Service Life of Culverts (2015) / Chapter Skim
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Pages 46-50
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From page 46... ...
44 CHAPTER EIGHT CONCLUSIONS This chapter summarizes the key findings of this study, including the state of the practice for the required service life for culverts in varying conditions, the basis for determining the service life, the range of processes that cause culverts to deteriorate and how they are controlled, the time for a particular material to reach the end of its useful service life, methods to allow the useful service life of culverts to be extended, and information on how the concepts of material service life and culvert failure limit states are correlated. This chapter also identifies gaps in current knowledge and implementation, and research needs.
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From page 47... ...
45 additional research. The time to reach a defined level of section loss by corrosion in metal pipes can be predicted, but this definition of loss of serviceability does not explicitly address a critical pipe failure mode.
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46 report" form. In one of the case studies, it was noted that whereas the actual cost of emergency repair was more than $4 million, when user-delay costs were factored in, the cost exceeded $8 million.
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47 in place for a further 5 years until road rehabilitation is required. Clearly, deferral of pipe rehabilitation to coincide with road rehabilitation can be cost-effective, provided the risk can be managed.
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From page 50... ...
48 (or other service impacts) related to pipe joints.
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