Abstract

Conventional landslide drainage methods always seem to lack a long-term and efficient drainage capacity. Thus, it is necessary to develop a new drainage method that does not have these disadvantages. In this study, a new, self-starting drainage method is proposed based on the results of tests that were conducted with a physical model. The principle involved is that the drainage starts automatically when the level of the groundwater above the front end of the permeable pipes is higher than the orifice. A vacuum is generated in the permeable pipe after the flow begins in the pipe, and it is transmitted forward in the surrounding soil. Then, an unsaturated zone can be created in the soil during the transmission process, so the stability of the slope is expected to be improved. The results of the model test indicated that the diameter of the hose is an important factor that affects the drainage. Compared with siphon drainage, this method solves two problems simultaneously, i.e. it avoids the accumulation of air that could interfere with the siphon effect and it avoids the manual start-up.

摘要

传统的滑坡排水方法似乎总是缺乏长期有效的排水能力。因此，有必要开发一种没有这些缺点的新排水方法。在这项研究中，基于使用物理模型进行的测试结果，提出了一种新的自启动排水方法。其原理是当透水管前端以上的地下水位高于孔口时，自动开始排水。在管道中开始流动后，在可渗透管道中产生真空，并在周围土壤中向前传递。然后，在传输过程中可以在土壤中形成一个非饱和区，因此可以提高边坡的稳定性。模型试验结果表明，软管直径是影响排水的重要因素。与虹吸排水相比，该方法同时解决了两个问题，即避免了空气的积聚而干扰虹吸效果，避免了人工启动。