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Sewage facilities are "modernization" of basic indicators, it is a symbol of civilization, the construction of urban sewage healthy development of important public works, public health relevant to the quality of a country is very huge, so the sewer construction is regarded as national infrastructure around the world construction, the assessment of national competitiveness School of Management in Lausanne, Switzerland, to "public sewage penetration rate" for the "Health and environment" indicators, such as sewer lines can apply for accelerated progress, will be able to effectively improve the penetration of domestic sewage, better enhance the competitiveness of countries. Domestic sewage is currently limited due to the construction of urban construction have been developed to reduce the impact of the construction process, the quality of life of people in the surrounding neighborhood, so most of the excavation work toward free method of forward direction, while free excavation in Taiwan has implemented three ten years, initially from abroad this construction method and construction-related machinery and equipment, construction has encountered many obstacles, but by past construction experience sharing and case studies scholars to explore a lot of information and feedback, etc. construction is now promoting domestic technology and geological factors to overcome the obstacle avoidance techniques have switched mature; obstacle after obstacle because the main factor in past construction experience via feedback and gradually exclude, but to highlight the impact of secondary factors; while Republican nine decades, research by Wu Cheng-chung sewer construction once adopted under short pipe jacking method summarized several factors that affect the cost, which places the tube moved factors led affect the proportion accounted for 42%, while the factors that not only allow the tube to move the slow progress of the project was completed within the foreseeable future, more funding so that the project does not work as expected expenditures, this phenomenon was always after completion, when the owners of the accounts only way to support the actual statistics of fees and extension of the duration. This pipe has now moved to the factors affecting the ratio is higher than the year of the survey, leaving estimates and accounts restated results far, this research area by Keelung Pak sewage works as a case, the information collected case scenario execution, as practice analytical basis. At present the findings to indicate that the city adopt a short pipe jacking method of the importance of the pipeline relocation experience, hope and later in a similar urban planners and designers to promote the region Preliminary engineering methods have to have this consideration, would make more practical implementation of sewage works helpful.
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