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1 概述 京广线韶关站位于南岭山系中段的南麓,为低缓丘陵地形和沿河阶地,穿越剥蚀残丘及丘间洼地。路基土主要为紫红、黄棕、灰白等颜色粘土,裂隙比较发育,呈可塑至半坚硬状,土的塑性指数为21.7～25.5,自由膨胀率为47％～51％,粘粒含量50.7％。属弱膨胀土。 韶关属亚热带型气候,雨量充沛,年降雨量为1500～1800mm,年蒸发量为1000～1100mm,降雨量大于蒸发量,因此,土的湿度较大,风化淋滤作用明显。
1 Overview Beijing-Guangzhou line Shaoguan station is located in the southern slope of the middle of the Nanling Mountains, low hilly terrain and riverside terraces, erosion through the denuded hills and mound depression. Subgrade soils are mainly purple, yellow-brown, gray and other colored clays with relatively developed fractures. They are plastic to semi-hard and have a plastic index of 21.7 to 25.5, a free expansion of 47% to 51% and a clay content of 50.7%. Is a weak expansive soil. Shaoguan subtropical climate, abundant rainfall, the annual rainfall of 1500 ~ 1800mm, the annual evaporation of 1000 ~ 1100mm, rainfall greater than the evaporation, therefore, the greater the humidity of the soil, weathering and leaching obvious.