Services

Nine investigation disciplines, ordered by the depth each one works at.

Surface

Seismic refraction and electrical resistivity survey to map subsurface layers before a single hole is drilled.

Profile lengths to 500 m Seismograph, resistivity meter, geophone array

0 – 3 m

Determination of vertical settlement and bearing characteristics of soil at foundation level.

Plate sizes 300 – 750 mm Hydraulic jack, reaction load, dial gauges

0 – 30 m

Field and laboratory determination of soil and rock properties, including permeability and groutability.

Full soil and rock suite Packer assemblies, permeability apparatus, field laboratory

10 – 50 m

Ground treatment by driven and bored piles, transferring structural load to competent strata.

Pile diameter 300 – 1200 mm Piling rigs, tripod sets, chisels and bailers

5 – 100 m

Pressure grouting to cut seepage and consolidate rock beneath dams and structures.

Pressures to 40 bar Grout pumps, mixers, packers, automatic recorders

Horizontal

Excavation of exploratory drifts and adits into rock to expose strata at full scale.

Sections to 2 m × 2 m Jackhammers, compressors, mucking and ventilation plant

Full hole

Detailed recording of every formation penetrated, from collar to termination depth.

Any drilled depth Core boxes, logging cameras, downhole probes

To 500 m

Drilling, installation and development of deep tubewells for water supply and dewatering.

Diameter 4" – 12" Truck-mounted rotary rigs, DTH and O-DEX assemblies

To 1000 m

Surface and underground core drilling in all strata, by diesel or electric powered units.

Core diameter 22 – 300 mm Hydraulic feed core rigs, wireline assemblies, double and triple tube barrels

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