When this service is useful
The right scope depends on your development, site access, ground conditions and the information needed by your project team. This service is commonly used for:
- Temporary soil or rock cuts
- Basement and boundary excavations
- Excavations near buildings, roads or services
- Sites with fill, seepage, weathered rock or variable ground
Temporary and permanent excavation ground assessment
Excavation stability depends on material strength, defects, groundwater, geometry, surcharge, duration and exposure to weather. A generic safe batter angle cannot be assigned without considering these factors.
The assessment should align with the construction sequence and the relevant temporary-works or structural design responsibilities.
Important project and ground considerations
- Cut height, inclination and duration
- Soil, rock defects, fill and seepage
- Surcharge and nearby assets
- Support, drainage, monitoring and construction sequence
What the assessment can include
- Review of survey, excavation geometry, loads and construction sequence
- Site inspection and subsurface investigation where required
- Assessment of soil, rock, groundwater and nearby assets
- Stability analysis proportionate to the risk and available information
- Recommendations for battering, support, drainage, monitoring and verification
What you receive
- Interpreted excavation ground model
- Assessment assumptions and credible failure mechanisms
- Temporary or permanent ground-support recommendations within scope
- Construction controls, inspections and further-work triggers
What to provide for your quotation
The clearest quote starts with enough information to understand your actual project, site constraints and required deliverables.
- Survey and excavation sections
- Shoring or temporary-works concept
- Nearby structures, services and surcharge loads
- Programme and previous ground reports
Excavation Stability Assessments across Sydney and NSW
Assessments are available for suitable excavation projects across Sydney, the Blue Mountains and Wollongong/Illawarra. Ground conditions and approval requirements must always be considered site by site.