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Novel Large-Scale Three-Dimensional Fracturing Experimental Apparatus and Application to Vertical-Well Hydraulic Fracturing of Hard Roof

期刊: GEOTECHNICAL TESTING JOURNAL, 2021; 44 (5)

Effective control of high-position hard roofs (HHRs) is important to meet the requirements of safe and efficient mining. Vertical-well hydraulic fract......

A New Suction-Controlled True Triaxial Apparatus for Unsaturated Soil Testing

期刊: GEOTECHNICAL TESTING JOURNAL, 2021; 44 (4)

A new suction-controlled true triaxial apparatus was developed to investigate unsaturated soil behavior under multiaxial stress paths that are not rea......

Application of Fiber Bragg Grating Sensing in Bidirectional Tests of Pile Foundations

期刊: GEOTECHNICAL TESTING JOURNAL, 2021; 44 (4)

The fiber Bragg grating (FBG) technique has emerged as a new strain monitoring technique in civil engineering applications. In this paper, based on th......

Developing a Sample Preparation Approach to Study the Mechanical Behavior of Unsaturated Fine/Coarse Soil Mixture

期刊: GEOTECHNICAL TESTING JOURNAL, 2021; 44 (4)

An interlayer soil was identified in the conventional French railway substructure, corresponding to a mixture of fine soils and coarse grains. As the ......

Effects of Camera Lens Distortion on Particle Size and Shape Characterizations

期刊: GEOTECHNICAL TESTING JOURNAL, 2021; 44 (4)

The image-based methods have been widely used for particle size and shape characterizations. However, images captured by various cameras may contain a......

Development and Application of a New Triaxial Testing System for Subzero Rocks

期刊: GEOTECHNICAL TESTING JOURNAL, 2021; 44 (5)

To face the challenges of coal production today, the mechanical behaviors of rock in subzero and disturbed environments are critical in the geomechani......

Model Test on the Soil Arching Effect of Pile-Supported Embankments Using Transparent Soil

期刊: GEOTECHNICAL TESTING JOURNAL, 2021; 44 (3)

Pile-supported embankments have been widely used in subgrade engineering for highways and high-speed railways. Soil arching has an important effect on......

Experimental Study on the Influence of Fast Cooling on the Mechanical Properties of Heated Granite

期刊: GEOTECHNICAL TESTING JOURNAL, 2021; 44 (5)

Fast-cooling treatments are performed on heated granite specimens to induce thermal shock (TS), whereby the effect of TS on the physical and mechanica......

Measurement Performance Evaluation of Tactile Pressure Sensor with Different Particle Sizes and Sensor Curvatures

期刊: GEOTECHNICAL TESTING JOURNAL, 2021; 44 (4)

In small-scale geotechnical experiments, using a tactile pressure sensor (TPS) to measure soil pressure distribution on a curved surface can effective......

Estimation of Undrained Shear Strength of Overconsolidated Clay Using a Maximum Excess Pore Pressure Method Based on Piezocone Penetration Test (CPTU)

期刊: GEOTECHNICAL TESTING JOURNAL, 2021; 44 (4)

Many methods can be used to evaluate the undrained shear strength (s(u)) in unconsolidated or normally consolidated clay. However, among the many meth......

Classification and Recognition Model of Water Saturation Level of Rock Based on Near-Infrared Spectroscopy

期刊: GEOTECHNICAL TESTING JOURNAL, 2021; 44 (3)

In geotechnical engineering, the water saturation of rock cannot be obtained in real time and is lossless. To solve this problem, a continuous classif......

Long-Term Cyclic Loading Tests for Offshore Pile Foundations Based on Hydraulic Gradient Modeling

期刊: GEOTECHNICAL TESTING JOURNAL, 2021; 44 (3)

Long-term dynamic response of pile foundations for offshore engineering has attracted more and more attention. The deflection accumulation and the nat......

A Ring-Shear Radial-Seepage Apparatus for Evaluating the Permeability of Shear Bands in Compacted Clay

期刊: GEOTECHNICAL TESTING JOURNAL, 2021; 44 (4)

Compacted clay cores are extensively used in rockfill dams to cut off water flow because of their low permeability and wide availability. Large differ......

Evaluation of Soil Coefficients for Two-Parameter Subgrade Soil Model Based on Rigid Plate Loading Tests

期刊: GEOTECHNICAL TESTING JOURNAL, 2021; 44 (3)

Two-parameter elastic foundation models have great potential for approximate soil-foundationstructure interaction analysis. A hurdle to the wide appli......

Fiber Bragg Grating-Based Flume Test to Study the Initiation of Landslide-Debris Flows Induced by Concentrated Runoff

期刊: GEOTECHNICAL TESTING JOURNAL, 2021; 44 (4)

In order to explore the initiation of landslide-debris flow caused by concentrated runoff, a flume test has been performed on soil samples taken from ......

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