Graduate Thesis Or Dissertation

 

Sewer system rehabilitation and the effectiveness of chemical grouting Public Deposited

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https://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/n870zw268

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  • The City of Salem, Oregon has an active sewer main chemical grouting program for the control of groundwater infiltration into the sewer collection system. The effectiveness of this chemical grouting program is evaluated by a comparison to other effective chemical grouting programs for control of inflow/infiltration (I/I). The importance of I/I control is discussed as well as generally accepted methods of collection system rehabilitation. Key elements of successful rehabilitation programs are presented along with discussion of past rehabilitation studies conducted in the City of Salem. The need for service lateral rehabilitation is promoted as an integral component of comprehensive I/I control. The City of Salem's current grouting program is described in the context of its Public Works Department structure, I/I problems, and related rehabilitation efforts. Chemically grouted joints of non-rubber gasket, concrete pipe are evaluated for longevity based on grouting records dating back to the early 1970's. It was concluded that the effective lifetime for these joints in City of Salem is 15.6 years ± 0.3 years for a 95% confidence level. Conclusions and recommendations are presented that are intended to enhance the effectiveness of the grouting program and the overall I/I abatement program in the future.
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