A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Life Cycle Assessment on fiber cable construction methods
The demand for effective and high-speed telecommunication is growing fast in line with developments in modern society. Old telecommunication infrastructure, based on copper cable networks, cannot supply this increasing demand. Fiber optic network has been developed as a proper solution due to its vastly higher capacity for information transmission than that of copper based networks. As a result for need of faster and more economical construction methods, new fiber construction methods have been developed as well. Some conventional fiber network construction methods (E.g. Conventional Excavation, Chain Excavator, and Ploughing) have previously been studied using Life Cycle Assessment (LCA) but no study on new methods (E.g. Micro Trenching, Narrow Trenching) with life cycle perspective has been performed yet. Construction of fiber cable networks requires high energy and material use. Building and construction are energy and material demanding processes, which have obvious effect on the environment, therefore conducting an LCA study on newer construction methods is necessary to be able to identify hotspots and to provide basis for choice of the most environmentally friendly construction method when developing fiber network. The three main phases of each construction method (excavation, laying, and recovery) and the related processes were included in the assessment of the present study. Due to different ground conditions and different applications of Swedish legislation regarding the reuse of the excavated mass, two different scenarios were modeled; with and without reuse of excavated mass in recovery phase as backfilling mass. The results of the LCA study showed that the recovery phase generally stands for the largest environmental impacts in all impact categories for all construction methods. The magnitude and the reason for this impact are different for construction methods applied on asphalt and on green space. In methods applied on asphalt without reuse of the excavated mass, the reason is impacts from asphalt ...
Life Cycle Assessment on fiber cable construction methods
The demand for effective and high-speed telecommunication is growing fast in line with developments in modern society. Old telecommunication infrastructure, based on copper cable networks, cannot supply this increasing demand. Fiber optic network has been developed as a proper solution due to its vastly higher capacity for information transmission than that of copper based networks. As a result for need of faster and more economical construction methods, new fiber construction methods have been developed as well. Some conventional fiber network construction methods (E.g. Conventional Excavation, Chain Excavator, and Ploughing) have previously been studied using Life Cycle Assessment (LCA) but no study on new methods (E.g. Micro Trenching, Narrow Trenching) with life cycle perspective has been performed yet. Construction of fiber cable networks requires high energy and material use. Building and construction are energy and material demanding processes, which have obvious effect on the environment, therefore conducting an LCA study on newer construction methods is necessary to be able to identify hotspots and to provide basis for choice of the most environmentally friendly construction method when developing fiber network. The three main phases of each construction method (excavation, laying, and recovery) and the related processes were included in the assessment of the present study. Due to different ground conditions and different applications of Swedish legislation regarding the reuse of the excavated mass, two different scenarios were modeled; with and without reuse of excavated mass in recovery phase as backfilling mass. The results of the LCA study showed that the recovery phase generally stands for the largest environmental impacts in all impact categories for all construction methods. The magnitude and the reason for this impact are different for construction methods applied on asphalt and on green space. In methods applied on asphalt without reuse of the excavated mass, the reason is impacts from asphalt ...
Life Cycle Assessment on fiber cable construction methods
Solivan, Shan (author)
2015-01-01
10
Theses
Electronic Resource
English
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