Results 141 to 150 of about 517 (169)

A simple model to estimate change in precompression stress as a function of water content on the basis of precompression stress at field capacity

Geoderma, 2012
Abstract Precompression stress is an important criterion in soil mechanics and is often determined at a water content equivalent to a matric potential of − 6 kPa. In German-speaking countries, this matric potential corresponds to field capacity. Yet in order to assess the risk of compaction in arable soils, it needs to be known for a wide range of ...
Jan Rucknagel, Olaf Christen
exaly   +3 more sources

Functional evaluation of the various calculation methods for precompression stress

Soil Use and Management, 2019
Abstract Precompression stress ( σ p ) is commonly used as an indicator for the load carrying capacity of a soil and its stress history. Several calculation methods have been proposed to determine
Jan De Pue, Gemmina Di Emidio, Adam Bezuijen, Wim M. Cornelis   +3 more
openaire   +2 more sources

Determination of precompression stress from uniaxial compression tests

Soil and Tillage Research, 2008
Abstract Soil compaction has been studied for many years due to its implications for crop yield. In addition, precompression stress is important tool in evaluating soil load capacity and its implications for soil structure. This study evaluated whether precompression stress fitted by different methods gave rise to different results when a wide range ...
Johan Arvidsson, Alvaro Pires da Silva, Thomas Keller   +2 more
exaly   +2 more sources

Assessing the coupling effects of nanosized fly ash and precompression stress towards mitigating subgrade cracks mobilised by traffic loading

Nanotechnology for Environmental Engineering, 2021
This study is focused on the application of nanotechnology and applied confined pressure to reduce subgrade cracking under traffic loading. At stage one, the expansive subgrade was treated with varying percentages of 0%, 5%, 15%, and 25% of nanosized fly ash (NFA), coupled with confined precompression stresses of 10 kPa and 20 kPa, 12 h after the ...
Mohamed M H Mostafa, Frank I Aneke
exaly   +2 more sources

Variance of mechanical precompression stress in graphic estimations using the Casagrande method and derived mathematical models

Soil and Tillage Research, 2010
Abstract Mechanical precompression stress is a yardstick for the strength and compressibility of soils. The default method for the estimation of precompression stress is the graphic method according to Casagrande. It involves a subjective perception by the engineer who not only determines the point of the highest curvature visually, but decides also ...
Jan Rucknagel, Olaf Christen
exaly   +2 more sources

Models for prediction of soil precompression stress from readily available soil properties

Geoderma, 2018
Abstract Compaction of the subsoil is an almost irreversible damage to the soil resource. Modern machinery exerts high mechanical stresses to the subsoil, and a range of studies report significant effects on soil functions. There is an urgent need for quantitative knowledge of soil strength in order to evaluate sustainability of current field traffic.
Schjønning, Per; id_orcid 0000-0002-9362-1003, Lamandé, Mathieu; id_orcid 0000-0003-4211-9395   +1 more
openaire   +2 more sources

Relationship of precompression stress with elasticity and plasticity indexes from uniaxial cyclic loading test

Soil and Tillage Research, 2018
Abstract The precompression stress (σ p ) has been considered as the soil load bearing capacity, because σ p theoretically separates predominantly elastic (loads lower than σ p ) from predominantly plastic (loads greater than σ p ) deformations.
Paulo Ivonir Gubiani, Patricia Pértile, José Miguel Reichert   +2 more
openaire   +2 more sources

Soil water diffusivity as function of the pore size distribution and precompression stress

Soil and Tillage Research, 2023
Steffen Beck-Broichsitter, Anneka Mordhorst, Heiner Fleige   +2 more
exaly   +2 more sources

Non-linear finite element analysis of cone penetration in layered sandy loam soil – Considering precompression stress state

Journal of Terramechanics, 2009
Abstract Axisymmetric finite element (FE) method was developed to simulate cone penetration process in layered granular soil. The FE was modeled using ABAQUS/Explicit, a commercially available package. Soil was considered as a non-linear elastic plastic material which was modeled using variable elastic parameters of Young’s Modulus and Poisson’s ...
null M.Z. Tekeste, null E.W. Tollner, null R.L. Raper, null T.R. Way, null C.E. Johnson   +4 more
openaire   +2 more sources

Stress–Strain Relationships: A Possibility to Quantify Soil Strength Defined as the Precompression Stress

, 2011
Rainer Horn, Stephan Peth
openaire   +2 more sources