Abstract
Abstract The design of shallow foundations on swelling soils needs a thorough study to evaluate the effect of swelling potential soil on the final foundation heave. For this reason, a simple analytical approach based on the soil stress state under the foundation can be used to calculate the foundation heave. This paper reports a set of analytical and numerical analysis using the finite-difference code (FLAC 3D), performed on an isolated shallow foundation founded on a swelling soil mass at N’Gaous city in Batna Province, Algeria, subjected to distributed vertical loads. Further, the influence of some parameters on total heave was analyzed, such as the embedded foundation and soil stiffness. The analysis results from the proposed 3D modelling was compared and discussed with analytical results. The numerical results obtained show a good agreement with the analytical solutions based on oedometer tests proposed in the literature, and deliver a satisfactory prediction of the heave of the shallow foundations.
Highlights
A swelling soil is generally defined as a soil that has a potential to increase in volume under increasing water content.[1,2] Clay soils consist of various minerals with a high affinity for water such as kaolinite, illite and montmorillonite
Be set to ten atinmdesshethaer setqifufnivesasleKnst=1s0ti8ffPnae/sms .oAfctchoerdsitnifgfetostItnaesicgah,[b33]oaringanzdonNee.lsTohneaanpdpMariellnert,[1] within a percentage difference of good rule-of-thumb is that Kn and Ks be set to ten times the approximately 2%, for example, for total heaving at the a zone in theeqnuoirvmalaelndt isrteifcftnioesnsios:f the stiffest neighboring zone
Swelling soil was modeled in the initial state by the was under the found1a4tion, where the total stresses σz,t was simulation of swelling pressure
Summary
A swelling soil is generally defined as a soil that has a potential to increase in volume under increasing water content.[1,2] Clay soils consist of various minerals with a high affinity for water such as kaolinite, illite and montmorillonite. Soil-structure interaction is assured by the foundations, which have the important role of transferring loads to the supporting soils For this reason, when studying the foundation swelling soils of a construction, should interest with their mechanical behavior under the applied loads, take into account that swelling strain of clay soils occur over time as a function of soil properties[9] (e.g., mineralogy, structure, suction, plasticity and dry density, permeability), the environmental conditions (e.g., moisture variations, climate, vegetation).[10]. Few studies are found providing a detailed behavior of shallow foundations on swelling soils using 3-D numerical modelling This is due to the lack of a particular behavior model of swelling soil in recent years. The majority of damaged structures with low stiffness are based on this type of shallow foundations All these reasons made us choose 3-D numerical modeling. The numerical results obtained were compared with the analytical results proposed in the literature
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
