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Cone Penetration Test (CPT)

Cone Penetration Test (CPT) is an in-situ test done to determine the soil properties and to get the soil stratigraphy. This test was initially developed by the Dutch Laboratory for Soil Mechanics in 1955 and hence it is sometimes known as the Dutch cone test. The A.P. van den...

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Cone Penetration Test (CPT)

The A.P. van den Berg CPT Truck is a vehicle suitable for soil investigations in pushing capacities from 140 to 200 kN or even more.A.P. van den Berg has more than 40 years’ experience in manufacturing CPT Trucks. The all-wheel drive 6x6 model has proven most popular among customers. The frame of the truck is reinforced with a sub frame to take the forces occurring during the Cone Penetration Tests. The truck’s total weight is sufficient to provide the maximum pushing force.The well-proven twin cylinder HYSON 200 kN penetrometer is installed in the CPT Truck. The hydraulic upper clamp is an efficient addition to the functionality of the HYSON 200 kN. The penetrometer is operated via the touch screen (HMI).

Dynamic Cone Penetration Test

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Dynamic Cone Penetration Test

Dynamic test is conducted by driving the cone by hammer blows. The dynamic cone resistance is estimated by measuring the number of blows required for driving the cone through a specified distance. Usually this test is performed with a 50 mm cone without bentonite slurry or using a 65 mm cone with bentonite slurry. The hammer weighs 65 kg and the height of fall is 75 cm. The test is done in a cased borehole to eliminate the skin friction. There are many correlations available to evaluate soil properties based on the CPT value (either static or dynamic).

PANDA® is a lightweight variable energy dynamic cone penetrometer for soil investigation or compaction control.Panda® software enables automatic calculation of anomalies for all materials while providing an immediate reading on site.Panda® makes it possible to survey sites that are inaccessible by road. It offers multi-level and multi-unit readings in real time. It is compatible with our geotechnical tools.

Characteristics:

Case dimensions : L 55 x l 43 x H 21 cm

Overall weight with case : 18,5 kg

2 cm² fixed cones and 4 cm² lost cones

Colour touchscreen

Dilatometer Test

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Dilatometer Test

Dilatometer consists of a stainless-steel blade with a thin flat circular expandable steel membrane on one side. Dilatometer is advanced into a borehole from the ground surface and tests are conducted at an interval of 10 to 20 cm. At each interval, the dilatometer is stopped and the membrane is inflated under gas pressure. The readings of inflation of the membrane and the corresponding gas pressure are recorded. There are correlations available to relate the test results with low-strain soil stiffness and liquefaction resistance of the soil.The equipment is original Marchetti Seismic Dilatometer set with no construction modification and shall include:

• Seismic probe: containing two receivers for the shear wave at the vertical distance of 0.5 m and, optionally a receiver for the compression wave. The electronic board inside the probe is able to amplify and digitize the electrical signals of the receivers according to the D 7400-08 ASTM standard specifications.

• Seismic acquisition control unit, connected to the seismic probe with the same cable of the traditional DMT test and to a laptop computer with a standard USB cable.

• SDMT Elab software for data acquisition and data processing. The wave source, generally a hammer hitting a beam, may be constructed directly by the user according to specifications provided by the manufacturer.

24-Channel Seismograph - 24 Bit PASI MOD. GEA 24

GEA24 is a compact-sized 24-channel seismograph (2 units can be serialized for a total of 48 chs) with a 24 bit acquisition board and USB interface for external PC .Suitable for so many applications, GEA-24 is a really affordable solution for all professional uses...

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24-Channel Seismograph - 24 Bit PASI MOD. GEA 24

Applications:

· REFRACTION

· SHALLOW REFLECTION

· SURFACE WAVES (MASW, Re.Mi., Vs30, MAAM, ESAC, etc.)

· HVSR / VIBRATIONS

· DOWNHOLE (with borehole 3Dgeophones Mod.GFA or DHTG)

· CROSSHOLE applications (with borehole 3D geophones Mod.GFA or DHTG + P/S wave borehole seismic source Mod.CHE)

Technical Specifications:

Number of channels: 24 channels+trigger (chan. AUX) - 2 units can be serialised for a total of 48 channels

Data Conversion : True 24 bit analogue/Digital Sigma-Delta converter (compatible with analogue geophones at any resonance frequency)

Stacking: Unlimited number of stacking

Input impedance: 2MOhm // 22nF

Dynamic range: 144dB (system); >117dB (instant, measured @1ksps)

Distortion: 0.007% @16kHz

Trigger: Normally closed contact, normally open (i.e. for use with explosives), analogue signal (starter geophone, piezoelectric starter), TTL trigger. Trigger sensitivity adjustable via software


Cone Penetration Test (CPT)
Dynamic Cone Penetration Test
Dilatometer Test
24-Channel Seismograph - 24 Bit PASI MOD. GEA 24

Resonant Column Test

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Resonant Column Test

This is a most common low strain test which is being used to evaluate the dynamic properties of soil. In this test the soil samples in the form of either solid or hollow cylindrical samples are subjected to torsion or axial loading using an electromagnetic loading system. The fundamental frequency of the sample can be evaluated and this, in turn, will give the value of the shear modulus of the soil specimen. Even though the resonant column test is a very good alternative in evaluating the damping and strain dependent properties of soils, the response will depend on the response of the apparatus also.

The Wille Geotechnik® resonant column is a high-quality apparatus that can determine the geotechnical properties of materials, such as soils for example, under a low strain range for solid- or hollow-cylindrical samples. The resonant column device, with a high-frequency electromagnetic torsional drive, can be used to vibrate top soil specimens at frequencies up to 2000 Hz in first-mode resonance while the bottom is fixed, or in second mode, while the top and bottom are free.

Diameter of solid and hollow samples 38 / 50 / 70 / 100 and 150 mm

Cell pressure 1000 kPa (higher available)

Torsional frequency Up to 2000 Hz

Applied pore pressure Up to 1000 kPa

*Customized on request

Bender Element Test

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Bender Element Test

In this test, the shear wave velocity of a laboratory specimen can be measured using a piezoelectric bender element. A transmitter and the receiver elements (piezoelectric transducers) are placed at each end of the sample. There will be change in the dimension of these piezoelectric elements when subjected to change in voltage. An electric pulse applied to the transmitter causes it to deform rapidly and produces a stress wave that will travel through the specimen towards the receiver. When the stress wave reaches the receiver, it generates a voltage pulse which is measured. The wave speed is calculated from the arrival time and the known distance between the transmitter and the receiver.

Exchangeable Bender-Element-Set for any specimen, designed for usage in triaxial cells, consolidation cells simple-shear or standard shear devices

The set consists of pairs of piezo-ceramic elements, connected into a special exchangeable adapter solution (without specimen adapter), which are implemented in top and bottom plates of the specimen adapter (e.g., of triaxial cells)
Available for horizontal testing
Easy fitting in the cell
The elements are available for S- and P-waves
The elements allow maximum flexure at its tip, whilst only protruding into the sample by a reasonable maximum
The elements are embedded in porous plate or without. This fitting allows pore water flow
High pressure electrical feed through for the bender element system at the top and bottom plate.

Cyclic Triaxial Tests

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Cyclic Triaxial Tests

The test device consists of the standard triaxial testing equipment with a cyclic axial loading unit. In some cases, the cell pressure is also applied cyclically and it is possible to simulate isotropic or anisotropic initial stress conditions. The values of the shear modulus and damping ratio can be obtained from the stress strain response of the samples. The average slope of the hysteresis loop yields shears modulus and the area under the loop provides the damping ratio. Typically, five to ten specimens are tested under different levels of cyclic shear strain amplitudes chosen in the range of 10-4 to 10-1 for the determination of dynamic properties. Dynamic deformation characteristics are influenced by the effective confining pressure during the test. When an undisturbed sample of normally consolidated soil is obtained, the effective vertical pressure at the depth of sampling is isotopically applied by cell pressure to avoid the influence of over consolidation. In order to obtain in-situ shear modulus of the soil from the laboratory test results, correction of these results is necessary so that a shear modulus corresponding to the average effective principal stress at the sample depth is obtained.

The series of triaxial testing systems is using servo pneumatic loading system for automatic static and cyclic requested loading for different applications.These high-quality stress/path triaxial testing systems are consisting basically of a rigid 2 column-load frame, a cyclic actuator, a multi-channel control system for dynamic axis load and actuators for cell-pressure, back-pressure and optional pore air pressure.

It’s included of all required components to perform fully automatic saturation, consolidation and static and cyclic triaxial tests. The software is able to produce all types of wave shapes like as sine, square, haversine or different customized wave shapes.

6-DOF Seismic Simulation System-Shake Table

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6-DOF Seismic Simulation System-Shake Table

It is used for various civil engineering applications including fundamental research for seismic isolation of buildings and bridges, seismic qualification of components, piping systems and nuclear power facilities. The seismic test systems are used worldwide and include many different types of earthquakes shaking table configurations with specimen capacities ranging from small test articles to full scale buildings. Typical table configurations include one, two, three, and six degrees of freedom motion.

Table size: - 4.1 * 4.1 meters
Full payload: - 30 tons
Nominal payload: - 20 tons
Frequency of operation: - 0.1~60 Hz
Overturning Moment: -1200 kN-meters for lateral (or longitudinal direction)
Centre of gravity on the table: 2.5 meters


Resonant Column Test
Bender Element Test
Cyclic Triaxial Tests
6-DOF Seismic Simulation System-Shake Table

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Seismic Cone Penetrometer
Static Cone Penetrometer
Standard Cone Penetration Test
Dynamic Cone Penetrometer
Field Vane Shear Test Apparatus
Dilatometer
Pressure-meter
Borehole Loggers
Seismographs
Block Vibration Test Apparatus
Seismic Cross-Hole Test Apparatus
Bender Element
Centrifuge Modelling
Cyclic Ring Shear
Resonant Column Test Apparatus
Hollow Cylinder Apparatus
Cyclic Triaxial Testing System
Large Scale Consolidation Cells

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Dynamic and Static Simple Shear Devices
Large Direct Shear System
Frozen Soils Testing Systems
Multi Channel Resistivity System
Strong Motion Recorders/Sensors
Seismometers
Borehole Seismometers
Broadband Seismometers
Triaxial Rotational Seismometers
Seismic Data Loggers
Multi-depth Electromagnetic Conductivity Meters
Magnetic Susceptibility Meters
Accelerated Weight Drop
Hydro-fracturing
MASW
SASW
Cross-Hole Shear Wave System
Step Frequency GPR with Borehole Antennas