Services Offered
- Borehole Drilling (BH)
- Mackintosh Probe (MP)
- Hand Auger Boring
- Standard Penetration Test (SPT)
- Cone Penetration Test (CPT)
- Soil Resistivity Test (SRT)
- Downhole Seismic Test (DST)
- Thermal Resistivity Test (TRT)
- Geotechnical Report (Static & Dynamic)
- Geophysical Survey
Clientele
We are proud to have provided our services to their utmost satisfaction
"First time fit, zero rework & digitally visible"
Soil Investigation Procedure
Borehole Drilling on Land
Site Clearance
Manual Excavation Trial Dig
Piezometer Installation
Subsurface Drilling
Pilot Hole Testing
Soil Sample
Water Level Reading Activity
Backfill Activity
Collecting Water Sample
Mackintosh Probe
Cone Penetration Test (CPT)
Soil Resistivity Test (SRT)
Downhole Seismic Test
Downhole Seismic Objective
- Objective: Measure travel times of P-waves (compression waves) and S-waves (shear waves) from the energy source to the receivers.
- Testing Method: Conducted in a single borehole by drilling a hole to the required depth.
- Wave Travel Direction: Vertical—either downward or upward—depending on the impulse source location.
Down-hole Test:
- Waves propagate downward through soil layers.
- Single wave source placed on the ground surface adjacent to the borehole.
- Receivers are either:
- A string of multiple fixed receivers at known depths.
- A single receiver moved to different depths.
- Connected to a high-speed recording system to measure wave travel time.
- Shear wave velocity determined from the time vs. depth curve.
Up-hole Test:
- Waves propagate upward through soil layers.
- Movable energy source located inside the borehole.
- Single receiver placed on the ground surface adjacent to the borehole.
Cross-hole Test:
- Waves travel horizontally across boreholes instead of vertically.
Downhole Seismic Activity
Geological Log & Well Design
Lesson from the Batang Kali Landslide
