衡阳市合江套湘江隧道水文地质评述及环境影响分析

Hydrogeology Review and Environmental Impact Analysis for the Tunnel of Hejiang-Xiangjiang in Hengyang

在近年来江底隧道的大规模建设过程中,探明场地内的水文地质情况和进行环境影响评估始终是前期勘察工作的重点。合江套湘江隧道是衡阳市二环东路的控制性工程,水位高、岩溶发育、河流交汇等不利条件为工程施工提出了技术高要求。文章从地形地貌、气象特征、水文特征、河流特征、地层岩性、不良地质等方面进行水文地质评述,从河段河床、周围建筑物、弃土排放、诱发灾害等方面进行环境影响分析,最终提出合理化建议。研究成果不仅可以直接运用于合江套湘江隧道,也可为类似工程提供参考。

In recent years,in the process of large-scale construction of the fiver tunnel,it is always the focus of the preliminary in- vestigation to find out the hydrogeological conditions in the site and carry out environmental impact assessment.Hejiang- Xiangjiang Tunnel is a control project of the East Second Ring Road in Hengyang City.The high water level,the development of karst and the confluence of fivers put forward high technical requirements for the project construction.This paper reviewed the hydrogeology from the aspects of topography,meteorology,hydrology,fiver, stratum lithology and bad geology,and analyzed the environmental impact of river bed, surrounding buildings,discharging of waste soil and induced disasters,and finally put forward reasonable suggestions.The research results can not only be applied directly to this tunnel,but also provide a reference for similar projects.