关键词: 堤防工程, 渗流分析, 减压井, 数值模拟

Abstract:

In this paper, the seepage finite element method (FEM) is used to simulate the transient seepage of Beijiang dike, and anti-seepage solutions is designed and optimized.Firstly, the measured data of pressure gauge tube are compared with the steady-state calculation model, and the calculated results are basically in agreement with the measured data.Then, the transient seepage field after the sudden rise of water level in a short time is calculated. Finally, relief wells are selected as seepage control measures and optimized. The results show that higher safety measures should be made for transient at the same level as steady state. When the water level is 15.78 m, the slope reaches 0.5, and the embankment is damaged. The drainage and decompression effect of relief wells is greatly affected by penetration depth. With the increase of penetration depth, the effect of drainage and decompression in the same permeability coefficient soil layer increases gradually, and the effect of drainage and decompression in the depth of 3/5 and 4/5 is relatively small due to geological strips. Due to the different geological conditions, the same relief wells are placed in different positions with a wide gap in effect.，the anti-seepage effect is the best when the horizontal distance is 95 m, and the effect is the best when the depth is 16.5 m.

Key words: dike engineering, seepage analysis, relief well, numerical simulation