A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Durability of Materials in Pearl-Chain Bridges
This PhD thesis contributes to documentation regarding durability of materials used in so-called “Pearl-Chain Bridges”. The Pearl-Chain Bridge technology is a new precast bridge solution developed at the Technical University of Denmark. The technology reintroduces the arch structure as an economical beneficial solution primarily for road and railway bridges, and allows for the faster, more environmentally friendly, and cheaper construction of such bridges. A Pearl-Chain Bridge consists of two main parts: the load-carrying Pearl-Chain arch, and the fill material on top of the arch. The construction of the Pearl-Chain arch is simple. The arch is assembled on its side, next to the road that the bridge will span, by placing a number of plane prefabricated Super-Light Decks that consist of lightweight aggregate concrete and conventional concrete, in the desired arch shape. Mortar joints are cast between the decks, and because all decks have a duct cast through them longitudinally, they can be collected on a wire – like pearls on a string. The assembly of the arch is completed by post-tensioning the wire. A crane lifts the arch into place during the night, and subsequently the Pearl-Chain arch is stabilized by casting a fill material between the spandrel walls of the arch. Finally, the road surface is cast on top of the fill material. New bridges are designed for a service lifetime of at least 100 years. Hence, the specifications of the materials used in Pearl-Chain Bridges are high. This PhD study documents that the materials used in Pearl-Chain Bridges have the necessary strength and durability to ensure their longevity. The scope of the PhD study is limited to assessing the fill material placed on the Pearl-Chain arch, and the mortar joints and lightweight aggregate concrete used in the Pearl-Chain arch itself. This is because these materials, and the application of them, differ from the materials in typical bridge superstructures. Typically, arch bridges are filled with sub-base gravel; however, in order to ...
Durability of Materials in Pearl-Chain Bridges
This PhD thesis contributes to documentation regarding durability of materials used in so-called “Pearl-Chain Bridges”. The Pearl-Chain Bridge technology is a new precast bridge solution developed at the Technical University of Denmark. The technology reintroduces the arch structure as an economical beneficial solution primarily for road and railway bridges, and allows for the faster, more environmentally friendly, and cheaper construction of such bridges. A Pearl-Chain Bridge consists of two main parts: the load-carrying Pearl-Chain arch, and the fill material on top of the arch. The construction of the Pearl-Chain arch is simple. The arch is assembled on its side, next to the road that the bridge will span, by placing a number of plane prefabricated Super-Light Decks that consist of lightweight aggregate concrete and conventional concrete, in the desired arch shape. Mortar joints are cast between the decks, and because all decks have a duct cast through them longitudinally, they can be collected on a wire – like pearls on a string. The assembly of the arch is completed by post-tensioning the wire. A crane lifts the arch into place during the night, and subsequently the Pearl-Chain arch is stabilized by casting a fill material between the spandrel walls of the arch. Finally, the road surface is cast on top of the fill material. New bridges are designed for a service lifetime of at least 100 years. Hence, the specifications of the materials used in Pearl-Chain Bridges are high. This PhD study documents that the materials used in Pearl-Chain Bridges have the necessary strength and durability to ensure their longevity. The scope of the PhD study is limited to assessing the fill material placed on the Pearl-Chain arch, and the mortar joints and lightweight aggregate concrete used in the Pearl-Chain arch itself. This is because these materials, and the application of them, differ from the materials in typical bridge superstructures. Typically, arch bridges are filled with sub-base gravel; however, in order to ...
Durability of Materials in Pearl-Chain Bridges
Lund, Mia Schou Møller (author)
2016-01-01
Lund , M S M 2016 , Durability of Materials in Pearl-Chain Bridges . B Y G D T U. Rapport , no. R-341 , Technical University of Denmark, Department of Civil Engineering .
Book
Electronic Resource
English
DDC:
690
Precast Pearl-Chain concrete arch bridges
| Online Contents | 2015
Precast Pearl-Chain concrete arch bridges
| Elsevier | 2015