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前言我段在站场排水系统中多年来都是按照通用图修建股道之间的排水沟,这种我们称之为“碴顶式”排水沟(见图1)。由于它在路基面以下不设排水孔,路基面以上的泄水孔孔径
Foreword I paragraph in the station drainage system for many years in accordance with the general plan to build drainage between the strands, which we call “ballast top” drainage (see Figure 1). Because it has no drainage hole below the subgrade surface, the drainage hole diameter above the subgrade surface