川东向阳岩溶隧道水化学特征及成因机制研究

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摘要 研究目的：涌突水是岩溶富水隧道的主要工程灾害,其研究具有重要现实意义。本文以向阳隧道为例,基于向阳隧道共计采集7个地表水样本和35个地下水样本开展水化学分析,研究西南岩溶山地深长隧道涌突水成因机制,为该线路岩溶隧道涌突水防治提供科学依据。
研究结论：(1)隧址区水体的水化学类型主要以HCO₃—Ca 为主,水质偏弱碱性,矿化度较低,地表水和地下水的化学性质相近,水力联系紧密;(2)水化学成分主要受硅酸盐岩和碳酸盐岩的风化溶解以及阳离子交换作用的影响;(3)地下水和地表水中Ca²⁺ 、Mg²⁺ 主要来源于岩溶地层中方解石和白云石矿物的溶解、碎屑砂岩中的长石矿物风化;(4)Na⁺来源于大气降水以及硅酸盐矿物的风化;(5)碳酸盐矿物在岩石风化溶解中占据主导地位;(6)本文相关研究成果可为岩溶地区隧道线路设计提供参考。

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	宋词
	杨锐锋
	谢詹
	余姝萍
	王圣阳
	张云辉
	裴向军
	刘建明
	代劲松
	曾庆华

关键词 ：岩溶隧道, 地下水, 水化学作用, 矿物风化溶解

Abstract：Research purposes: Water inrush is a major engineering hazard in karst water-rich tunnels, and its research is of great practical significance. Based on a total of 7 surface water samples and 35 groundwater samples, collected from Xiangyang Tunnel for hydrochemical analysis, this study takes Xiangyang Tunnel as an example to investigate the mechanism of water inrush in deep and long tunnels in karst mountainous areas in Southwest China and provides a scientific basis for the prevention and control of water inrush in karst tunnels along this route.
Research conclusions: (1) The hydrochemical types of water samples in the tunnel area are mainly HCO₃-Ca, with weak alkaline and low mineralization. The chemical properties of surface water and groundwater are similar, and the hydraulic connection is close. (2) The hydrochemical composition is mainly affected by the weathering and dissolution of silicate and carbonate rocks, as well as cation exchange. (3) The Ca²⁺ and Mg²⁺ in groundwater and surface water mainly come from the dissolution of calcite and dolomite in limestone dolomite, and the weathering of feldspar minerals in clastic sandstone. (4) Na⁺ comes from atmospheric precipitation and the weathering of silicates. (5) Carbonate minerals plays a dominant role in rock weathering and dissolution. (6) The research results can provide reference for the design of tunnel lines in karst areas.

Key words： karst tunnel ground water hydrochemical process mineral weathering and dissolution

收稿日期: 2024-07-26

PACS:

P641.3

基金资助:中铁二院生态环境设计研究院引导课题（KDNQ233029）; 地质灾害防治与地质环境保护国家重点实验室开放基金项目 (SKLGP2022K017)

作者简介: ** 宋词,1990年出生,女,高级工程师。

引用本文:

宋词, 杨锐锋, 谢詹, 余姝萍, 王圣阳, 张云辉, 裴向军, 刘建明, 代劲松, 曾庆华. 川东向阳岩溶隧道水化学特征及成因机制研究[J]. 铁道工程学报, 2024, 41(10): 44-51.
SONG Ci, YANG Ruifeng, XIE Zhan, YU Shuping, WANG Shengyang, ZHANG Yunhui, PEI Xiangjun, LIU Jianming, DAI Jinsong, ZENG Qinghua. Hydrochemical Appraisal and Formation Mechanism of Xiangyang Karst Tunnels in Eastern Sichuan Province. Journal of Railway Engineering Society, 2024, 41(10): 44-51.

链接本文:

https://tdgcxb.crec.cn/CN/ 或 https://tdgcxb.crec.cn/CN/Y2024/V41/I10/44

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