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察尔汉盐湖干滩地区岩盐岩溶演变和铁路路基基底稳定性的研究和长期监测表明,就路基基底现状而言,隐伏溶洞变化极其缓慢,岩盐地层具有足够的承载能力,以稳态蠕变的方式缓慢下沉,可以长期保持铁路主干线的稳定性。然而,盐湖卤水矿床的大规模开采以及其它人为因素的影响将可能加速溶洞的发展,威胁铁路的安全。建议采用基底的异常下沉速率和隐伏溶洞的危险洞顶盐厚,作为路基基底稳定性长期监测的两项安全指标。
The study of the rock salt karst evolution and the stability of the railway subgrade on the Chaerhan Salt Lake dryland area and long-term monitoring show that, in terms of the status of subgrade basement, the hidden caverns change extremely slowly, and the rock and salt strata have sufficient carrying capacity to achieve steady-state creep. The slow way to sink can maintain the stability of the main railway line for a long time. However, the large-scale exploitation of the salt lake brine deposit and other human factors may accelerate the development of caverns and threaten the safety of the railway. It is suggested to use the abnormal sinking rate of the basement and the salt thickness of the dangerous roof of the hidden caverns as the two safety indicators for the long-term monitoring of the stability of the roadbed basement.