This technical specification provides comprehensive guidance for conducting earthworks construction related to road and bridgeworks projects. It establishes detailed procedures for preliminary site activities, including clearing and grubbing, the careful management of topsoil stripping, and rigorous methods for identifying and managing unsuitable material and high-risk soil types like Acid Sulfate Soils. The document specifies strict requirements for major construction processes, outlining appropriate methods for excavation work, the material classification and layer-by-layer construction of embankments, and the subsequent placement and composition of backfill around utilities and structures. Furthermore, the specification details the standards for preparing the critical Subgrade layer, including various treatment types and the required use of stabilisation or drainage materials. Finally, all operations are governed by strict quality system requirements that stipulate conformance rules, detailed testing frequencies, and maximum lot sizes for compaction and material compliance checks.
