Water Table Effects on the Behaviors of the Reinforced Marine Soil-footing System

Abstract

This study evaluates the effects of a water table on the behaviors of a geogrid reinforced soil-footing system on marine soft soil layers in Qeshm Island, Iran. The main aim of this research is to recommend the optimum specification of the reinforced soil-footing system. A series of geotechnical tests were adopted to measure the properties of the soil profile. The impacts of the water table and the geogrid layer specifications were evaluated by the finite element analysis to investigate the system’s behaviors. Finally, the optimal reinforced soil-footing is suggested. Doi: 10.28991/HEF-2021-02-03-09 Full Text: PDF

Behavior of Raft Foundation Built on Layered Soil under Different Earthquake Excitation

“…Uncomplicated procedures are presented for assessment bearing capacity and permanent ground deformation below earthquake conditions. Numerical simulation performed by Vali [6] to assess the settlement and safety factor of a reinforced marine soilfooting system on marine soft soil layers on Qeshm Island in the presence of a water table with finite element method used for this study, because of the erratic fluctuations in the water table on such poor soils; it was found the settlement was reduced while the safety factor of the soil-footing system was increased by lowering the water table. Numerical analysis by finite element was conducted by Shafiqu and Abdulrasool [7] to predict the behavior of raft foundation during different excitation of earthquakes, taking into consideration the influence of some parameters, such as raft stiffness and thickness, the maximum lateral displacement of soil under the foundation, vertical settlement, and influence the earthquake acceleration-time records.…”

Finite Element Analysis on Behavior of Single Battered Pile in Sandy Soil Under Pullout Loading

“…It was noted that when the batter angle increases, a pile load-carrying lateral capacity increases until the angle reaches -20°; then, the resistance decrease and as the load inclination angle increased, the total and lateral deformation increases. Vali [8] studied the effects of the water table changes on the behavior of a geogrid reinforced soilfooting system on marine soft soil layers in Qeshm Island, Iran. The impacts of the water table and the geogrid layer specifications were evaluated by the finite element analysis to investigate the system's behaviors.…”

Unconfined Compressive Strength Characteristics of Treated Peat Soil with Cement and Basalt Fibre

“…Various soil improvement techniques such as utilize *Corresponding Author Institutional Email: bayat.m@pci.iaun.ac.ir (M. Bayat) mechanical energy and/or man-made materials have been used to improve the mechanical characteristics of weak or soft soils in practice for many years [4][5][6]. The problems of structures situated on weak or soft deposits are represented by significant settlement, low shear and compressive strength parameters [7][8][9][10][11]. Similar to conventional additive such as cement or lime, natural or synthetic fibres such as cotton, coir, sisal, polypropylene, basalt and polyester may be used to enhance the mechanical characteristics of weak or soft soils [12][13][14][15].…”