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本文计算不透水铺盖中裂缝对流场的影响,从单一裂缝入手,用保角变换求得浅沟的正对称流解,然后应用叠加法得出非对称流解,另外还考虑了水流经过铺盖窄缝的水头损失。严格地解出了裂缝附近的位势分布。文中导出了有限深透水基础上的铺盖发生裂缝以后,以裂缝位置和裂缝宽度为参数的透水基础顶板的渗透压力水头分布和因裂缝而增加的渗流量的计算公式,利用单一裂缝的解进行叠加,进一步导出了多条裂缝时,以不同位置和裂缝宽度为参数,分析了透水地基顶板上的渗透压力水头分布和由于裂缝而增加的渗流量计算公式,并附了有限深透水地基上的铺盖均质土坝的算例。最后讨论了有限深透水地基上的铺盖心墙上坝的情况。
In this paper, the influence of cracks on the flow field in impervious blanket is calculated. Starting from a single crack, the positive symmetric solution of shallow groove is obtained by conformal transformation. Then the asymmetric flow solution is obtained by superposition method. In addition, Narrow slit head loss. Strictly solved the fracture potential distribution. In this paper, the formulas of calculating the seepage pressure head of pervious foundation roof with the parameters of crack location and crack width and the seepage flow increasing due to the crack are deduced, , And further derives a number of cracks, taking different positions and crack width as parameters, the paper analyzes the head distribution of seepage pressure on the pervious foundation roof and the formula of seepage flow increasing due to cracks, and attaches the cover on the limited deep seepage foundation An example of a homogeneous earth dam. Finally, we discuss the situation of dam covering the core wall on the limited deep seepage foundation.