| 英文摘要 |
In the design of buried water pipelines, most of the pipes are buried more than one meter deep due to roadway usage. However, besides water pipelines, telecommunication cable systems and other utility systems are also located underground, especially in densely populated urban areas. Such occupation leads to burying newly constructed water pipelines in deeper or shallower locations. Nowadays, controlled low-strength material (CLSM) is used as backfill to enhance the capacity of shallow buried water pipelines. The performance of CLSM as a backfill material cannot be easily assessed empirically. Therefore, this study analyzed ductile iron pipe (DIP), which is commonly used in water pipeline systems, with CLSM backfill under the impact of truck loading. Five different sizes of DIP were evaluated at four different buried depths. The effect of CLSM strength was also discussed. Analyses were conducted with the finite element software LS-DYNA. The results of this study could provide a reference for designing shallow buried DIP systems for future engineering projects. |
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