| dc.description.abstract | With rapid development of domestic economy at early stage, metropolitan that owns more sources can attract inflows of students and working population everywhere; however, urban population will be risen sharply making the relative residents living environment and health habit change accordingly. In the past, household sewage was made to flow into the ditch before discharging to the river. It not only affected water quality and water body to damage the environment, much worse, but also allowed infectious disease to travel and harm resident’s health. Therefore, sanitary sewer system should be urgently built in metropolitan region to accelerate the improvement of citizen living environment, so as to improve urban environmental health.
Although sanitary sewer construction and management in municipalities and local governments are expressly stipulated as local self-government in accordance with Local Government Systems Act, division of authority and responsibility in sanitary sewer construction promoted by central and local governments is also specified according to Sewerage Act. Based on the example of New Taipei City for practical promotion, a huge veins carrying system is generated with accumulated increase of penetration rate of pipe works in recent years. Consequently, pipe jacking method for open cutting or non-excavation is normally used in sanitary sewer engineering work. Pipe jacking method is a common method used to excavate the sewer in metropolitan region, which is mostly used for roadways in six municipalities and local governments.
In order to verify reasonability and practicability of this research mode, this study took an example of execution crew assignment for round steel pipe earth-retaining working well preset in pipe jacking engineering for small diameter sanitary sewage pipe, working area in which execution crew includes owned and external excavator with long arm bucket and hydraulic casing oscillator are used for simulation test to acquire minimum cost through optimization. Compared to the cost by human experience in the dispatching, the result showing low cost and more efficient way can be confirmed to provide for decision maker’s precise judgment. In consequence, this study is also applicable to the issues relating to crew assignment in sanitary sewer engineering.
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