An oedometer test is a kind of geotechnical investigation performed in geotechnical engineering that measures a soil's consolidation properties. Oedometer tests are performed by applying different loads to a soil sample and measuring the deformation response. The results from these tests are used to predict how a soil in the field will deform in response to a change in effective stress.
Oedometer tests are designed to simulate the one-dimensional deformation and drainage conditions that soils experience in the field. The soil sample in an oedometer test is typically a circular disc of diameter-to-height ratio of about 3:1. The sample is held in a rigid confining ring, which prevents lateral displacement of the soil sample, but allows the sample to swell or compress vertically in response to changes in applied load. Known vertical stresses are applied to the top and bottom faces of the sample, typically using free weights and a lever arm. The applied vertical stress is varied and the change of the thickness of the sample is measured.
For samples that are saturated with water, porous stones are placed on the top and bottom of the sample to allow drainage in the vertical direction, and the entire sample is submerged in water to prevent drying. Saturated soil samples exhibit the phenomenon of consolidation, whereby the soil's volume changes gradually to give a delayed response to the change in applied confining stresses. This typically takes minutes or hours to complete in an oedometer and the change of sample thickness with time is recorded, providing measurements of the coefficient of consolidation and the permeability of the soil.
An oedometertest is a kind of geotechnical investigation performed in geotechnical engineering that measures a soil's consolidation properties. Oedometer...
Triaxial shear test Direct shear test Relative density Oedometertest for consolidation California bearing ratio (CBR) Permeability tests (constant-head...
excavation in clay. Geotechnical engineers use oedometers to quantify the effects of consolidation. In an oedometertest, a series of known pressures are applied...
A sieve analysis (or gradation test) is a practice or procedure used in geology, civil engineering, and chemical engineering to assess the particle size...
Laboratory tests using soil samples subjected to hydraulic experiments Field tests (on site, in situ) that are differentiated into: small-scale field tests, using...
tests measure the "accessible void", the total amount of void space accessible from the surface (cf. closed-cell foam). There are many ways to test porosity...
soil test-based definition, usually performed via cyclic triaxial, cyclic direct simple shear, or cyclic torsional shear type apparatus. These tests are...
flow methods. The soil samples tested can be any type include remolded, undisturbed, and compacted samples. Oedometertest This can be used to determine...
are often determined using some combination of field tests (e.g., aquifer tests) and laboratory tests on aquifer material samples. Recently, these properties...
stability, and a narrow stem with graduations for measuring. The liquid to test is poured into a tall container, often a graduated cylinder, and the hydrometer...
or be induced by human activities, such as mining, fracking, and nuclear tests. The initial point of rupture is called the hypocenter or focus, while the...
monitoring wells or piezometers. Samples collected from boreholes are often tested in a laboratory to determine their physical properties, or to assess levels...
introducing the set of basic equations of Poroelasticity. Soils are tested with an oedometertest to determine their compression index and coefficient of consolidation...
"IMPORTANCE OF FREE ENDS IN TRIAXIAL TESTING" Journal of Soil Mechanics & Foundations, Volume: 90 "New Oedometer and New Triaxial Apparatus for Firm Soil"...
also commonly used. From the Annual Book of ASTM (American Society for Testing and Materials) Standards, the total evaporable moisture content in Aggregate...
easily identified using X-ray diffraction rather than chemical or physical tests. Varve (or varved clay) is clay with visible annual layers that are formed...
631. ISBN 0136427103. "ISO 14688-1:2002 – Geotechnical investigation and testing – Identification and classification of soil – Part 1: Identification and...
the vadose zone to be deposited in pore space. ASTM American Standard of Testing Materials: 200 sieve – 0.005 mm. USDA United States Department of Agriculture...
controls failure and runout of loose granular deposits: Evidence from flume tests and implications for post-seismic slope healing". Geophysical Research Letters...
construction of a new test well, it is considered best practice to invest in a complete battery of chemical and biological tests on the well water in question...
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