| Summary: | 碩士 === 朝陽科技大學 === 營建工程系碩士班 === 95 === Backfills for domestic pipeline projects are constrained by unsuitable material supply and short construction cycle, in addition to various factors such as inconsistent work qualities delivered by contractors. Thus, even the roads are repaved after completion of pipeline digging and backfilling, the surface of the road still could cave in, crack and peel off. These defects can cause traffic accidents and threaten lives and the safety of properties. In light of the above mentioned, domestic industries, proper authorities and academics collectively imported Controlled Low Strength Materials (CLSM), which are common practices in European and US, to replace the traditional backfill materials used by pipeline projects.
This research adopts actual CLSM cases and its practiced results from relevant pipeline organization in central Taiwan, for comparison and verification, so as to understand compound mixes from various materials, and the relationship with ensuing construction cost. Then, this study illustrates relevant quality management and test mix result of CLSM test mixing processes, in order to explore the discrepancies in construction scheduling, material and cost between applying CLSM and traditional backfill materials. Therefore, at the planning stage, the compressive strength should be decided and adjusted according to existing conditions for car traveling on the roadway. Moreover, in cost consideration for construction residual soil, this study compares the cost differences for adopted indirect transport and direct handling. In addition to reflect on abiding laws prescribed by both central and local government, and regulations stipulated by the governing authorities, this study also explores how to effectively implement the application of onsite construction residual soil unto CLSM construction. Finally this study proposes relevant suggestions and hopes to effectively solve CLSM
construction problems. Hence, it can be used as future references in the field of engineering.
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