Effect of dynamic earth vibration on the behavior of laterally loaded single pile embedded within unsaturated soil

Abstract EN

Most of the studies of laterally loaded piles focused on the behavior for pilessubjected to static or cyclic lateral loading embedded within dry or saturated soils, few studies investigate the behavior of piles embedded within partially saturatedsoils and subjected to dynamic loads.

In this research, an experimental studypresents an aluminum pile model embedded within dry, fully saturated andpartially saturated soils, subjected to dynamic load with the El Centro 1940 NSacceleration data (0.05g, 0.15g, and 0.32g) accelerations.

Three different loweringlevels of the water table for fully saturated soils model is achieved to get partiallysaturated soils of three different values of matrix suction.

During an earthquakemodel, a liquefaction phenomenon is observed by boiling of sand and completedcollapse in the soil as shown in the results.

It is concluded that the resisting to thebending moment reduced by 22% , 50% , and 57% after 1st, 2nd and 3rd loweringof water level respectively, than that of the saturated condition.

This reductionapproaches to 28% for completely dry soil.

It is worth to mention, that, thedeflection of the pile reduced as the lowering of water level increased.

The soilresistance increases with the increasing of dynamic load acceleration.

The soilresistance increases about 35% when the acceleration increase from 0.05g to 0.15gand an increase of about 22% when the acceleration increases from 0.15g to Most of the studies of laterally loaded piles focused on the behavior for pilessubjected to static or cyclic lateral loading embedded within dry or saturated soils, few studies investigate the behavior of piles embedded within partially saturatedsoils and subjected to dynamic loads.

In this research, an experimental studypresents an aluminum pile model embedded within dry, fully saturated andpartially saturated soils, subjected to dynamic load with the El Centro 1940 NSacceleration data (0.05g, 0.15g, and 0.32g) accelerations.

Three different loweringlevels of the water table for fully saturated soils model is achieved to get partiallysaturated soils of three different values of matrix suction.

During an earthquakemodel, a liquefaction phenomenon is observed by boiling of sand and completedcollapse in the soil as shown in the results.

It is concluded that the resisting to thebending moment reduced by 22% , 50% , and 57% after 1st, 2nd and 3rd loweringof water level respectively, than that of the saturated condition.

This reductionapproaches to 28% for completely dry soil.

It is worth to mention, that, thedeflection of the pile reduced as the lowering of water level increased.

The soilresistance increases with the increasing of dynamic load acceleration.

The soilresistance increases about 35% when the acceleration increase from 0.05g to 0.15gand an increase of about 22% when the acceleration increases from 0.15g to 0.32g.