geotechnical instrument Articles

  • Geotechnical examples

    This is a collection of various cases where the 2D resistivity imaging method pioneered by Advanced Geosciences Inc have been successfully applied. Click on a section below ...


    By Advanced Geosciences, Inc.

  • The Application of Time Domain Reflectometry in Geotechnical Instrumentation

    The performance of road pavements and earth structures is dependent on the moisture regime experienced during their service life. One of the practical challenges in understanding moisture regimes in earth structures has been to continuously monitor moisture fluctuations in a nondestructive and reasonably accurate way. The time domain reflectometry (TDR) device shows considerable promise in ...


    By ASTM International

  • The Use of Hall Effect Semiconductors in Geotechnical Instrumentation

    For the past five years or so Hall effect semiconductors have been increasingly used in the geotechnical engineering laboratories at the University of Surrey. They have been incorporated as sensing elements in local radial and axial strain measuring devices, for the small-strain instrumentation of triaxial specimens, and in small diameter boundary normal and shear stress cells. Triaxial internal ...


    By ASTM International

  • New Geotechnical Tiltmeter with MEMS Technology

    Introducing the 850 MEMS Tuff Tilt Series, the latest addition to Jewell Instruments’ electrolytic tiltmeter line for geophysical & geotechnical applications. This versatile, rugged, weatherproof tiltmeter is a low-cost alternative to most sensors ...


    By Eneco

  • Rainy Day Session Instruments

    Rainy Day Session Instruments Rain and melted snow in the United States winter can cause runoff.  Such winter runoff causes the movement of soil or at least cloudy turbid water. This had been known to occur on native undisturbed lands. However, with the growth of the population, we see more and more development ...


    By Geotechnical Services, Inc

  • Understanding Geographical Instrumentation

    Geographical instrumentation is one of the much heard terms especially in the field of building. Anywhere, where construction is carried out then services rendered for site examination plays an important role. It helps in identifying possible risks and also effectiveness present within the current site or structure.  Designing of the Site The basic step which is carried out ...


    By Soldata Limited

  • Centrifuge Modeling: A Study of Similarity

    Data are presented of geotechnical centrifuge models of reinforced soil retaining walls in which the effects on wall behavior of differences between prototype and model, boundary effects, stress paths, instrumentation, and model repeatability are ...


    By ASTM International

  • Resolving claims for microtunneling - a case history of the Arlington cemetery stormwater outfall tunnel

    This paper provide case history details of a microtunnel constructed at Arlington Cemetery to transfer stormwater associated with expansion of the Cemetery to the Boundary Channel, a tributary of the Potomac River. The project design, construction methodology, geotechnical instrumentation, problems encountered during construction, and the resolution of differing site conditions (DSC) without the ...

  • Geotomography in Site Investigation: Simulation Study

    Tomography is the reconstruction of images from measurements of line integrals. It is used in a variety of scientific and technical applications. Advances in electronics and computers make the technique accessible to geotechnical engineering. The combination of penetration testing and tomographic reconstruction would result in a powerful site investigation tool.A tomographic software was ...


    By ASTM International

  • Case Study - Panama Canal: Boat Towed 3D Resistivity Surveys

    77 km Long 3D Canal Floor Sediment/Rock Study for Dredging Estimates Boat towed streaming dipole-dipole resistivity data were successfully used to estimate geotechnical properties of the canal floor in order to reduce dredging costs for an ongoing Panama Canal expansion program. Site:  The 77-km long Panama Canal with 773 line-km of resistivity data collected at 25 m transect spacing ...


    By Advanced Geosciences, Inc.

  • Uniformity Tests in Calibration Chamber Samples by the Thermal Probe Method

    The calibration of geotechnical instruments for in-situ tests, performed on sand samples reconstituted in huge calibration chambers (CC), requires the reproduction of large specimens at given relative densities with good repeatability and satisfactory homogeneity. A test method has been developed with the purpose of evaluating the relative density, DR, in different locations of the CC samples ...


    By ASTM International

  • National Grid, Croydon case study

    Morgan Est Contractors for National Grid Supply and installation of telemetred groundwater monitoring network, May 2006 - ongoing Hydro-Logic recently completed the supply and installation of borehole instrumentation and a telemetry monitoring system to monitor groundwater conditions in 28 observation wells located at 19 sites in the vicinity of Croydon. The project was required to ...


    By Hydro-Logic Services

  • National Grid, Croydon case study

    National Grid, Croydon Morgan Est Contractors for National Grid Supply and installation of telemetred groundwater monitoring network, May 2006 - ongoing Hydro-Logic recently completed the supply and installation of borehole instrumentation and a telemetry monitoring system to monitor groundwater conditions in 28 observation wells ...


    By Hydro-Logic Services

  • Turbidity Warning System

    Morgan Est Contractors for National Grid Supply and installation of telemetred groundwater monitoring network, May 2006 ongoing Hydro-Logic recently completed the supply and installation of borehole instrumentation and a telemetry monitoring system to monitor groundwater conditions in 28 observation wells located at 19 sites in the vicinity of Croydon. The ...

  • Staying Safe with Environmental Monitoring

    Geotechnical Instrumentation involves administering the earth and environment and it is hence that designers have made different frameworks to make the occupation simpler. These frameworks grab thousands upon much information that it orders and illuminates so they can concoct evidence. The places where it is necessary are the pollution chance appraisal, trends in time and space; anticipatory ...


    By Soldata Limited

  • Sinkhole investigation case study

    Proposed Landfill Site - Sumter County, Florida A geophysical site characterization study was performed by GeoView to assist in the placement of a planned Class 2 Landfill in Florida. The survey area was approximately 160 acres. GeoView performed a ground penetrating radar (GPR) study map the lateral boundaries and determine apparent severity of karst (sinkhole) features. Electrical ...


    By GeoView, Inc.

  • Greenstars portable monitoring for CHP and flares

    Greenstar’s award-winning KTK landfill site in Kilcullen, Co. Kildare, is unusual in Ireland in that it has three gas engines feeding electricity to the grid and two flares. In Ireland, while flaring is common, engines are not. The flares are run in tandem with engines so that if an engine is ramped down for repair or service, the flare ramps up automatically. All are supplied by 122 ...


    By Geotech

  • Why perform 3D slope stability analysis

    Background The benefits associated with performing 3D slope stability analyses were expounded by Dr. Del Fredlund in the 1970s.  Over the years a number of 3D methods of analysis have been researched. These methods have ranged from the method of columns to approaches based on variational calculus, and more recently, the use of dynamic programming. The interest in 3D slope stability analysis ...


    By SoilVision Systems Ltd.

  • Should Your Sensor Have A Connector Or Pin Terminals?

    When it comes to measuring the activity of your project, it’s nice to have options. High precision sensors can offer plenty of selections from the range of your measurements to the output of your readings, but a sensor is only as good at its connection. Connectors and pin terminals are common and dependable connections that relay your readings from within the sensor to the screen in front ...


    By Jewell Instruments LLC

  • MASW and resistivity sounding case study

    Anclote Natural Gas Conversion Project, Pasco County, FL  Our client was coordinating the conversion of an oil-burning power plant to natural gas. As part of the associated geotechnical study, GeoView, Inc. was tasked with determining the S-wave velocity and vertical resistivity structure at the site. For the seismic portion of the study, MASW (Multi-channel Analysis of Surface ...


    By GeoView, Inc.

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