Evaluation of Foundation Settlement under Various Added Loads in Different Locations of Iraq Using Finite Element

Abstract

Settlement is an important criterion in the design of the foundations. It is classifying into immediate (or elastic) settlement and consolidated settlement (primary and secondary). The factors that affect the shallow foundation settlement are the applied loads, soil stiffness, and geometric shape of foundation. Calculations of settlement depend on the parameters of soil which can be obtained from field and laboratory tests. Field and laboratory tests were conducted for twenty three sites in three different regions in Iraq (Mosul, Baghdad, and Basrah). In this research, field and laboratory tests results adopted for two sites from each region depended on the maximum and minimum bearing capacity values. Settlement for each site was calculated using numerical (mathematical) calculations and PLAXIS software under different added loads. The results of settlements beneath the foundation were competing for the sites with maximum value of bearing capacity in Mosul; Baghdad and Basrah. Also, the comparison conducted for sites of minimum bearing capacity value and the results showed different settlement values of each site. The change of settlement values under different loads was linearly in the six sites using numerical (mathematical) calculations. While, the settlement values obtained from PLAXIS software for sites with maximum bearing capacity value showed that Mosul site had the highest value due to the type of soil layers and the difference models of soil used in the software. Basrah site had a settlement value higher than Baghdad site due to the soil layers of sand type only. PLAXIS results for sites with minimum bearing capacity showed that for Basrah site the soil went to failure. While, the settlement values for Mosul and Baghdad sites were close to each other due to have nearly same soil layers. Therefore, high rise buildings could not be used in some sites. Also, soil in some locations and under some added loads needed to be improved before the implementation of any constructions.E. Al-Taie et al. 258

Soil-Foundation Interaction and Its Influences on Some Geotechnical Properties of Sulaimaniyah, Northern Iraq Fine-Grained Soils Utilizing Plaxis 3D

“…It is noticed that the Dabashan sample shows significantly more load-bearing capacity Figure 2, while the Qerga sample showed higher settlement Figure 3 as compared to other selected samples. The results are compiled with the finding of [20][21][22]. However, [11] study achieved that there are significant differences between settlements calculated analytically and by 3D Plaxis.…”

Deformation analysis of cement modified soft clay soil using finite element method (FEM)

“…The finite element analysis for the soil geometry of raft foundation (25 × 60) m under various added loads of 56, 63.5, 68, 75, and 93 kPa studied using the hardening soil model. The computational geometry, the applied loads and the soil model are similar with [ 30 ]. However, the input parameters used in hardening soil model for the simulation are obtained from the experimental result of this work.…”

Prediction of Soil Settlement on Soft Clay Soil Using Normalized Rotational Multiple Yield Surface Framework (Nrmysf)

“…Soil settlement was influenced by the stiffness of soil [2], [4], [9], [22]. The triaxial test has been proposed as an alternative to conventional oedometers for assessing soil settlement since the results for soil stiffness in the triaxial test are less affected by bedding errors.…”