| Summary: | 碩士 === 國立臺北科技大學 === 土木工程系土木與防災碩士班（碩士在職專班） === 103 === Due to the crisis brought by climate change and limited resources, all of the industries need to find out the source and solutions against global warming and greenhouse effect. For example, Taiwan’s carbon emissions was ranked 27th of the world in 2008, which civil engineering and construction industries are top of 33%. In water consumption, for example, Taiwan ranked 18th as the world&;#39;s water shortage (2015), in which the average construction site with water up to 10-20 ton / day (2013), In addition, the construction industry consider not only program, cost, quality and security, but also needs to mitigate carbon emissions and water consumption from construction processes. Thus, we need to offer a reduction strategy, and choose the most sustainable and ecofriendly alternative.
lifeline system crucial to national competitiveness and the uncertainty of the highest underground excavation works. This study presents the methodology for estimating the carbon footprints, water footprints, and Environmental Impact generated from construction processes using the LCA tools SimaPro 8 and Umberto Carbon footprint Calculator.The assessment of carbon footprints , water footprints and Environmental Impact from materials and machines resource tables of PCCES.We holistic to &;quot;value engineering&;quot;, that identifies the opportunities to mitigate such impact by Planing/Design and Construction Stages.
A case study of the Pipe-Jacking using this methodology in Planing/Design and Construction Stages. shows that carbon footprints due to 0.27-7.2 tCO2e/ m2/ m, water footprints due to 1384 -11917 (m3/m2/m) and Environmental Impact due to 41.36-253.68 (pt/m2/m).We changes of steel proceesing , reduces cement and construction methods that will be reduced about 34.09%(29.01 tCO2e), 39.82%(142300m3) and 40.5% (3.72kpt) as a method of Environmental Impact reduction. Hopefully, in future underground excavation constructions, this methodology can be taken into account as the proper guide for resources conservation.
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