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虹吸排水是一种免动力并能够实时排除坡体深部地下水的有效措施,通过合理布置虹吸排水孔群可以显著降低地下水位并较大程度地增强边坡的稳定性。将井群孔降水与倾斜排水的排水效率相结合,引入排水拦截比λ,给出排水拦截比与排水孔水平间距之间的关系,可以得到不同排水孔布设间距对虹吸排水效果的影响。在实际计算中可以根据工程要求确定拦截比,并求出相应的井孔间距,为实际工程的设计提供相关依据。通过物理模拟试验探究排水孔在地下水位以下部分孔长对排水效果的影响,表明地下水位以下部分孔长与排水拦截比呈线性关系。
Siphon drainage is a kind of effective measure which can eliminate the deep groundwater in slope body without any dynamic force and can significantly reduce the water table and enhance the stability of the slope to a great extent by reasonably arranging the siphon drainage hole group. Combining the well group hole precipitation with the drainage drainage efficiency, the drainage interception ratio λ is introduced to give the relationship between the drainage interception ratio and horizontal spacing of drainage holes, and the effect of different drainage holes layout spacing on the siphon drainage effect can be obtained. In the actual calculation, the interception ratio can be determined according to the engineering requirements and the corresponding hole spacing can be calculated, which provides the basis for the design of the actual project. Through the physical simulation test, the effect of drainage hole length below the groundwater table on the drainage effect was explored, indicating that the hole length below the groundwater level has a linear relationship with the drainage interception ratio.