Our drilling rigs can extract undisturbed core samples from depths exceeding 30 meters. Each borehole is logged continuously for grain size, moisture content, and density, giving engineers a precise vertical profile of load-bearing strata. This data directly informs foundation design for heavy machinery pads and industrial structures.

We follow ASTM D1586 standards strictly. Our crews record blow counts at every 150 mm interval over a 450 mm drive. The N-value is the sum of the last two 150 mm increments. These values are then correlated with soil density, friction angle, and undrained shear strength to assess bearing capacity and liquefaction potential under dynamic loads.

Grout injection is ideal when conventional excavation is impractical — for example, retrofitting existing foundations, working under operational equipment, or treating loose soils at depth. We inject a cementitious slurry under controlled pressure to fill voids, displace pore water, and consolidate the soil mass. The result is increased stiffness and reduced permeability without removing the existing ground.

The slurry formulation depends on soil conditions and target strength. Typical water-to-cement ratios range from 0.5 to 0.8 by weight. We adjust the mix based on in-situ moisture, void ratio, and required final stiffness. Each batch is tested for viscosity and setting time before injection to ensure consistent results across the treatment zone.

A single borehole with SPT at 1.5 m intervals and continuous sampling to 30 m depth typically takes one to two working days, depending on ground conditions. We coordinate with site schedules to minimize disruption. Full reports including logs, N-value plots, and bearing capacity calculations are delivered within five business days after fieldwork.