滇西怒江河谷潞江段岩溶发育特征及其对工程的影响
Karst development along Lujiang segment of the Nujiang (Salween) River in western Yunnan Province and its potential influence on the railway project
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摘要: 通过对泛亚铁路大理-瑞丽线中段马厂、道街坝1∶5万图幅的地质灾害详细勘查和室内研究，分析总结了研究区岩溶地貌的形成机制和发育规律。结果发现，研究区内不仅发育有地表岩溶漏斗，而且分布着规模较大的地下岩溶洞穴，复杂的地质构造、可溶性的碳酸盐岩、湿热的气候条件和丰富的降水是该区岩溶地貌发育的主要因素。研究结果表明，研究区内的地下岩溶作用可能给铁路隧道工程的施工带来不可忽视的潜在危害，同时综合区域地质条件对比发现，大理-瑞丽铁路沿线的其它地段也同样具有存在类似的岩溶发育条件。因此，在铁路施工前进一步加强沿线区域地下岩溶作用的工程影响评价，对于有效地减少相关的工程危害性十分重要。Abstract: This paper analyzed and summarized karst formation mechanism and growth regularity on the basis of detailed investigation and indoor study of geological disasters of he Dali-Ruili railway in Machang and Daojieba Sheet. The complex geological structures, soluble carbonate, hot and humid weather and abundant precipitation all provide favorable conditions for the development of karst landform. There are surface karst funnel and large underground karst caves in the study area, and they will bring great harmfulness to railway and railway tunnel. Since many sections have karst development conditions, it is necessary to carry out detailed karst investigation along railways.
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Key words:
- Dali-Ruili railway /
- western Yunnan Province /
- carbonatite /
- karst action /
- engineering geology
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