某高铁隧道岩溶水文地质特征及施工病害分析  

Karst Hydrogeological Characteristics and Construction Disease Analysis of a High-speed Railway Tunnel

作　　者：付开隆[1] 周羽 韦正雄 王志军 FU Kailong;ZHOU Yu;WEI Zhengxiong;WANG Zhijun(China Railway Eryuan Engineering Group Co.Ltd,Chengdu,Sichuan 610031,China)

机构地区：[1]中铁二院工程集团有限责任公司,成都610031

出　　处：《铁道工程学报》2023年第10期86-92,共7页Journal of Railway Engineering Society

摘　　要：研究目的:贵南高铁朝阳隧道穿过区域性的水利背斜构造,可溶岩分布于背斜两翼,洞身位于岩溶水水平循环带。隧道施工过程中,可溶岩段发生较大规模的涌水涌泥现象,并伴随出现泉水漏失、地面塌陷等环境地质问题。隧道掘进的风险评估、岩溶水及泥砂的引排工程设计、环境保护设计,都需要在分析涌水涌泥、泉水漏失及地面塌陷的相关性的基础上进行岩溶水文地质条件综合评价。研究结论:(1)隧道内的涌水涌泥均发生于岩溶水主通道附近,涌水涌泥规模与降雨量密切相关;(2)隧道施工排水完全截断了隧道进口端立新水库和出口端鱼胆水库的补给水源,造成水库干涸;(3)隧道施工排水部分截断了进口端鱼村大泉补给水源,造成泉水减流;(4)岩溶地面塌陷发生于隧道涌水水源补给区(洞丢村)岩溶谷地内,洞身开挖排水降低地下水位导致地面塌陷集中产生;(5)本研究成果对岩溶发育区隧道工程勘察具有指导意义。Research purposes:The Chaoyang Tunnel of Guiyang-Nanning High-speed Railway passes through the regional hydraulic anticline structure.Soluble rocks are found on both sides of the anticline,and the body of the tunnel is located in the karst water horizontal circulation zone.In the process of tunnel construction,the phenomenon of water gushing and mud gushing occurred on a large scale in the soluble rock section,accompanied by environmental geological problems such as spring leakage and ground collapse.The risk assessment of tunnel excavation,the engineering design of drainage of karst water and mud sand,and the design of environmental protection,all need to analyze the correlation between water and mud gushing,spring leakage and ground collapse,and carry out comprehensive evaluation of karst hydrogeological conditions.Research conclusions:(1)Water and mud gushing in the tunnel occurred near the main groundwater channel,and the size of water and mud gushing was obviously correlated with rainfall.(2)The drainage of the tunnel completely cut off the supply water source of Lixin Reservoir at the entrance of the tunnel and Yudan Reservoir at the exit of the tunnel,causing the two reservoirs to dry up.(3)The drainage of the tunnel partially cut off the Yucun spring supply water,resulting in reduction of spring flow.(4)The karst ground collapse occurred in the karst valley(Dongdiu Village)of the recharge area of the tunnel's water source.The excavation and drainage of the tunnel led to the concentrated occurrence of the ground collapse.(5)The research results have guiding significance for tunnel engineering investigation in karst area.

关 键 词：朝阳隧道 涌水涌泥 泉水漏失 地面塌陷 

分 类 号：P64[天文地球—地质矿产勘探]