| 摘要: | 台灣隨著經濟之繁榮發展，人口越往都市集中，建築開發商以有限之都市土地，創造最大之容積使用率，謀求最大之商業利益，致建築物越往高層建築發展，而鋼骨鋼筋混凝土構造(Steel Reinforced Concrete,以下簡稱SRC)，其耐震性遠比鋼筋混凝土構造佳且構件斷面較小，可創造室內較佳之空間使用，是一種安全且適合台灣居民使用習慣之構造。
一般常見之SRC結構施工法，包含順打工法、逆打工法與雙順打工法等，因構造為兩種不同材料之結合，工期為兩者之疊加，若採傳統之順打工法，工期將無法符合開發商之時程需求且無法滿足購屋者期望早日入住之期待。
因逆打工法與雙順打工法是比較新的工法及技術，目前業界並未有一套快速的推估方法得以正確估算其所需之工期，過往皆依賴估算者自身之經驗來約略估算，並據此選擇或搭配工法後，再依此估算其所需之工期，沒有一套系統化之論述或流程作為其估算之依據，所得之成果常與實際之差異過大，因此，不同工法之選擇或組合搭配，將產生不同之工期，而如何選擇正確之工法及妥善安排各作業項目之工序，將會是影響概估值之重要原因，亦是值得深入去探討與瞭解之課題。
本研究擬建立一套工期概估之方法，以提供開發商或設計者於工法選擇上，有一定之依據，並對其所需之工期，有一快速準確之推估方法，期能改善過去推估值與實際值差異過大之缺點，以避免開發商因此產生不必之損失。
關鍵字：高層建築、鋼骨鋼筋混凝土構造、順打工法、逆打工法、雙順打工法
;With the prosperity and development of Taiwan’s economy, the population is more concentrated in the city, and the construction developers exploit limited urban lands to create the largest volume utilization rate and seek the greatest commercial benefits. As a result, high-rise buildings are getting popular and steel reinforced concrete (SRC) used for such buildings is a safe and suitable structure for Taiwan residents because of its superior seismic resistance to reinforced concrete structures and better indoor space usage for its smaller cross-sectional components.
Common SRC structure construction methods, include bottom-up method, top-down method and up-up method. A SRC structure involves two different types of material, and thus, its construction duration is the superposition of those of structures using respective material. If traditional bottom-up construction method is adopted, the construction period is unable to meet developers′ schedule needs and buyers′ expectations of early move-in.
Because top-down method and up-up method are relatively new construction methods and techniques, there is currently no approach in the industry to fast and correctly estimate their required construction durations. Currently, an approximate construction duration estimate is first obtained based on an estimator’s experience, and the estimate is then used to select and combine construction methods; a final duration estimate is calculated according to the selected construction methods. That is, there is no systematic discussion or process as the estimation basis, making the obtained estimating result often different from an actual duration. Thus, the selection and combination of various construction methods will result in different construction durations. How to select correct construction methods and properly arrange the sequence of activities will be an important factor affecting an estimated duration and is also a subject worthy of further study and discussion.
This study aims at developing an approach for approximately estimating construction durations to provide developers or designers with a basis for construction method selection and rapid and accurate duration estimation for the selected construction method. The proposed approach is expected to improve the shortcoming of having large difference between estimated and actual durations to avoid unnecessary losses for developers.
Keyword: high-rise building, steel reinforced concrete structure, bottom-up method, top-down construction method , up-up construction method |
