[1]曹艳妮.溶岩与非溶岩地区隧道排水系统堵塞机理[J].高速铁路技术,2023,14(04):35-39.[doi:10.12098/j.issn.1674-8247.2023.04.007]
　CAO Yanni.Blockage Mechanism of Tunnel Drainage System in Karst and Non-karst Areas[J].HIGH SPEED RAILWAY TECHNOLOGY,2023,14(04):35-39.[doi:10.12098/j.issn.1674-8247.2023.04.007]
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溶岩与非溶岩地区隧道排水系统堵塞机理()
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《高速铁路技术》[ISSN:1674-8247/CN:51-1730/U]

卷:
14卷
期数:
2023年04期
页码:
35-39
栏目:
出版日期:
2023-08-30

文章信息/Info

Title:
Blockage Mechanism of Tunnel Drainage System in Karst and Non-karst Areas
文章编号:
1674-8247（2023）04-0035-05
作者:
曹艳妮
中国邮政集团有限公司西安市分公司，西安 710068
Author(s):
CAO Yanni
Xi’an Branch of China Post Group Corporation ，Xi’an? 710068 ，China
关键词:
溶岩与非溶岩地区; 隧道排水系统堵塞; 碳酸钙溶解; 土颗粒迁移
Keywords:
karst and non-karst areas; tunnel drainage system blockage; calcium carbonate dissolution; soil particle migration
分类号:
U453.6
DOI:
10.12098/j.issn.1674-8247.2023.04.007
文献标志码:
A
摘要:
岩溶与非岩溶地区隧道排水系统频繁发生堵塞灾害。溶岩地区排水系统堵塞物质主要为白色碳酸钙（CaCO3），而非溶岩地区排水系统堵塞物质为黑色土颗粒。以法国Meyssiez隧道排水系统堵塞灾害为依托，通过测试隧道围岩孔隙比e和地下水电导率EC，分析了岩溶地区隧道排水系统的堵塞机理。试验结果表明：（1）溶岩地区排水系统堵塞主要由以下过程引起：①雨水入渗地下后，溶解了围岩内部的碳酸钙，形成Ca2+和HCO3-离子；②含有Ca2+和HCO3-离子的地下水通过排水孔流入隧道内部的排水系统。由于气温和气压等外部因素改变，Ca2+和HCO3-离子反向沉积形成固态CaCO3结晶，最终引发排水系统堵塞；（2）非溶岩地区隧道排水系统堵塞灾害由以下过程引起：①地下水流作用引发围岩内部细小土颗粒迁移流失；②流失的细小土颗粒通过排水孔进入隧道内部排水系统，而后逐步堆积，最终引发排水系统堵塞。
Abstract:
Tunnel drainage systems in karst and non-karst areas are frequently blocked. The plugging material of the drainage system in the karst area is mainly white calcium carbonate （CaCO3），while that in the non-karst area are black soil particles. Based on the engineering disaster of drainage system blockage in the Meyssiez Tunnel in France，this paper analyzed the blocking mechanism of tunnel drainage system in karst areas by testing the void ratio of surrounding rock and the electrical conductivity groundwater. The test results indicate that：（1）the blockage of the drainage system in the karst area is mainly caused by two processes：① after rainwater infiltrates underground，calcium carbonate inside the surrounding rock is dissolved to form Ca2+ and HCO3- ions；② groundwater containing Ca2+ and HCO3- ions flows into the drainage system inside the tunnel through drainage holes. Due to the change of external factors such as air temperature and pressure，Ca2+ and HCO3- ions are reversely deposited to form solid CaCO3 crystals，which eventually cause blockage of the drainage system. （2）The blocking disaster of the tunnel drainage system in non-karst areas is caused by the following processes：① migration and loss of fine soil particles inside surrounding rocks due to groundwater flow；② the lost fine soil particles enter the internal drainage system of the tunnel through drainage holes，then gradually accumulate，and finally cause the blockage of the drainage system.

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期：2022-05-21
作者简介：曹艳妮（1993-），女，工程师。
更新日期/Last Update: 2023-08-30