Proper awareness of the design process essentials allows how the design of screw piles can be influenced.
Screw piles design include:
The installation process of screw piles influences the design.
The process includes standard procedures. It involves progressing the screw pile into the soil. By utilizing a hydraulic torque motor. It yields in helices infiltrating the soil. It rotates through the application of a twisting moment at the shaft head.
The screw pile installation process not only holds the application of torque. but also has the application of downward pressure and called crowd. It further facilitates the installation.
Load transfer in loaded piles
Screw piles design is controlled by the reaction of deep foundations. When it is subjected to applied loading.
During the load transfer to the soil from the screw pile. The load transmitted to the helical plates in the form of bearing resistance. It is much bigger than the shaft resistance.
Use of Standard Penetration Test (SPT) and the Cone Penetrometer Test (CPT)
N value obtained from the SPT is an important parameter. Because of its implications toward the incidence of limitations. Also, the link to the speed of installation.
The screw pile ultimate capacity, and the screw pile embedment depth.
CPT infer the soil properties of the soil profile under testing. Where the assessed penetration resistance is related for the installation torque need. Also, for the compressive or tensile power of the pile.