Utredning av Aktiv designprojektet vid RV40 - Chalmers tekniska ...

Investigation concerning the Active design project at RV 40
Direction towards development of an objective control method for future function
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SEBASTIAN MATTSSON & PETER SIPARI
Department of Civil and Environmental Engineering
Division of GeoEngineering
Road and Traffic group
Chalmers University of Technology
ABSTRACT
This master thesis has the intention to evaluate the Active design project on RV 40.
The evaluation is based partly on a literature study and a series of interviews. Beyond
this, practical tests have been carried out in order to find models for bearing capacity
calculations, and test methods to determine these. The series of interviews showed
that the project is positively experienced but that there are ways to improve it.
The tests have been performed through bearing capacity survey where static plate
load(SPL), heavy falling weight deflectometer(FWD) and continuous compaction
control(CCC) have been used. In the report, SPL and FWD have been mutually
compared, as well as they have been evaluated with the support of the application
VägFEM. VägFEM enabled evaluations of resilient modulus in the unbound granular
layers. The bearing capacity surveys were performed in points decided through CCC,
where the points with the lowest bearing capacity have been used as control objects,
which made it possible to compare the CCC with other models. The surveys showed
that a correlation between SPL and FWD can be determined, although there may be
deviations depending on the tested material. A correlation between SPL and CCC
could not be proved. Calculations with vägFEM showed that FWD results in a more
correct ground bearing capacity modulus than SPL.
Key words: Aktiv design, Static plate load, falling weight deflectometer, VägFEM
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