以干砌片石来防护流水对路基、水沟、河床、河岸的冲刷是一种传統的做法,每年消耗的工料极为可观,与鉄路运輸安全的关系亦很大。对各种砌石的允許流速,自1954年以来采用了苏联《鉄路永久性水工建筑物水流容許流速暫行标准》。干砌片石是一种簡单的結构物,过去在設計上都是按标准套用,未予深究 To dry the masonry stone to protect the water on the roadbed, ditch, riverbed, bank erosion is a traditional practice, the annual consumption of materials is extremely impressive, and Kushiro transport security is also a great relationship. Permissible flow rates for various types of masonry, Soviet Union “Interim Standards for permissible flow rates for permanent hydraulic structures in Kushu Road” have been adopted since 1954. Dry masonry stone is a simple structure, the design in the past are applied according to the standard, not to study