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Site Investigations

Geotechnical and Site Investigations, On shore and Near shore

Project management and Technical services

  1. Site approvals
  2. Site surveys
  3. Site investigation services, geotechnical drilling,  geotechnical testing
  4. Geophysical surveys for site investigation and site characterization
  5. Project management – investigation planning – – budget control
  6. Reporting and analysis
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Site Investigation – Storage Tanks

Scanning Swimming Pool Base for Voiding

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Surveying Bores

Fast effective and proven

Typical Projects

Groundsearch are managing programs from its International Bases to diverse locations such as Mongolia,
Cambodia and Africa. We will work with you to deliver the right solution wherever your project

  • cost effective,
  • results driven,
  • Locally relevant.
  • Adding Value

Visit our website and email us

for more information.

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subsurfaceimaging

  • Basement Depth
  • 3 D plots
  • Technologies
  • Ground Radar
  • MASW
  • Seismic
  • Crosshole surveys
  • Borehole Geophysics
  • Electrical Resistivity Imaging (ERI)
  • www.groundsearch.biz

VALUE ADDING SOLUTIONS FOR INVESTIGATIONS

  • Rock Base and Geotechnical data from MASW
  • Mapping Rock head to 100m or more
  • Determine soil stiffness and strength directly from Geophysical Data
  • Liquefaction Potential
  • Correlate with SPT /Drill Hole and other site information

Contact Info

For general info on project management and consulting contact Grant Roberts:

Ph: +855 10 863111 +6421 710 922

Email: grant@groundsearch.biz

Or fill in our reach out form for more information (survey questionnaire on its way)

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Exploration Services

Groundsearch actively involved with multiple international exploration programs in locations as diverse as Mongolia, Cambodia and Africa, as well as operations throughout New Zealand.

We have a diverse set of capabilities, and a strong base of experience in Asia and surrounds.

 

Grant is a qualified person to report to ASX and TSX stock exchanges. He has sign off against JORC (Australia) amd 43101 (Canada) -- we can provide more details on request

  • Ground and airborne geophysics acquisition and interpretation
  • Satellite imagery interpretation and geological modelling
  • Stream sediment geochemistry
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  • Project generation and development consulting
  • Greenfield/Brownfield program design
  • Auger, Trenching and Pitting and follow up ground geophysics
  • Detailed surveys and drill target generation / resource definition
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  • Preliminary ground investigations
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To achieve this  Groundsearch uses state-of-the-art technologies, experienced senior exploration staff and in-country knowledge. This means projects that are cost effective, results driven, and locally relevant. We will work with you to deliver the right solution wherever your project may be.

With the backing of our established experience in exploration projects throughout New Zealand, Australia, Asia and the Pacific, SSI can manage exploration programs effectively and efficiently.
To discuss what we can do for your project contact Principal Geological Analyst Grant Roberts (grant@groundsearch.biz or +855 10 863111/ +64 21 710922).

Contact Info

For general info on project management and consulting contact Grant Roberts:

Ph: +855 10 863111 +6421 710 922

Email: grant@groundsearch.biz

Or fill in our reach out form for more information (survey questionnaire on its way)

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Bore hole services and Bore Geophysics

Borehole Geophysics

Borehole geophysics has proven to be an indispensable tool for our clients in coal exploration, mineral mining, coal seam gas exploration and scientific research to name just a few. It is an incredible value-adding tool to confirm target depths, characterise overburden, assess dipping angles and much, much more.

Groundsearch uses state of the art combination tools from Century Geophysical Corporation to maximise the information gathered from the hole, while maintaining usability and the convenience to transport the equipment to operate from nearly anywhere (and over the years our clients have occasionally pushed this “anywhere” claim to extremes! – See “Our Projects”) Our most popular tools are listed here, but we can get in a tool to suit almost any endeavour very quickly.

With the backing of a huge amount of experience in exploration projects all over NZ, and a comprehensive support structure, we can manage your borehole geophysics effectively and efficiently. Email us for more information.

Borehole Tools

9239 Dual Density Sonde – Coal Combination Tool

The Series 9239, Compensated Density logging tool uses the two focused density detectors to compute borehole compensated density real time while logging. No post processing required to produce CDL bulk density. Additionally, the tool also records natural gamma, caliper , medium guard resistivity, and borehole temperature.

The 9239 is a very well proven, diverse and reliable tool which is ideally suited for coal exploration as well as a variety of other applications. It delineates coal seams with fantastic accuracy, and can operate inside or outside the water column, and even inside or outside drill rods or casing.

Acoustic Scanner

The Acoustic Televiewer takes an oriented “picture” of the borehole using high-resolution sound waves. This acoustic picture is displayed in both amplitude and travel time. This information is used to detect bedding planes, fractures, and other hole anomalies without the need to have clear fluid filling the boreholes.

The televiewer digitizes 256 measurements around the borehole at each high-resolution sample interval (.005 meters/.02 feet). This data is oriented to North and displayed real-time while logging using the Visual Compu-Log software. Analysis includes color adjustment, fracture dip and strike determination, and classification of anomaly. It allows information to be displayed on the graphical screen, plot, and in report format. Optionally, the tool can be equipped with a natural gamma sensor.

Full Wave Sonic

The Full Wave Sonic tool contains a single transmitter and dual receiver to record formation travel times. The full wave form data is also recorded simultaneously, along with near and far travel times, borehole-compensated delta time, calculated sonic porosity, receiver gains, near/far amplitudes and natural gamma. The sonic or acoustic log uses the basic principle of sound waves traveling through a media. The Century sonic system uses a single transmitter and dual receiver system for recording the travel times of the formation. The receivers are spaced approximately 2 and 3 feet, from the transmitter. Therefore, a 0.3 m (1 ft.) calculation can be made to measure this interval transit time.

9410 Dipmeter

The Dipmeter tool is a formation strike and dip directional probe primarily used in mining and environmental logging applications. Additionally, the tool also records natural gamma, X-Y calipers, and borehole deviation is computed from the slant angle and bearing measurements calculated from the inclinometer and magnetometer sensors. To ensure accurate strike and dip measurements in small-diameter holes, special care should be taken when calibrating the calipers to maximize their accuracy.The image to the right shows a set of dipmeter data with “tadpoles” giving dip and dip direction of the bedding structures. The bed boundary is picked from the current logs. The boundary is then cross-correlated between each pad data and merged to give the dip of the best “plane ” through this data.

Contact Info

For general info on project management and consulting contact Grant Roberts:

Ph: +855 10 863111 +6421 710 922

Email: grant@groundsearch.biz

Or fill in our reach out form for more information (survey questionnaire on its way)

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Ground radar

Ground Radar

What is Ground Radar?

Ground penetrating radar (GPR) is a high-resolution, shallow penetrating geophysical technique.

It gives images of the underground.

Voids, cable, pipes, treasure, geotechnical targets, and geology.

Range ~1m up to 30m or more.

Figure 1, Field surveys

GPR gives accurate images of the shallow subsurface.

Applications include Non Destructive Tests (NDT’s) in construction and roading, utility location, and void detection.

It is versatile and cost effective, and Groundsearch has an impressive track record of successful surveys using GPR.

Contact Info

For general info on project management and consulting contact Grant Roberts:

Ph: +855 10 863111 +6421 710 922

Email: grant@groundsearch.biz

Or fill in our reach out form for more information (survey questionnaire on its way)

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MASW or Soil Stiffness

MASW and Mapping of Shear Wave Velocity

What is MASW?

Multichannel Analysis of seismic waves

Shear Wave velocity ( Vs). Vs is one of the elastic constants , ( Young’s modulus). V

Vs is an indicator of the ground strength (stiffness) and load-bearing capacity.

  • Rock head Depth
  • Soil Stiffness
  • Void Location

A method to map soils strength without drilling.

Measure the Shear wave velocity of the soils using a geophysical survey and very smart processing.

Fill in gaps between drill holes – corelate to SPT hammer data and soil strength data.

A very powerful and fast geophysical method.

Active mode – to 25m

Passive mode to more than 100m. No need for sources uses natural ground noise source

VALUE ADDING SOLUTIONS FOR INVESTIGATIONS

  • Rock Base and Geotechnical data from MASW
  • Mapping Rock head to 100m or more
  • Determine soil stiffness and strength directly from Geophysical Data
  • Liquefaction Potential
  • Correlate with SPT /Drill Hole and other site information

Multichannel Analysis of Shear Wave data or MASW

MASW is a non-destructive method use advance or as adjunct to drilling to give soil and rock depth and soil strength.

Contact Info

For general info on project management and consulting contact Grant Roberts:

Ph: +855 10 863111 +6421 710 922

Email: grant@groundsearch.biz

Or fill in our reach out form for more information (survey questionnaire on its way)

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Resistivity Imaging

Resistivity Imaging

Multi-electrode resistivity surveys allow for the collection of depth and volume information of subsurface structures through electrical measurements at the surface. This represents a versatile non-invasive method to accurately assess a wide variety of subsurface features. Electrodes are arranged in various arrays at the surface, and current is passed through the source-detector system; it is the variations in this transmitted current that is recorded. By varying the electrode separation and location we can obtain information on subsurface changes in soil resistivity and map these variations with position and depth.

Applications of ERI include mineral prospecting, monitoring of ground water flow and archaeology to name a few. It has been employed to determine the extent of saline intrusion at coastal sites, and in void assessment, especially in clay-rich conductive areas where GPR is ineffective.

Using modern equipment and good survey design this method can be rapidly applied over a large area investigating both shallow and deep soil conditions.

Benefits:

  • Large sites can be investigated.
  • Deep soil conditions determined.
  • Non-destructive and non-invasive
  • Portable and environmentally neutral.
  • Enhance the results from previous electromagnetic induction (EMI) surveys

Contact Info

For general info on project management and consulting contact Grant Roberts:

Ph: +855 10 863111 +6421 710 922

Email: grant@groundsearch.biz

Or fill in our reach out form for more information (survey questionnaire on its way)