Continuous Surface Wave (CSW): Services from the ground, down
Principle of Operation
The seismic energy source of the continuous surface wave equipment, with operating range of 5-100 Hz, produces surface or ‘Rayleigh’ waves which propagate across the ground surface. These are detected by the system of geophones and analysed by the software. The laptop-based software uses the data to provide a stiffnes vs depth profile. Office based post-processing can provide shear wave velocity profiles, and subsequently mechanical properties of the ground such as shear modulus and elastic (Young’s) modulus.
Our Continuous Surface Wave testing equipment provides a detailed, economic method of ground stiffness profiling without the requirement for intrusive works.
The equipment consists of:
- An oscillating seismic energy source or ‘shaker’ capable of frequencies as low as 5Hz with a 0.1Hz resolution.
- A system of geophone sensors which detect the generated surface waves .
- Control unit and amplifier.
- USB connection to laptop.
- Provides depth profiling up to 30m.
- Achieves rapid results whilst avoiding invasive testing.
- Enables measurement of ground stiffness with strong correlation to the results of CBR & SPT testing.
- Automated test software allows customisable testing for areas of interest.
- Lightweight and portable.
- Computer Interface: USB Connection
- Data Acquisition: 16 Bit
- Unit Dimensions: 400 x 380 x 150mm
- Seismic Energy Source Dimensions: 450 x 350 x 180mm
- Power: 12-24 VDC or 110 VAC
- Control Unit Weight: 10kg
- Seismic Energy Source Weight: 70kg