Details
| Translated title of the contribution | Evaluation of the soil consolidation state by using data from penetration resistance probes |
|---|---|
| Original language | German |
| Pages (from-to) | 303-308 |
| Number of pages | 6 |
| Journal | Journal of Plant Nutrition and Soil Science |
| Volume | 167 |
| Issue number | 3 |
| Publication status | Published - Jun 2004 |
Abstract
Penetration resistance data (EW) from handdriven equipment are easily obtainable because the equipment is simple, cheap, and easily carriable. Measurements are performed quickly without extensive destruction of the site. It is the only method to measure soil strength directly and in situ. Therefore, it is worthwhile to propose an interpretation of the results in order to obtain more conclusive statements on the structural soil state. The procedure applied in our study consists in assigning EW values to the principal stress σX and in using an auxiliary construction for the vertical component (σZ) as a function of penetration depth. The EW value obtained at the final soil depth is assumed to represent stresses at rest, i.e., K0 = σX/σZ = 1. Drawing a straight line from this point towards the origin of the coordinates EW and soil depth supplies values of the hydrostatic condition for each depth; e.g., values for σZ are available for each depth. The coefficient for the equivalent stress at rest (K0E per depth can now be calculated simply by comparing the measured EW values with the assumed (hydrostatic) vertical depth function of EW. From a total volume of 29 sets of EW versus depth relations, means and standard deviation of K0E are presented for arable and forest soils from central Europe. K0E of forest soils tends to be close to 1 showing approximately normal compaction. In arable sites, K0E > 2 prevail, indicating precompation. These results confirm the general feasibility of the approach to evaluate the compaction state of soil from EW data. Examples are given to show the K0E characteristics for special cases of mechanical stress situations.
ASJC Scopus subject areas
- Agricultural and Biological Sciences(all)
- Soil Science
- Agricultural and Biological Sciences(all)
- Plant Science
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In: Journal of Plant Nutrition and Soil Science, Vol. 167, No. 3, 06.2004, p. 303-308.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Ermittlung des spannungszustandes von böden aus werten des eindringwiderstandes von sonden
AU - Hartge, Karl Heinrich
AU - Bachmann, Jörg
N1 - Copyright: Copyright 2008 Elsevier B.V., All rights reserved.
PY - 2004/6
Y1 - 2004/6
N2 - Penetration resistance data (EW) from handdriven equipment are easily obtainable because the equipment is simple, cheap, and easily carriable. Measurements are performed quickly without extensive destruction of the site. It is the only method to measure soil strength directly and in situ. Therefore, it is worthwhile to propose an interpretation of the results in order to obtain more conclusive statements on the structural soil state. The procedure applied in our study consists in assigning EW values to the principal stress σX and in using an auxiliary construction for the vertical component (σZ) as a function of penetration depth. The EW value obtained at the final soil depth is assumed to represent stresses at rest, i.e., K0 = σX/σZ = 1. Drawing a straight line from this point towards the origin of the coordinates EW and soil depth supplies values of the hydrostatic condition for each depth; e.g., values for σZ are available for each depth. The coefficient for the equivalent stress at rest (K0E per depth can now be calculated simply by comparing the measured EW values with the assumed (hydrostatic) vertical depth function of EW. From a total volume of 29 sets of EW versus depth relations, means and standard deviation of K0E are presented for arable and forest soils from central Europe. K0E of forest soils tends to be close to 1 showing approximately normal compaction. In arable sites, K0E > 2 prevail, indicating precompation. These results confirm the general feasibility of the approach to evaluate the compaction state of soil from EW data. Examples are given to show the K0E characteristics for special cases of mechanical stress situations.
AB - Penetration resistance data (EW) from handdriven equipment are easily obtainable because the equipment is simple, cheap, and easily carriable. Measurements are performed quickly without extensive destruction of the site. It is the only method to measure soil strength directly and in situ. Therefore, it is worthwhile to propose an interpretation of the results in order to obtain more conclusive statements on the structural soil state. The procedure applied in our study consists in assigning EW values to the principal stress σX and in using an auxiliary construction for the vertical component (σZ) as a function of penetration depth. The EW value obtained at the final soil depth is assumed to represent stresses at rest, i.e., K0 = σX/σZ = 1. Drawing a straight line from this point towards the origin of the coordinates EW and soil depth supplies values of the hydrostatic condition for each depth; e.g., values for σZ are available for each depth. The coefficient for the equivalent stress at rest (K0E per depth can now be calculated simply by comparing the measured EW values with the assumed (hydrostatic) vertical depth function of EW. From a total volume of 29 sets of EW versus depth relations, means and standard deviation of K0E are presented for arable and forest soils from central Europe. K0E of forest soils tends to be close to 1 showing approximately normal compaction. In arable sites, K0E > 2 prevail, indicating precompation. These results confirm the general feasibility of the approach to evaluate the compaction state of soil from EW data. Examples are given to show the K0E characteristics for special cases of mechanical stress situations.
KW - Normal compaction
KW - Penetration resistance
KW - Penetrometer
KW - Precompaction
KW - Stress distribution
KW - Stresses at rest
UR - http://www.scopus.com/inward/record.url?scp=3042819786&partnerID=8YFLogxK
U2 - 10.1002/jpln.200321264
DO - 10.1002/jpln.200321264
M3 - Artikel
AN - SCOPUS:3042819786
VL - 167
SP - 303
EP - 308
JO - Journal of Plant Nutrition and Soil Science
JF - Journal of Plant Nutrition and Soil Science
SN - 1436-8730
IS - 3
ER -