Features
- Accelerated Weight Drop high energy source for efficient, low frequency response
- 24-96 channel land streamer for rapid 2D profiling (1 km per day)
- Modular system – large multichannel arrays possible
- Use of latest analysis software and data interpretation routines
- Active and Passive source data collection
- Add on precision GNSS survey for accurate georeferencing and locational information
- Highly trained and experienced geophysics/geotechnical field and office teams
Advantages
- Rapid site investigation: 1D or 2D Vs Profiles
- Non-intrusive / non-destructive test method - no ground disturbance necessary
- Effective in environments with high background seismic noise
- Sensitive to low velocity layers and velocity inversions at depth
- Rapidly deployed and highly portable
- MASW and SRT data sets may be collected simultaneously
Applications
- Vs profiling for seismic site classification (Vs30), without a borehole
- Ground stiffness evaluations
- Liquefaction assessment, particularly in gravels and cobbles where SCPTu is not possible
- Site reconnaissance prior to drilling and in-situ testing
- Bedrock or glacial till mapping
- Dam and Levee investigations
- Backfill testing
- Ground improvement QA/QC
- Basement and indoor geotechnical evaluations
- Delineation of “soft zones”, potential voids, other anomaly detection
- Linear structure foundation evaluations (rail, highway, pipeline, road)
