Cause Analysis and Lessons of the Accident on Dam Culvert
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Abstract:
A new dam culvert was built using the horizontal directional drilling method in a reservoir of Jiangxi Province, but it collapsed after a few months of operation. In order to explore the feasibility of the horizontal directional drilling method in the reservoir engineering, the causes of the accident were analyzed using the recomputation and analytic hierarchy process. Moreover, the characteristics of reservoir engineering were considered, which provided the lessons from the aspects of design, construction, and management. The results indicated that the horizontal directional drilling method is feasible theoretically and technically. However, a reasonable design, a straightforward target, and an appropriate selection of material were required to ensure the safe operation of the project with the assurance of the key technologies such as the drilling mud ratio, grouting pressure, and backfill grouting, and the strict construction management.
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