| Title |
Piping Analysis of Reservoir Embankment due to Leakage of Buried Box Culvert |
| Authors |
김한일(Kim, Han il) ; 양학영(Yang, Hak Young) ; 김영묵(Kim, Young Muk) |
| DOI |
https://doi.org/10.12652/Ksce.2017.37.5.0787 |
| Keywords |
제체;파이핑;침투 해석;누수;배수 통관 Embankment;Piping;Seepage analysis;Leakage;Box culvert |
| Abstract |
Although the long-term leakage between the box culvert and the soil contact surface is one of the main causes of the failure in the embankment of the reservoir, there is a little studies on this matter. If a leakage occurs by the structure such as the buried box culvert of reservoir embankment is partially damaged, it is difficult to observe and there is a possibility of damage caused by piping. For these reasons, more research is necessary. In this study, the embankment type of the reservoir is divided into the core type and the homogeneous type when the damaged box culvert passing through the embankment of the reservoir is leaked due to the differential behavior of materials like differential settlement. In view of the condition, the seepage analysis of 2D was performed according to the water level change. The result of the study shows that the possibility of piping increases at the upper part rather than the bottom part of the box culvert when the leakage occurs to the box culvert passing through the embankment of the reservoir. Particularly, it is considered that the presence of the core helps to maintain the seepage stability of the embankment in case where the leakage occurs at the downstream side of the embankment. Also, if there is a drastic decrease on the internal pore water pressure in the embankment of reservoir, it is necessary to consider the possibility of piping. |