ENGINEERING

Erosion behavior according to location of conduit cracks in agricultural reservoir

Jung-Hyun Kim1   Joon Heo2   Jae-Woong Shim2   Cheol-Han Kim3   Bora Yun1   Yong-Hak Lee4,*   Dal-Won Lee1,*   

1Department of Agricultural and Rural Engineering, Chungnam National University, Daejeon 34134, Korea
2Rural Research Institute, Korea Rural Community Corporation, Ansan 15634, Korea
3Hyundai City Corporation, Taean 32156, Korea
4Institute of Agricultural Science, Chungnam National University, Daejeon 34134, Korea

Abstract

The conduits of agricultural reservoirs undergo deterioration over a considerable period of time and this is highly likely to cause structural problems such as cracks. It is therefore important to consider the effects of structural defects on the body from the viewpoint of stability and maintenance of the embankment. In this study, basic data on the effects of the crack location on the stability of the embankment is obtained by identifying, comparing, and analyzing the erosion characteristics and pore water pressure behavior through a large-scale model experiment that involves classifying the location of the conduit cracks. From the results of the experiment, it was confirmed that when a crack occurred, the amount of leakage increased as the location of the crack portion was closer to the water level, and the internal erosion phenomenon accelerated, thereby increasing the possibility of piping. It was also found that an upstream conduit crack affects the erosion and water pressure change of the central and downstream conduit of the embankment, and the conduit crack has a very large effect on the pore water pressure despite the low upstream water level. Therefore, the seepage behavior of the embankment for each conduit crack identified in this study is considered to be useful basic data for preparing a repair and reinforcement plan according to the crack location in the future.

Figures & Tables

Fig. 1. Conduit crack modeling. (a) Buried conduit, (b) conduit crack modeling, (c) improvement design model.