Impact of repetitive loading on subgrade parameters derived from light weight deflectometer test

Bartłomiej Krawczyk; Piotr Mackiewicz

doi:10.7409/rabdim.015.001

Published: 2015-04-22

Vol. 14 No. 1 (2015)

Impact of repetitive loading on subgrade parameters derived from light weight deflectometer test

Bartłomiej Krawczyk , Piotr Mackiewicz

Section: Articles

https://doi.org/10.7409/rabdim.015.001

Abstract

The most popular methods used for evaluation of subgrade bearing capacity with light weight deflectometer (LWD) assume linear-elastic behaviour of material. In these methods the input data used for identification of subgrade parameters are limited to initial loading cycles. Change of material parameters occurring under repetitive loading is not taken into consideration. Due to the characteristics of road building materials, including in particular granular materials, omitting the compaction resulting from repetitive loading is considered a rough approximation. Actually the subgrade parameters do change after each load application. It is generally accepted that after the third loading cycle (3rd drop) final degree of compaction is achieved and, as such, the vertical deflections obtained at the fourth, fifth and sixth cycles provide a representative measure of the subgrade parameters (calculated as an average of the three measurements). This paper presents the results of research carried out to verify the above-mentioned assumption by measuring subgrade displacements according to LWD test, followed by comparing the measurement results against numerically identified moduli of the respective layers. The authors have demonstrated that the identified subgrade parameters vary depending on the number of loading cycles (drops) in LWD test. Identification of subgrade parameters was carried out with 3D-FEM (Finite Element Method).

Keywords:

Light Weight Deflectometer, repetitive loading, subgrade parameters change

Most read articles by the same author(s)

Piotr Mackiewicz, Bartłomiej Krawczyk, Influence of loading time on subgrade parameters derived from VSS static plate test , Roads and Bridges - Drogi i Mosty: Vol. 14 No. 1 (2015)
Bartłomiej Krawczyk, Piotr Mackiewicz, Impact of reinforcement layer material and thickness on deflections measured in the static and dynamic plate load tests , Roads and Bridges - Drogi i Mosty: Vol. 15 No. 2 (2016)
Bartłomiej Krawczyk, Piotr Mackiewicz, Antoni Szydło, Influence analysis of counterweight type used in static plate test on identified parameters of pavement courses and subgrade , Roads and Bridges - Drogi i Mosty: Vol. 14 No. 2 (2015)
Piotr Mackiewicz, Antoni Szydło, Bartłomiej Krawczyk, Influence of the construction technology on the texture and roughness of concrete pavements , Roads and Bridges - Drogi i Mosty: Vol. 17 No. 2 (2018)
Bartłomiej Krawczyk, Antoni Szydło, Piotr Mackiewicz, Dariusz Dobrucki, Assessment criteria of the recycled aggregate cement bound bases , Roads and Bridges - Drogi i Mosty: Vol. 18 No. 2 (2019)
Bartłomiej Krawczyk, Antoni Szydło, Identification of homogeneous pavement sections , Roads and Bridges - Drogi i Mosty: Vol. 12 No. 3 (2013)
Bartłomiej Krawczyk, Antoni Szydło, Piotr Mackiewicz, Dariusz Dobrucki, Suitability of aggregate recycled from concrete pavements for layers made of unbound and cement bound mixtures , Roads and Bridges - Drogi i Mosty: Vol. 17 No. 1 (2018)
Antoni Szydło, Piotr Mackiewicz, Determination of deflections of an innovative pavement structure containing a three-component hydraulic binder , Roads and Bridges - Drogi i Mosty: Vol. 22 No. 1 (2023)
Bartłomiej Krawczyk, Piotr Mackiewicz, Dariusz Dobrucki, Use of plastic waste in cement-bound layers , Roads and Bridges - Drogi i Mosty: Vol. 22 No. 3 (2023)
Bartłomiej Krawczyk, Piotr Mackiewicz, Dariusz Dobrucki, Use of plastic waste in materials for road pavement construction and improved subgrade , Roads and Bridges - Drogi i Mosty: Vol. 21 No. 3 (2022)

Download files

PDF

Citation rules

Krawczyk, B., & Mackiewicz, P. (2015). Impact of repetitive loading on subgrade parameters derived from light weight deflectometer test. Roads and Bridges - Drogi I Mosty, 14(1), 5–17. https://doi.org/10.7409/rabdim.015.001

Cited by / Share

References

Badanie i ustalenie zależności korelacyjnych dla oceny stanu zagęszczenia i nośności gruntów niespoistych płytą dynamiczną. GDDKiA-IBDiM, Warszawa, 2005
Google Scholar

Ruta P., Szydło A.: Drop-weight test based identification of elastic half-space model parameters. Journal of Sound and Vibration, 282, 2005, 411-427
Google Scholar

TP BF-StB. Technische Prüfvorschrift für Boden und Fels im Straßenbau. Teil B 8.3. Dynamischer Plattendruckversuch mit Hilfe des Leichten Fallgewichtsgerätes, 1992
Google Scholar

Gosk W.: Badanie podłoża gruntowego za pomocą płyty dynamicznej ZFG-01 – ocena zastosowania modelu sprężystego do interpretacji wyników. Aparatura badawcza i dydaktyczna, 15, 2, 2010, 99-106
Google Scholar

Gosk W.: Zastosowanie metody stycznych do identyfikacji modułu sztywności podłoża gruntowego badanego płytą dynamiczną ZFG-01. Zeszyty Naukowe Politechniki Rzeszowskiej, Budownictwo i Inżynieria Środowiska, 59, 3/IV, 2012, 33-40
Google Scholar

Sulewska M.J.: Doświadczenia ze stosowania lekkiego ugięciomierza dynamicznego. Drogownictwo, 58, 11, 2003, 365-367
Google Scholar

Sulewska M.J.: Lekka płyta dynamiczna w zastosowaniu praktycznym. IBDiM, VII Międzynarodowa Konferencja „Trwałe i bezpieczne nawierzchnie drogowe”, Kielce, 2001, 139-145
Google Scholar

ZTVE-StB 94: Zusätzliche Technische Vertragsbedingungen und Richtlinien für Erdarbeiten im Straßenbau, Fassung 1997, FGSV Verlag, Köln
Google Scholar

ZTVA-StB 97: Zusätzliche Technische Vertragsbedingungen und Richtlinien für Aufgrabungen in Verkehrsflächen, FGSV Verlag, Köln
Google Scholar

Oome A.J.J.A., Janssen J.L.G., Encica L., Lomonova E., Dams J.A.A.T.: Modeling of an electromagnetic geophone with passive magnetic spring. Sensors and Actuators A: Physical, 153, 2, 2009, 142-154
Google Scholar

Light Weight Deflectometer for the dynamic plate load test. Terratest Instruction Manual. TERRATEST GbmH, Berlin, August, 2013
Google Scholar

Bejarano M.O.: Subgrade Soil Evaluation for the Design of Airport Flexible Pavements. University of Illinois at Urbana-Champaign, 1999
Google Scholar

Bartłomiej Krawczyk

b.krawczyk@pwr.wroc.pl

Affiliation:

Wrocław University of Technology, Faculty of Civil Engineering

Piotr Mackiewicz

Affiliation:

Wrocław University of Technology, Faculty of Civil Engineering

Impact of repetitive loading on subgrade parameters derived from light weight deflectometer test

Abstract

Keywords:

Similar Articles

Most read articles by the same author(s)

Downloads

Bartłomiej Krawczyk

Piotr Mackiewicz