Geotechnical Drilling, Sampling and Field Testing

Reliable ground information is the starting point for every safe foundation, road, industrial facility, and infrastructure project. GPL supports consultants, contractors, and project owners with geotechnical drilling, representative soil and rock sampling, and field testing that turn subsurface uncertainty into clear engineering decisions.

Our field teams combine experienced drilling crews, practical site coordination, and proven testing procedures to deliver dependable data for foundation design, earthworks, groundwater assessment, slope evaluation, and construction quality control.

Why Clients Choose GPL

  • Integrated field investigation, sampling, and laboratory testing support.
  • Experienced crews for soil, rock, and mixed ground conditions.
  • Clear reporting inputs for consultants, designers, and contractors.
  • Flexible mobilization for building, road, infrastructure, and industrial projects.

Penetration and In-Situ Testing

We provide in-situ testing to evaluate soil resistance, density, consistency, and ground behavior directly in the field.

  • Cone Penetration Test with Electrical Piezocone (CPTU)
  • Cone Penetration Test with Electrical Seismocone
  • Dynamic Cone Penetration Test (DCPT)
  • Standard Penetration Test (SPT)
  • Cone Penetration Test (CPT)

Field Testing for Design Confidence

Plate load testing for foundation and pavement design Field density testing for earthworks quality control

  • Plate load testing for bearing capacity and settlement assessment.
  • Field CBR for pavement and road design support.
  • Field density testing for compaction control and earthworks acceptance.
  • Speedy moisture testing and Electrical Density Gauge (EDG) checks.

Permeability and Groundwater Assessment

Our permeability and hydraulic tests help evaluate seepage behavior, groundwater influence, and drainage requirements for foundations, excavations, and infrastructure works.

  • Constant head and falling head permeability tests.
  • Single and double packer permeability tests in boreholes (Lugeon tests).
  • Infiltration and percolation testing.

Sampling Facilities

Geotechnical drilling and soil sampling works

  • Triple and double tube core barrels for hard soil and rock coring.
  • PQ, HQ, and NQ wireline core barrels.
  • Large-diameter split barrel samplers for bulk samples.
  • Split barrel tubes with cone accessory for SPT.
  • Thin-wall Shelby tubes, piston samplers, rods, augers, casing, pumps, DTH hammers, groundwater samplers, and bailers.