海底隧道涌水量与覆岩厚度关系研究

THE RELATION BETWEEN SEEPAGE VOLUME AND ROCK COVER THICKNESS IN SUBSEA TUNNEL

对半无限空间水文地质模型,分别采用经验解析法和数值模拟法计算海底隧道涌水量,分析海底隧道涌水量与覆岩厚度的关系．并根据日本最小涌水量法,对上述计算结果进行插值,求出不同海水深度所对应的最小覆岩厚度．最后,拟合出海水深度与最小覆岩厚度关系的直线公式．

In the subsea tunnel construction, the seepage volume and the minimum rock cover are most important in the drainage design of the tunnel, and in the tunnel route selection. With the hydro-geological model of half infinite space, the seepage water volume is computed both by analytical method and numerical simulation, and the relation between seepage volume and rock cover thickness is analyzed. According to the rock cover thickness determined by the minimum seepage volume, a linear relation between sea depth and rock cover thickness is obtained.