Geotechnics Philippines Incorporated

Seismic Refraction Survey

ApplicationApparatusProcessed Results
- Obtains the seismic velocity profile of the ground. Data can be utilized to predict the depth of bedrock, rock strength/rippability, and layer thicknesses.

Seismic Reflection Survey

ApplicationApparatusProcessed Results
- Used for mapping layer thicknesses, bedrock levels, topography, horizontal profiling, voids and sinkholes, faults and horizontal fracture zones. It is particularly useful where high detail is necessary or in complex geological environments.

MASW (Multichannel Analysis of Surface Waves)

ApplicationApparatusProcessed Results
- Measures the surface shear wave velocities that travel through the ground. The processed data can be used to estimate the thickness of overburden and bedrock and evaluate ground stiffness. The test can be conducted for onshore and offshore investigations.

Crosshole Seismic

ApplicationApparatusProcessed Results
- Establishes the seismic velocity profile of the ground which can be used to estimate the dynamic properties of soil and rock.

P-S Logging

The PS Logger probe measures P (compression) and S (shear) wave velocities in a single borehole without the need for external energy sources

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Processed Results


Geo-Resistivity Test

ApplicationApparatusProcessed Results
- Involves electrical measurements carried out on the ground surface to determine the depth and thickness of the underlying resistivity layers.
- Used to characterize possible lithologies and materials on site.

Falling Weight Deflectometer

applies a load to the pavement inducing a deflection bowl similar to the one of a passing truck.

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Manufacturer:  GRONTMIJ, Denmark

Cone Penetration Test



The cone penetration or cone penetrometer test (CPT) is a method used to determine the geotechnical engineering properties of soils and delineating soil stratigraphy.

Determining the resistance of a friction cone or a piezocone as it is advanced into subsurface soils at a steady rate.

Determining the pore water pressure developed during the penetration when using a properly saturated piezocone.
   Pore water pressure dissipation, after a push, can also be monitored for correlation to the time rate of consolidation and permeability.


A Pressuremeter test is an in-situ stress controlled loading test

performed on the wall of a borehole using a cylindrical probe which

can expand radially.

From the test readings (volume variation based on controlled

pressure), a stress-strain curve can be obtained, in the case of plane

deformation, which yields :

• the creep pressure Pf

• the Menard limit pressure PL




Locating method that uses radio waves capture images below the surfaces of the ground in a minimally invasive way

Menard Pressuremeter


Manufacturer: Germany

A PRESSURE-METER TEST is an In-Situ Stress Controlled Loading Test Performed on the wall of a borehole using cylindrical probe which can expand radially

From the test readings a Stress-Strain can be obtained which yields

- The Menard Pressure meter Modules
- The Creep Pressure
- The Menard Limit Pressure
- The Volume and Pressure Calibration

Has been performed on each test.




High Resolution Acoustic Televiewer (HRAT)

The High Resolution Acoustic Televiewer (HRAT)® provides a continuous high-resolution oriented ultrasound image of the borehole wall.

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