RNDr. Libor Potančok
Division Manager IG
Department Manager
0905 228 496
libor.potancok@geoslovakia.sk

Ing. Monika Drozdová
Skilled Geologist
0905 472931
drozdova@geoslovakia.sk

Field Test Department

Based on the Certificate issued by the Slovak Testing Laboratories Association, our company is entitled to use a seal of the registered Testing Laboratory!

Within engineering geological exploration, and specially in the phase of supplementary exploration, there are most of field tests realized here and focused on the checking and control of foundation base quality, earthgrade bottom layer, embankments of constructions and traffic works, checking the quality and compaction of engineered fills, sealing of waste dumps, checking the quality and properties of soils after their stabilization.

1. Static and dynamic penetration probes - Dynamic and static penetration probes enable to assess quickly and non-destructively the construction sublayer - to ascertain an interface and thickness of the individual layers, to determine some strength and deformation characteristics, to ascertain a depth of bearing bottom layer, caverns and etc.

Instrumentation: 

  • Static penetration test equipment GEOTOOL (Germany)
  • Dynamic penetration test equipment BORROS (Sweden)

2. Static and dynamic loading plate tests - Loading plate tests enable to determine, in a non-destructive way, the strength of foundation soil, deformation modulus and modulus of rock elasticity, modulus of subgrade reaction, or to determine the density of soil ratio and compaction ratio of subgrade and materials of embankments, and stabilized soils. 

Instrumentation:

  • Static load test equipment Strassentest (Germany)
  • Static load test equipment ECM Static (Czech Republic)
  • Dynamic load test equipment HMP LFG - SD (Germany)

3. Determination of bulk density - For determination of compaction parameters, direct and indirect testing methods are used here. Direct methods include a determination of bulk density by sample drawing into the carving ring by means of the water membrane volume meter, by using the pit method and consequent determination of moisture content and calculation of D parameters (comparison with results of the laboratory Proctor - standard compaction test).

Instrumentation:

  • water membrane volume meter (England)
  • equipment for pit methods
  • sampler for intact samples (EIJKELKAMP Netherlands)

4. CBR test (California bearing ratio) - A value of California bearing ration served originally as a characteristics of material for materials used in road construction for the structural design. At the present time this test serves also for assessment of a bearing capacity of bottom layer of road communications. The CBR value (expressed in %) is a number representing a ratio of soil resistance against penetration of a steel punch to the resistance against penetration of this punch into the standard material (macadam) under the same conditions. Based on the correlation relations it is possible to derive also the modulus of elasticity from this test.

Instrumentation:

  • CBR equipment (ELE England)

5. Inclinometer measurement - inclinometer measurement is performed using the inclinometer device. This device consists of inlinometric casings having a pair of vertical guide grooves inclinometric probe, control cable and the recording unit.
inclinometric casing is installed in a vertical borehole that passes through the zone forecast movement. Bottom Casing is anchored in stable soil and casing in the borehole are cement-bentonite stabilized vinaigrette.
inclinometric probe is used to measure the Casing and establish their initial positions. The movement of soil causes a shift from their casings initial position.
Size, depth and degree of this shift is calculated by comparing the data in the initial position of the data found in other measurements.

Instrumentation:

  • Inclinometer Probe device Digitilt USA

Fotogaléria