Improvement to preparing construction budget items for carbon calculations-Harbor construction project as an example

• Main Authors: Kuan-ChinFang, 方冠今
• Other Authors: Hsing-Tao Chang
• Format: Others
• Language: zh-TW
• Published: 2017
• Online Access: http://ndltd.ncl.edu.tw/handle/wajd7u

碩士 === 國立成功大學 === 土木工程學系 === 105 === Evaluating sustainability of construction projects has become a trend. A construction project uses large amount of materials and equipment, which causes much CO2 emission. Most research uses similar method to calculate carbon emissions. But there is no research to solve data avalibility problems faced during calculation. This research used a case of harbor construction to calculate the CO2 emission by analyzing the material and equipment quantities of the items in the bill of quantities, unit-price analysis table and resource table. The total contract amount of the project is NT$ 8.7 billion. The allowd CO2 emission calculation amount is NT$ 7.3 billion, which is about 83.8% of the total amount of the case project. The calculated total emission of the case project is 382,474 tonCO2e. The total amount of the data avalibility for calculation problems is NT$ 1.4 billion, which is about 16.2% of total amount of the project. This research classified data problems encountered during calculation into three categories including 10 subcategories. The three categories are: (1) lack of carbon emission coefficients, (2) data without quantitative unit, and (3) lack of data. Their amounts are 19.2%, 28.2%, and 52.6%, respectively. To improve the situation, data can be better prepared by the designers. They can be also collected from the contractor if the project is under construction. When the problems cannot still be resolved after inquireing the designer and contractor, they can be derived from studies and calculated by using the assumptions proposed in this research. By applying the assumptions and improvement methods proposed in this research, the amount that CO2 emission can be calculated becomes NT$ 8.2 billion, which is 10.6% more than the original amount that can be calculated and goes up to 94.4% of the total amount of the case project. The amount that CO2 emission could not be calculated is NT$ 489 million, about 5.6% of total amount of the case project. The total emission becomes 438,102t onCO2e additionally calculated, 14.5% of the original CO2 emission.