TERRA
COMPACTA

Geophysical research

A wide range of geophysical methods for research on land and under the sea.

Methods

1. SEISMIC METHODS (ON LAND AND UNDER SEA)

Shallow seismic reflection

APPLICATION: geotechnical investigation works for the design of tunnels with an upper layer of more than 50 meters, water investigation works, investigations of thermal waters.

RESULTS: 2D depth section with interpreted phenomena such as fault-fissure zones, bedrock wear zone, layer boundaries, caves, caverns.

Seismic refraction

Seismic refraction of longitudinal and transverse waves
APPLICATION: Determination of the depth to the bedrock and assessment of the state of the rock mass during geotechnical investigations, water investigation works in karst.

RESULTS: 2D depth models of P and S-wave velocity changes calculated by the delta-t-v-method and WET tomography, 2D MODELS of dynamic modules (Poisson, shear, elasticity).

Multi-channel Analysis of Surface Waves (MASW)

APPLICATION: Geotechnical investigation works, soil categorization according to Eurocode-8.

RESULTS: 1D and 2D depth models of S-wave velocity changes, average velocity in the FIRST 30 meters of depth, VS-30

Refraction microtremor (ReMi)

APPLICATION: Geotechnical investigation works, soil categorization according to Eurocode-8 (suitable for investigations in urban environments with high noise levels).

RESULTS: 1D depth models of S-wave velocity changes, average velocity in 30 meters depth, VS-30

Measurement of velocity in wells (Downhole, Crosshole)

APPLICATION: Geotehnical investigation works.

RESULTS: 1D models of P and S-wave velocity change in and between wells; dynamic modules (Poisson, Shear, Elasticity).

Measurement of microtremore

APPLICATION: Seismological research for the needs of seismological studies.

REZULTATI: HVSR spectres (Nakamura method).

2. METHODS OF MEASURING THE ELECTRICAL RESISTANCE OF THE SOIL (ON LAND AND UNDER THE SEA)

Geoelectric tomography (2D, 3D, 4D – TIME LAPSE)

APPLICATION: Water investigation works (locating water wells), geotechnical investigation works (rehabilitation of landslides, rehabilitation of waste landfill, detection of cavities, caverns, fault-fracture zones); environmental protection (pollution monitoring).

RESULTS: 2D and 3D depth models of changes in the electrical resistance of soil and rock mass; TIME-LAPSE 4D.

Deep 2D geoelectric tomography (up to 400 m depth)

APPLICATION: thermal water research, water research works.

RESULTS: 2D depth models of changes in electrical resistance of soil and rock mass.

Geoelectrical sounding

APPLICATION: thermal water research, water research works.

RESULTS: 1D depth models of changes in electrical resistance of soil and rock mass.

3. GROUND PENETRATING RADAR (GEORADAR)

APPLICATION: Geotechnical investigation works, detection of underground installations, archeology.

RESULTS: 2D and 3D depth sections.

4. MAGNETOMETRIC MEASUREMENTS

APPLICATION: Archeology.

RESULTS: 2D and 3D depth sections.

5. MEASUREMENT OF PILE INTEGRITY (PIT-PILE INTEGRITY TEST)

APPLICATION: Quality control of executed piles.

RESULTS: Speed/time graph.

Collaboration

We collaborate with institutions and companies in the field of geosciences in Croatia and abroad. Some of the partners are:

  • Hrvatski geološki institut
  • Geofizički zavod PMF-a
  • Seizmološka služba RH
  • RGN fakultet
  • Građevinski fakultet u Zagrebu
  • Građevinski fakultet u Splitu
  • JANAF
  • Geotehnički Studio d.o.o.
  • Hidroinženjering d.o.o.
  • Geokon – Zagreb d.d.
  • Krešo Geo d.o.o.
  • Profelis d.o.o.
  • Contera d.o.o.
  • Grad-geo-ing d.o.o.
  • Geoarheo d.o.o.
  • Geosond d.o.o.
  • Geotech d.o.o.
  • PanGeo d.o.o.
  • Radionica statike d.o.o.
  • SLP d.o.o. Ljubljana
  • Blohm Consulting Denver
  • PASI srl Torino
  • IBIS-inženjering d.o.o. Banja Luka
  • Interprojekt d.o.o. Mostar
  • Winner Project d.o.o. Sarajevo
  • Terracore Malta

...and many others

TERRA COMPACTA d.o.o.

Psunjska 3, 10000 Zagreb

OIB 10303379215 | MBS 080863386

Bank: Zagrebačka Banka d.d.
Zagreb, Trg Bana Josipa Jelačića 10
IBAN: HR6123600001102368964

phone/fax:+ 385 98 452 986

Base capital: 262.000,00 kn