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一、概述阳安铁路是我国重要的电气化铁路干线之一。它西起阳平关,东至安康,全长356.8km,1972年10月通车运营。它北依秦岭,南邻米仓山、大巴山,线路走向基本上为东西方向。该铁路所通过的陕南地区属亚热带湿润气候,年降雨量一般为900mm左右,最大年降雨量为1360mm,年平均蒸发量为1200mm左右,四季分明,平均气温为14℃。铁路部分穿越嘉陵江、汉江峡谷,山陡谷深,出露的岩石分别为绿泥片岩、千枚岩、石灰岩、各类板岩、变质砂岩、花岗岩等,大部分为变质岩;部分由西往东依次通过汉中盆地、西乡盆地和月河盆地,而在这些盆地及边缘地区分布着裂土以及砂砾土等。全线路基总长度为266.5km,其中裂土路基长度为162.4km,占全线路基总长度的60.9％。
I. Overview Yang’an Railway is one of the important electrified railway lines in China. It west from Yang Pingguan, east well-being, a total length of 356.8km, opened in October 1972 operation. It north of Qinling Mountains, south of rice Cangshan, Daba Mountain, the line is basically the direction of the east-west. The southern part of Shaanxi Province, through which the railway passes, is a subtropical humid climate. The annual rainfall is generally about 900 mm, the annual rainfall is 1360 mm, and the annual average evaporation is about 1200 mm. The four seasons are distinct with an average temperature of 14 ° C. Part of the railway crossing the Jialing River, Han River Canyon, deep steep valleys, exposed rocks are green mud schist, phyllite, limestone, all kinds of slate, metamorphic sandstone, granite, mostly metamorphic rocks; part of the west East successively passes through the Hanzhong Basin, Xixiang Basin and the Yuehe Basin, and in these basins and marginal areas, there are rift and gravelly soil. The total length of the entire subgrade is 266.5km, of which the length of the subgrade is 162.4km, accounting for 60.9% of the total length of the subgrade.