Funktionskrav på vägars bärighet
(2020) In LUTVDG/(TVTT-5307)/1-63/2020 VVB820 20201Transport and Roads
- Abstract
- The Swedish Transport Administration procures performance contracts to increase the attractiveness of the construction industry. In this procurement, The Swedish Transport Administration has transformed technical solutions into functional requirements. This allows the contractor to develop his own technical solutions.
As a customer, The Swedish Transport Administration needs to find out the quality of the product that is delivered. The quality can be investigated through a load bearing capacity control. In this master's thesis, the concept of load bearing capacity is used to describe the road structure's ability to receive loads from traffic before failure.
The client has developed a test of bearing capacity to determine whether the... (More) - The Swedish Transport Administration procures performance contracts to increase the attractiveness of the construction industry. In this procurement, The Swedish Transport Administration has transformed technical solutions into functional requirements. This allows the contractor to develop his own technical solutions.
As a customer, The Swedish Transport Administration needs to find out the quality of the product that is delivered. The quality can be investigated through a load bearing capacity control. In this master's thesis, the concept of load bearing capacity is used to describe the road structure's ability to receive loads from traffic before failure.
The client has developed a test of bearing capacity to determine whether the road will last during its entire lifespan. The control requirements are in the form of a falling weight deflectometer performed during the minimum guaranteed instruction period. Implementation requirements exist today, however the monitoring of the measurement results are missing since there is no required limit to be met by the control.
In this thesis, the conditions and consequences of using traditional Falling Weight Deflectometer (FWD) as a functional requirement is investigated. Should demands be made on the bearing capacity in a design, construct and maintain contract? In this case, what kind of measurement should be used?
The thesis has been carried out by analyzing three different study objects to evaluate if FWD measurements are applicable to all different types of roads. Interviews have also been conducted to get a deeper understanding on the subject and problem area.
The conclusions that can be drawn are; Demands on the load bearing capacity should be made because performance requirements on load bearing capacity is the only way to check if the delivered road will last the entire design period. If the measurement is performed according to the method description, there should be no uncertainties in the measurement results. The study objects show that control requirements with a Falling Weight Deflectometer (FWD) measurement can be used on all types of roads, but the method needs to be adjusted for roads with shorter distances. Measurements that are beneficial to use in reporting/documenting load bearing capacity are SCI, BCI and subgrade modulus. The SCI to be used to control the surface course and binder course, BCI to control the structure of the base course and sub-base course and the subgrade modulus to control the structure of the terrace. With the conclusions above recommendations have also been made to follow up the work. (Less) - Abstract (Swedish)
- Trafikverket upphandlar funktionsentreprenader för att öka attraktiviteten hos anläggningsbranschen. I denna upphandlingsform har Trafikverket omvandlat tekniska lösningar till funktionskrav, som i sin tur tillåter entreprenören att komma på egna tekniska lösningar.
Trafikverket som beställare behöver veta kvalitén på vägen som levereras i slutet av garantitiden. Kvalitén kan undersökas genom bland annat bärighetskontroll. I detta examensarbete används begreppet bärighet för att beskriva vägkonstruktionens förmåga att ta emot laster från trafiken innan den bryts ner.
Beställaren har tagit fram kontrollkrav på bärighet för att undersöka om vägen kommer att hålla under hela den beräknade livslängden. Kontrollkraven är i form av... (More) - Trafikverket upphandlar funktionsentreprenader för att öka attraktiviteten hos anläggningsbranschen. I denna upphandlingsform har Trafikverket omvandlat tekniska lösningar till funktionskrav, som i sin tur tillåter entreprenören att komma på egna tekniska lösningar.
Trafikverket som beställare behöver veta kvalitén på vägen som levereras i slutet av garantitiden. Kvalitén kan undersökas genom bland annat bärighetskontroll. I detta examensarbete används begreppet bärighet för att beskriva vägkonstruktionens förmåga att ta emot laster från trafiken innan den bryts ner.
Beställaren har tagit fram kontrollkrav på bärighet för att undersöka om vägen kommer att hålla under hela den beräknade livslängden. Kontrollkraven är i form av fallviktsmätningar som utförs under garantitiden. Krav på genomförande finns idag men uppföljning av mätresultaten saknas, det finns alltså ingen kravgräns som kontrollen skall uppfylla. I detta arbete undersöks förutsättningar- och konsekvenser av att använda bärighet som ett funktionskrav. Bör krav ställas på bärighet i totalentreprenader? Vilka bärighetsmått bör i så fall användas? Arbetet har genomförts genom analys av tre olika studieobjekt för att undersöka om fallviktsmätningar är tillämpbara för alla sorters vägar. Intervjuer har även utförts för att få en djupare förståelse kring problematiken.
Slutsatsen är att funktionskrav på bärighet är det enda sättet att kontrollera om vägen kommer att hålla under hela dimensioneringsperioden, vilket medför att krav på bärighet borde ställas på funktionsentreprenader. Utförs mätningen enligt metodbeskrivningen borde det inte finnas osäkerheter i mätresultaten. Studieobjekten visar att kontrollkrav med fallviktsmätning går att använda vid alla typer av vägar men att metoden behöver justeras vid kortare sträckor. Mått som är fördelaktiga att använda vid redovisning av mätkontrollen för att beskriva bärighet är SCI, BCI och undergrundsmodul. SCI används för att kontrollera överdelen av vägkonstruktionen, BCI för att kontrollera underdelen av konstruktionen och undergrundsmodul för att kontrollera terrassen. Med dessa slutsatser har också några rekommendationer för fortsatt arbete föreslagits. (Less) - Popular Abstract (Swedish)
- Trafikverket har ställt krav på bärighet för totalentreprenader men ingen kravgräns har lagts.
I examensarbetet “Funktionskrav på vägars bärighet” undersökts det om bärighetskrav med fallviktsapparat behövs och hur kravgränsen i sådana fall bör se ut.
Please use this url to cite or link to this publication:
http://lup.lub.lu.se/student-papers/record/9028535
- author
- Rashid, Laila LU
- supervisor
-
- Sven Agardh LU
- organization
- alternative title
- Demands on the Load Bearing Capacity of Roadways
- course
- VVB820 20201
- year
- 2020
- type
- H3 - Professional qualifications (4 Years - )
- subject
- keywords
- Bärförmåga, Fallvikt, SCI, BCI, Ytmodul, Bärighetsklass, Funktionsentreprenad, Funktionskrav
- publication/series
- LUTVDG/(TVTT-5307)/1-63/2020
- report number
- 340
- ISSN
- 1653-1922
- language
- Swedish
- id
- 9028535
- date added to LUP
- 2020-09-09 11:26:40
- date last changed
- 2020-10-01 13:53:57
@misc{9028535,
abstract = {{The Swedish Transport Administration procures performance contracts to increase the attractiveness of the construction industry. In this procurement, The Swedish Transport Administration has transformed technical solutions into functional requirements. This allows the contractor to develop his own technical solutions.
As a customer, The Swedish Transport Administration needs to find out the quality of the product that is delivered. The quality can be investigated through a load bearing capacity control. In this master's thesis, the concept of load bearing capacity is used to describe the road structure's ability to receive loads from traffic before failure.
The client has developed a test of bearing capacity to determine whether the road will last during its entire lifespan. The control requirements are in the form of a falling weight deflectometer performed during the minimum guaranteed instruction period. Implementation requirements exist today, however the monitoring of the measurement results are missing since there is no required limit to be met by the control.
In this thesis, the conditions and consequences of using traditional Falling Weight Deflectometer (FWD) as a functional requirement is investigated. Should demands be made on the bearing capacity in a design, construct and maintain contract? In this case, what kind of measurement should be used?
The thesis has been carried out by analyzing three different study objects to evaluate if FWD measurements are applicable to all different types of roads. Interviews have also been conducted to get a deeper understanding on the subject and problem area.
The conclusions that can be drawn are; Demands on the load bearing capacity should be made because performance requirements on load bearing capacity is the only way to check if the delivered road will last the entire design period. If the measurement is performed according to the method description, there should be no uncertainties in the measurement results. The study objects show that control requirements with a Falling Weight Deflectometer (FWD) measurement can be used on all types of roads, but the method needs to be adjusted for roads with shorter distances. Measurements that are beneficial to use in reporting/documenting load bearing capacity are SCI, BCI and subgrade modulus. The SCI to be used to control the surface course and binder course, BCI to control the structure of the base course and sub-base course and the subgrade modulus to control the structure of the terrace. With the conclusions above recommendations have also been made to follow up the work.}},
author = {{Rashid, Laila}},
issn = {{1653-1922}},
language = {{swe}},
note = {{Student Paper}},
series = {{LUTVDG/(TVTT-5307)/1-63/2020}},
title = {{Funktionskrav på vägars bärighet}},
year = {{2020}},
}