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一、概述襄樊分局管内焦柳铁路K478+000～K798+449于1970年四月建成通车,沿线大部分处于中弱性膨胀土地带。少数区段为强膨胀土。据资料显示,沿线路基土液限大鄙大于40%,最高达64.8%,自由膨胀率44～80%,胀缩总率多数大于0.7,最高达2.1。加之多雨的自然环境,路基翻浆冒泥随处可见,线路几何尺寸变化频繁,投入大量人力、物力进行整治,直接影响了运输安全和增大了经济成本。
I. Overview Xiangfan Branch Jiao-Liu Railway K478 +000 ~ K798 +449 opened to traffic in April 1970, along most of the weak in the expansive land zone. A few sections are strong expansive soil. According to statistics, along the roadbed soil liquid limit of more than 40%, up to 64.8%, the free expansion rate of 44 to 80%, the majority of expansion and contraction rate greater than 0.7, up to 2.1. Coupled with the rainy natural environment, the roadbed can be seen everywhere in the process of slurrying and slurrying. The frequent changes in the geometric dimensions of the line have put a lot of manpower and material resources into rectification and have a direct impact on the safety of transportation and the increase of economic costs.