منابع مشابه
Effects of Particle Shape and Microstructure on Strength and Dilatancy During a Numerical Direct Shear Test
ABSTRACT: Discrete element method offers insights into the soil behaviour at the microscopic level. In this investigation, a series of numerical direct shear tests is carried out by a three-dimensional discrete element code PFC. The size of the shear box is 6 cm long, 3 cm wide and 4 cm high. Non-spherical shaped particles are created by joining primary constitutive spherical balls together wit...
متن کاملShear-induced dilatancy of fluid-saturated faults: Experiment and theory
[1] Pore fluid pressure plays an important role in the frictional strength and stability of tectonic faults. We report on laboratory measurements of porosity changes associated with transient increases in shear velocity during frictional sliding within simulated finegrained quartz fault gouge (d50 = 127 mm). Experiments were conducted in a novel true triaxial pressure vessel using the double-di...
متن کاملDeformation and Shear Strength Characteristics of Some Tropical Peat and Organic Soils
Peat and organic soils commonly occur as extremely soft, unconsolidated surficial deposits that are an integral part of the wetland systems. They may also occur as strata beneath other surficial deposits. These soils are problematic as they are very highly compressible and are of very low shear strength. In countries like Malaysia, peat and organic soils are found in abundance. Utilization of t...
متن کاملShear modulus and dilatancy softening in granular packings above jamming.
We investigate experimentally the mechanical response to shear of a monolayer of bidisperse frictional grains across the jamming transition. We inflate an intruder inside the packing and use photoelasticity and tracking techniques to measure the induced shear strain and stresses at the grain scale. We quantify experimentally the constitutive relations for strain amplitudes as low as 10(-3) and ...
متن کاملField tests for operational shear strength assessment in peat at Uitdam, The Netherlands
Stability assessment of existing dikes build on soft soil generates questions on the available stability calculation techniques and material models. Especially peat behaviour is not easily captured by standard design methods. This has led to disapproval, based on calculations, of dikes that have been in operation for several hundreds of years. To establish the weak points in the stability asses...
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ژورنال
عنوان ژورنال: Soils and Foundations
سال: 1982
ISSN: 0038-0806
DOI: 10.3208/sandf1972.22.2_133