G2MP-GC Plateau

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Laboratory for applied mechanical and electrical engineering sciences (SIAME)
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Geomechanical , Porous Media and Civil Engineering Plateau(G2MP -GC)

This plateau is part of the UPPA Instrumental Service Centre: UPPATECH.

It is supported by two laboratories of the University LFCR and SIAME and is headed by David Grégoire and Domenico Gallipoli.

Keywords: transport: permeability, adsorption, porous media, rupture, mechanical, thermal, thermo-hygro-mechanical couplings, geo-materials, concrete, rocks, soils.

Descriptions of the Geomechanical test benches

Manufacturing, machining:

Allows the production of samples from raw materials, this part includes mixers for concrete and mortars, a milling machine, a high-capacity saw, a precision saw and a core drilling machine.

Studies of fluid transport properties and their behaviour in confined environments

Axial and radial permeability: measurements of permeability, intrinsic and apparent, possibly under confinement or mechanical loading.

Optical techniques for the determination of transport and thermodiffusion properties.

Manometric and gravimetric techniques for the measurement of adsorbed quantities and adsorption isotherm under reservoir conditions, possibly combined with calorimetry to measure adsorption heat.

Characterizations of porous media

Porosimetry by measurement of adsorption isotherms, porosimetry by mercury intrusion.

Hydromechanical coupling in soils

A triaxial cell for saturated soils and two for unsaturated soils allow to measure the mechanical characteristics of soils under different saturation and confinement conditions.

Thermal characterization 

Hot Disc" type measuring system allowing the determination by reverse analysis of thermal characteristics. These can be carried out under various climatic conditions (temperature and relative humidity).

Mechanical measurements and characterizations:
Capacity controlled presses (20, 250, 300, 2000 and 3000kN) are used to measure the mechanical characteristics of materials (elastic and fracture). The platform also has measurement equipment using sensors, gauges, optical methods and acoustic analysis. The tests can be performed under different conditions of temperature and relative humidity.

Descriptions of the Coastal Engineering test benches

The objective of this technical platform is to carry out essentially in-situ measurements of hydrodynamic conditions and transport and impacts associated with storm waves. These resources include:

a datawell directional houlograph located 3 miles off Biarritz in 50m of water and allowing to measure in real time the elevation of the free surface by accelerometry. This system then makes it possible to obtain, in addition to the raw elevation data, the integrated statistical and spectral data of the directional wave. It is operated jointly by UPPA and CEREMA.

resistive poles of different types to measure at high frequencies the variations of the water/sediment and water/air interfaces. Design for which a joint Imartec/UPPA patent has been granted.

a permanently installed impact pressure measuring system on the Artha dike. The installation includes: Keller PA25 high frequency (5kHz) piezoresistive pressure transmitters, National Instrument CRIO-9076 acquisition station, battery and solar panel power supply and data transmission and reception module.

Video systems based on the SIRENA system including cameras, image processing, data transfer and storage. These systems make it possible to trace the position of the underwater bars back to the position of the bars from the colour variations due to the breaking gradient observed in time-integrated images (http://sirena.univ-pau.fr).

Acoustic current meters ADV, ADCP which allow to measure the speed of the current locally or at different points in the water column by Doppler effect.

A set of autonomous pressure sensors of type RBRsolo D allowing to record locally the variations of the free surface.

A set of wire pressure sensors to record locally variations in free surface or pore pressure in soils.

Means for installing sensors on the beach, including a pump to liquefy the ground to sink the sensor supports deep (several metres) into it.

IT resources for launching acquisitions

 

In a nutshell

Staff: 1 IA partially funded by ISA-BTP(50%)/SIAME(25%)/LFC-R(25%)

Annual maintenance cost: about 5000€

Associated partnership relations (at present): PIA MACENA, ANR Andra BEFIS,

contracts: EDF, ANDRA, Total, CNES, INEF4, CSTB 

Part of the set is shared for educational activities.