Lateral response of pile foundations in liquefiable soils

Abstract

a b s t r a c tLiquefaction has been a main cause of damage to civil engineering structures in seismically active areas. The effects of damage of liquefaction on deep foundations are very destructive. Seismic behavior of pile foundations is widely discussed by many researchers for safer and more economic design purposes. This paper presents a pseudo-static method for analysis of piles in liquefiable soil under seismic loads. A freefield site response analysis using three-dimensional (3D) numerical modeling was performed to determine kinematic loads from lateral ground displacements and inertial loads from vibration of the superstructure. The effects of various parameters, such as soil layering, kinematic and inertial forces, boundary condition of pile head and ground slope, on pile response were studied. By comparing the numerical results with the centrifuge test results, it can be concluded that the use of the p-y curves with various degradation factors in liquefiable sand gives reasonable results.

Ground improvement using an expandable polyurethane resin

“…Furthermore, in particular situations, the settlement of constructions occurs in a soil which contains organic materials or acids which might react with the materials of the method used for the ground improvement. The speed of the stabilization method plays an important especially in vital roads or aerodromes and other types of constructions where long treatment process at these sites might be not effective leading to close the job sites causing many problems [17][18][19][20] An innovative alternative method is the soil injection technology using an expandable polyurethane resin which improves the properties of the soil rapidly beside lifting and remediation of the constructions built on it.…”

Study on Liquefaction Resistance of Pile Group by Shaking Table Test

“…Mokhtar et al [25] study the seismic performance of piles penetrated into liquefiable sandy soil by the 3D finite element program. Janalizadeh et al [26] established a three-dimensional finite element model by open-source computer-traditional platform OpenSees and studied the influence of soil layer delamination, movement force, and inertia force on the dynamic response of pile. e above research is limited to the dynamic response characteristics of pile group foundation in liquefaction site.…”

Soil Injection Technology Using an Expandable Polyurethane Resin: A Review

“…As a result, it leads to the appearance of the foundation's imperfections threatening the whole overlaying constructions status, varying from minor defects to the collapse of the construction due to the foundation's failure. According to the following authors [7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22]28,39,[47][48][49][50][51], these factors could be sorted as Collapsible/Metastable soil, Liquefiable Soil, Expansive soil, Slope instability, seismic impact, seasonal variation of ground water level, and other natural geological and environmental reasons [52][53][54][55][56][57][58][59][60] • Industrial (technical) reasons: summarized as complex factors caused by engineering errors, such as inadequate preliminary design, insufficient or incorrect geotechnical investigations, poor quality of construction work, violation of building codes, and poor soil compaction during the construction process. In addition, there are aspects related to changes in the capacity concerning a particular project, the poor quality of the construction materials, reconstruction processes, cities planning and developments, the insufficient distance between the adjacent foundations, vibration effect of the neighborhood construction equipment, the changes in the groundwater level due to inappropriate seepage network, and other factors.…”