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铁路路基是轨道的基础,是铁路线路的重要组成部分,它直接承受着轨道及列车荷载的作用,因此路基必须具有足够的强度和稳定性,以保证列车按规定的速度安全、平稳地行驶。1 淮南线路基概况及病害产生原因淮南线经由江谁冲积平原,该平原广泛分布有第四系上更新统、中下更新统粘土,具有膨胀土(裂土)性质。膨胀土的特性主要表现为:第一、胀缩性,即干旱时土块收缩,土体膨胀。雨天遇水土块吸水,土体膨胀;第二、崩
Railway embankment is the basis of track and is an important part of railway line. It is directly bearing the load of track and train. Therefore, the embankment must have sufficient strength and stability to ensure that the train runs safely and smoothly at the required speed. 1 Overview of Huainan Subgrade and Cause of Disease The Huainan line passes through the Jiang who alluvial plain. There are widespread Quaternary Pleistocene, Middle-Lower Pleistocene clays, and expansive soil (rift) properties. The characteristics of expansive soil mainly as follows: First, expansion and contraction, that is, when soil cakes shrink, soil expansion. In rainy days water blocks absorb water, soil expansion; second, collapse