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  2. Cone penetration test - Wikipedia

    en.wikipedia.org/wiki/Cone_penetration_test

    The original cone penetrometers involved simple mechanical measurements of the total penetration resistance to pushing a tool with a conical tip into the soil. Different methods were employed to separate the total measured resistance into components generated by the conical tip (the "tip friction") and friction generated by the rod string.

  3. Standard penetration test - Wikipedia

    en.wikipedia.org/wiki/Standard_penetration_test

    The standard penetration test (SPT) is an in-situ dynamic penetration test designed to provide information on the geotechnical engineering properties of soil. This test is the most frequently used subsurface exploration drilling test performed worldwide. The test procedure is described in ISO 22476-3, ASTM D1586 [1] and Australian Standards AS ...

  4. Geotechnical investigation - Wikipedia

    en.wikipedia.org/wiki/Geotechnical_investigation

    A USBR soil scientist advances a Giddings Probe direct push soil sampler.. Geotechnical investigations are performed by geotechnical engineers or engineering geologists to obtain information on the physical properties of soil earthworks and foundations for proposed structures and for repair of distress to earthworks and structures caused by subsurface conditions; this type of investigation is ...

  5. Penetrometer - Wikipedia

    en.wikipedia.org/wiki/Penetrometer

    The measurements find whether the soil is strong enough to build a road on. Scientists also use a penetrometer to measure how much moisture is in soil. Penetrometers are used by space probes such as the Cassini–Huygens probe, to measure the amount of moisture in soil on other planets.

  6. Touch probe - Wikipedia

    en.wikipedia.org/wiki/Touch_probe

    After the machine knows everything's location, offsets are adjusted to start the next operation after the probe has been removed from the tool holder. [2] [4] The technology reduces manual measurement errors and also improves machining accuracy, speeds up the setup process, and enables more sophisticated and precise manufacturing capabilities ...

  7. Digital soil mapping - Wikipedia

    en.wikipedia.org/wiki/Digital_soil_mapping

    Digital soil mapping (DSM) in soil science, also referred to as predictive soil mapping [1] or pedometric mapping, is the computer-assisted production of digital maps of soil types and soil properties. Soil mapping, in general, involves the creation and population of spatial soil information by the use of field and laboratory observational ...

  8. TDR moisture sensor - Wikipedia

    en.wikipedia.org/wiki/TDR_moisture_sensor

    A TDR waveguide with exposed wires. In the waveform analysis a sensor (usually a probe) is placed in the material to be tested. The sensor contains a waveguide consisting of two, three, or more parallel wires which is connected via a coaxial cable to a voltage pulse generator which sends precisely defined voltage pulses into the sensor.

  9. Tensiometer (soil science) - Wikipedia

    en.wikipedia.org/wiki/Tensiometer_(soil_science)

    Electronic tensiometer probe: (1) porous cup; (2) water-filled tube; (3) sensor-head; (4) pressure sensor. A tensiometer in soil science is a measuring instrument used to determine the matric water potential (soil moisture tension) in the vadose zone.

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