Our investigation process typically includes drilling using a purpose built geotechnical drill rig to collect soil and rock samples. Laboratory testing is then undertaken on recovered samples to determine the materials’ properties such as density, strength, and compressibility of soils and strength, weathering, defect characteristics of the rock mass. The investigation may also include in-situ tests such as cone penetration testing for sites with deep alluvial soils. The results of the field investigation and laboratory tests are used to determine the capacity and load-bearing capacity of the soil or rock in accordance with AS2159 piling code, which is crucial for designing the pile system.
The engineers incorporate the information and recommendations gathered by the geotechnical engineer during the investigation to determine the type and number of piles required, as well as the pile length, diameter, and spacing. For sites with complex foundation requirements (eg pile groups, piles subject to high lateral loads), the geotechnical engineers will work with civil/structural engineers to undertake soil-structure interaction to check convergence of structural / geotechnical solutions and in doing so often resulting in an optimised foundation solution. Finite element software is often used by the geotechnical engineers in the soil-structure interaction process.
Pile system investigation and design are critical steps in ensuring the safety and stability of structures. The Australian Standard AS2159 provides guidance on how to investigate and design pile systems to ensure that they are able to transfer loads from the structure to the underlying soil or rock.
At Hunter Civilab, we are committed to providing quality and reliable geotechnical engineering services. Contact us to discuss your pile system investigation, design and inspection needs.