Stability Improvement Method for Embankment Dam with Respect to Conduit Cracks
Source abstract
Abstract
In recent years, as the number of reservoir embankments constructed has increased, embankment failures due to cracks in aging conduits have also increased. In this study, a crack in a conduit was modeled based on the current conduit design model, and the risk of internal erosion was analyzed using a large-scale model test and three-dimensional deformation–seepage analysis. The results show that when cracks existed in the conduit, soil erosion and cavitation occurred near the crack area, which made the conduit extremely vulnerable to internal erosion. Herein, a model is proposed that can reduce internal erosion by applying a layer of sand and geotextiles on the upper part of the conduit located close to the downstream slope. In the proposed model, only partial erosion occurred inside the conduit, and no cavitation appeared near the crack in the conduit. The results suggest that internal erosion can be suppressed when the water pressure acting intensively on the crack in the conduit is dispersed by the drainage layer. To validate these results, the pore water pressure, seepage line, and hydraulic gradient were investigated to confirm the erosion phenomenon and reinforcement effect.
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Research context
OpenAlex topics: Dam Engineering and Safety · Hydraulic flow and structures · Hydrology and Sediment Transport Processes
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Institute of Agricultural Science, Chungnam National University, Daejeon 34134, Korea
Department of Agricultural and Rural Engineering, Chungnam National University, Daejeon 34134, Korea
Rural Research Institute, Korea Rural Community Corporation, Ansan 15634, Korea
Funding
Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education · National Research Foundation of Korea (NRF) grant funded by the Ministry of Science, ICT & Future Planning of the South Korean Government · Korea Institute of Planning and Evaluation for Technology in Food, Agriculture and For-estry (IPET) through Agricultural Infrastructure and Disaster Response Technology De-velopment Project, funded by Ministry of Agriculture, Food and Rural Affairs (MAFRA
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