日本山区隧道建设技术代表团不久前访华,与我国隧道学会举行了座谈,并介绍了日本铁路山区隧道的建设概况及建设技术上的某些特点。日本是岛国,境内多山,山地及高原约占全国总面积80%。随着铁路建设的发展,特别是新干线的兴建,铁路隧道所占比重逐年增加。到1976年止运营隧道长度共1,811公里,占运营线路总长(21,276公里)的8.5%。其发展情况列表如下。 The Japanese mountain tunnel construction technical delegation recently visited China and held talks with China’s Tunnel Society and introduced the general situation of the construction of the Japanese railway mountain tunnel and certain technical features of the construction. Japan is an island nation, with mountainous regions, mountains and plateaus covering about 80% of the country’s total area. With the development of railway construction, especially the construction of the Shinkansen, the proportion of railway tunnels has been increasing year by year. By 1976, the total length of tunnels operated was 1,811 kilometers, accounting for 8.5% of the total length of the operation routes (21,276 kilometers). The development of the list below.