Geological Mapping & Analysis

Geological mapping and analysis form the foundation of successful geotechnical investigations. At Atlas Engineering and Technology Group (AETG), we provide comprehensive geological mapping services to identify and characterise subsurface conditions critical for construction and infrastructure projects in Sydney and throughout Australia. Our detailed approach to geological assessment minimises risks associated with ground uncertainty and helps clients make informed decisions.

Why Geological Mapping Matters

Understanding the geological framework of a site is essential for:

  • Identifying potential geohazards before construction begins
  • Optimising foundation designs based on actual subsurface conditions
  • Reducing project costs by minimising unforeseen ground-related delays
  • Ensuring long-term stability and performance of structures
  • Supporting environmental compliance and sustainability goals

Our Geological Mapping & Analysis Services

Our team of experienced geologists and geotechnical engineers utilises advanced mapping techniques and analytical tools to deliver accurate, comprehensive assessments of site conditions. Our geological mapping services include:

  1. Surface Geological Mapping - Detailed field mapping of outcrops, landforms, and surface features
  2. Subsurface Geological Interpretation - Analysis of borehole data to develop cross-sections and 3D models
  3. Remote Sensing Analysis - Utilisation of satellite imagery and aerial photography for preliminary assessments
  4. Geophysical Survey Integration - Correlation of geophysical data with geological observations
  5. Structural Geological Analysis - Identification and characterisation of faults, joints, and other discontinuities
  6. Lithological Classification - Detailed description and categorisation of rock and soil types
  7. Weathering Profile Assessment - Evaluation of weathering depths and patterns across the site

Our Approach

We employ a systematic methodology that combines field investigations, laboratory testing, and advanced analytical techniques:

  1. Preliminary Desktop Study - Review of existing geological maps, previous investigations, and historical data
  2. Field Reconnaissance - Initial site visit to identify key geological features and plan detailed investigations
  3. Detailed Field Mapping - Systematic documentation of geological units, structures, and features
  4. Integration with Subsurface Data - Correlation of surface observations with borehole and test pit findings
  5. Advanced Analysis - Application of geological principles to interpret site conditions
  6. Comprehensive Reporting - Clear documentation of findings with implications for design and construction

Benefits of AETG Geological Mapping Services

Working with Atlas Engineering for your geological mapping needs provides:

  • Risk Reduction - Early identification of geological hazards and constraints
  • Cost Efficiency - Optimised investigation programs focused on critical areas
  • Design Optimisation - Tailored foundation and excavation solutions based on actual conditions
  • Construction Planning - Improved scheduling and methodology selection
  • Long-term Performance - Enhanced structural stability through accurate ground characterisation

Our Technology and Tools

Our geological mapping utilises state-of-the-art technology:

  • Digital mapping tools and GIS software
  • Advanced 3D geological modelling programs
  • Photogrammetry and drone-based mapping capabilities
  • Integration with BIM for construction planning

Successfully Completed Jobs by AETG to Date

✔ Proposed Mixed-Use Development - Queen Street, Campbelltown NSW

Based on the Geotechnical Design Report for the Shoring System at Queen Street, Campbelltown, prepared by AETG. The slope stabilisation strategy centres around the careful design and modelling of shoring systems to control soil movement and maintain excavation safety during the construction of a deep double-basement and high-rise development.

The report addresses slope stabilisation through a combination of anchored and cantilevered soldier pile systems, reinforced with shotcrete walls and analysed using PLAXIS 2D finite element modelling. The aim was to control lateral soil movement, limit pile deflection, and ensure stability of adjacent infrastructure, including Sydney Water assets.

Each shoring section was tailored based on subsurface profiles which revealed shallow fill, residual silty clay, and weathered shale bedrock. Sections with higher risk, such as those near footings or utility lines incorporate ground anchors to reduce movement.

The PLAXIS modelling outputs indicated that while some sections exceeded the alert threshold for soil and pile movement (>12 mm), these movements were controlled after activating structural restraints like slabs and anchors. In the most stable section, final long-term deflections remained minimal, confirming effective slope and excavation face stability. Stress analyses on nearby water infrastructure showed negligible impact, affirming that the stabilisation measures also protected external assets.