| Summary: | 碩士 === 國立高雄應用科技大學 === 土木工程與防災科技研究所 === 98 === At present the empirical rule is mostly used to estimate construction schedule of sanitary sewer in Taiwan. In recent years, although many researchers have studied on the investigation of the crew of construction rate based on Thomas’s productivity theory and multiple regression models, few study was carried on the verification and modification of crew-scheduling productivity model. Thus, this study estimates the difference between model-predicted productivity and actual productivity (using Pingtung city and Dashu township as the actual cases)
This research used the crew of a 700-mm jacking pipe as a model-predicted productivity (7.57 wh/m) to predict the productivity of case A and case B (400-mm jacking pipe). The results indicated that the both of model-predicted productivities are higher than the actual productivity. Then, we calculate the ratio of optimal productivity and model-predicted productivity (0.4465 and 0.2867, respectively). By the comparison of construction conditions, it shows that the overestimation influencing factor could be related to the shorter pipe-jacking size, the longer pipe-jacking length, and the better geological condition
Therefore, if the overestimation influencing factor can be controlled before construction, the adjustment factor of crew-scheduling productivity model will be good for the contractor accurately to estimate construction time and manpower arrangement. Further, the construction cost and construction efficiency can be controlled effectively.
|
|---|
