Effect of Encasement on the Behavior of Granular Piles

Document Type : Original Article


1 Civil Eng. Dep., Menoufia Higher Institute for Engineering and Technology

2 Civil Eng. Dep., Faculty of Engineering, Menoufia University.


Granular piles in very soft soils may not drive significant load capacity because of the low lateral confinement offered by soft soils, which leads to excessive bulging and squeezing of soft clay into the void space. To overcome this problem, geosynthetic encasement of individual granular piles is an effective method to improve the performance of the granular piles as providing additional confinement. The use of recycled aggregates as a pile material offers a practical alternative from economic, technical, and environmental standpoints. This is due to their suitable engineering properties, which allow them to be used as additional materials in several geotechnical applications. The main objective of this research is to investigate the behavior of encased granular piles using different types of aggregate as a granular pile material (basalt, crushed concrete, crushed red bricks and crushed ceramic). In the present research, three series of laboratory model tests using the unit cell concept were performed to investigate the effect of encasement on the behavior of granular piles. For comparison purposes, ordinary granular piles were also tested and evaluated. The results show that the ultimate load capacity of the soft clay soil increased by using the encased granular piles. Economically, using partial encasement is more efficient than using total encasement.


Volume 45, Issue 1
Vol. 45 (1) issued on 15/1/2022 in 6 parts: PART (1) Electrical Engineering, PART (2) Mechanical Engineering, PART(3) Production Engineering, PART(4) Civil Engineering PART(5) Basic Engineering Sciences and PART(6) Architecture Engineering.
January 2022
Pages 65-76