. The fully encased stone columns developed high radial stress and achieved effective confinement of the column. The bearing capacities of the floating-encased stone columns with different encasement lengths were controlled by bulging deformation instead of penetration failure, which gave confidence that the floating-encased stone columns were an effective method for field construction in extensive soft soils.

Analytical and Experimental Study on Cold-Formed Steel Built-Up Sections for Bending

“…Thus, the load-carrying capability is improved by increasing the bolt spacing within the permissible limits, which eventually depicts similar findings to the literature sources [ 17 , 18 , 19 ].…”

An experimental study on the impact resistance of a new three-wave beam steel guardrail

“…According to Figures 4-8, the maximum deformation of the guardrail with the concrete-embedded post was 568.48 mm when it was impacted by vehicles of different masses and speeds from an angle of 20 °. The result was less than 750 mm, the maximum dynamic deformation specified in the guidelines and standards, reaching Grade 8 protection (Zhang et al, 2020b;Xu et al, 2022a;Xu et al, 2022b;Gu et al, 2022). The impact geometry of the guardrail impacted by the 1.5-t minibus at the speed of 100 km/h from an angle of 20 °is shown in Figure 9.…”

Comparative Study on the Behavior of Reinforced Concrete Beam Retrofitted with CFRP Strengthening Techniques

“…A flexural crack in the B5 beam was reported near the middle of the soffit. The flexural cracks began to expand vertically upward as the load progressed [ 37 , 72 , 73 ], and the beam failed to owe to a steel rupture as seen in Figure 22 a,b, with the CFRP sheets.…”