单个粘土体裂缝中水流规律的研究

THE STUDY OF WATER-FLOW IN A CLAY FRACTUER

通过模型实验,研究粘土体裂缝中的水流规律,提出了临界水位上升速度的概念。水位上升速度大于临界值时,裂缝中水流量增加,反之则减少。裂缝水流量与水位不呈正比关系。指出粘土裂缝中最大水流量要比相同条件下基岩裂缝水流量小30—40倍。随着水流运动的延续,水流量将逐渐变小。在水流作用下,粘土裂缝宽度将变窄3.0—4.0cm,裂缝深度也大幅度变浅到裂缝水深的50％以上。

The present paper tries to study through model experiments the law governing the waterflow in clay fractures and proposes the concept of the critical rising rate of the waterhead. When the rising rate of waterhead is greater than the critical value, the water-flow in fracture increases; otherwise, the water-flow decreases. The water-flow in fracture is not directly proportional to the waterhead. Under the same conditions the maximum water-flow in rock fracture is about 30—40 times that in the clay fracture. As the water-flow coninues, it will gradually decrease in the clay fracture, the width of the fracture will narrow 3—4 cm and the depth of the fracture will greatly decrease to about 50% of the average depth of the fracture water.