Analysis of the Bearing Capacity of Screw Piles with the Addition of Liquid Cements to Sand

Abstract: Foundations are crucial for the strength of a building's structure. With the advancement of technology, market demand for foundation materials is increasingly seeking those that are more economical, easy to work with, and easy to accommodate. Along with the development of technology, the use of foundation piles is also accompanied by research examining the advantages of certain materials for application as foundation piles. One such example is foundation piles made from screw piles made from rust-resistant galvanized iron pipes. The process is quite simple: rotating the pipe in the direction of the screw shape will force the pile into the ground. This became the background for researchers to test screw piles by applying test loads plus the addition of a cement slurry around the screw pile. Tests were conducted on screw piles with diameters of 7.5 and 10 cm, both non-grouted and grouted. This resulted in an increase in ultimate bearing capacity of 1 to 1.2 times the load for screw piles with a diameter of 7.5 cm and 1.2 to 1.36 times the load for screw piles with a diameter of 10 cm. So, the addition of cement liquid (grouting) to the screw piles installed in the sand significantly increases the bearing capacity.