Valvbågar mindre än två meter: Geotekniska och hydrauliska förutsättningar samt förslag till dimensioneringsansvisningar
Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
The Swedish Transport Administration in Norr- and Västerbotten has observed many problems with bottomless arch culverts with a span less or equal to two meters. Up until now the focus has been the environmental improvements, mainly to enhance fish migration, and less respect has been given the technical requirements for the construction.To learn about the damages on the structures and the building process, several bottomless arch culverts has been studied. Information has been collected from articles and reports to study how water streams affects the construction and how to prevent damages. The Swedish Transport administrations set of regulations for how to build in water has been studied, and adapted to the bottomless arch culvert.The most severe problems for the bottomless arch culvert is deficient foundation, poor or non-existing riprap protection and maybe the most important; the absence of an actual design process when the span is less than two meters. The objective has been to compile explicit guidelines for how to design and later on construct a bottomless arch culvert. Set of regulation has been drawn up for riprap protection, protection towards frozen ground and the dimensions of the culvert. Drafts has been made for cross-sections and a outline of how to carry out the construction.This Master thesis will hopefully be implemented in the regulations of the Swedish Transport Administration to improve future design of the bottomless culverts.
Place, publisher, year, edition, pages
2011. , 97 p.
Teknik, valvbågar, vägtrummor, fiskvandring, vandringshinder, trafikverket, erosionsskydd
IdentifiersURN: urn:nbn:se:ltu:diva-47075Local ID: 4a9db256-3ee0-4e89-a44c-9490fe5f87bcOAI: oai:DiVA.org:ltu-47075DiVA: diva2:1020391
Subject / course
Student thesis, at least 30 credits
Civil Engineering, master's level
Validerat; 20110613 (anonymous)2016-10-042016-10-04Bibliographically approved