摘要
川藏铁路雅安至林芝段全长近1000 km,具有生态环境脆弱、地质环境敏感的工程环境特征。通过遥感调查与监测的方式利用卫星影像对类比工程区工程建设前后的主要植被类型以及选取类比工程,探讨雅安-林芝段隧道工程施工产生的溶矿地下水及地热水涌出对周边生态环境的影响。结果表明,隧道工程穿越含矿段及地热带形成的溶矿水、地热水排放不仅影响工程项目建设,还会影响土壤、地下水、地表水中的生物生存,造成某些生物种群的减少。同时工程沿线分布的大量湿地,溶矿水、地热水改变其原有水质及水热条件,不仅容易使水体二次污染,还可能破坏湿地生态系统结构,降低植被生长速度。基于此,依据沿线热害隧道排放地下特点提出相应的处理措施建议,包括封堵、综合利用及处理排放等。
The section from Ya?an to Nyingchi of Sichuan-Tibet Railway is nearly 1000 km long and has the characteristics of fragile ecological environment and sensitive geological environment.By means of remote sensing investigation and monitoring,satellite images are used to study the main vegetation types before and after the construction of the analogue engineering area and the selection of the analogue engineering,and the influence of the gassing of ore-dissolved groundwater and geothermal water generated by the construction of tunnel in ya?an-Nyingchi section on the surrounding ecological environment is discussed.The results show that the drainage of dissolved mineral water and geothermal water through the ore bearing section and geotropic zone not only affects the construction of the project,but also affects the survival of organisms in soil,groundwater and surface water,resulting in the decrease of some species.At the same time,a large number of wetlands distributed along the project,mineral dissolved water,geothermal water change the original water quality and hydrothermal conditions,not only easy to cause secondary water pollution,but also may destroy the wetland ecosystem structure,reduce the growth rate of vegetation.Based on this,according to the characteristics of underground emission of heat hazard tunnels along the line,the corresponding treatment measures are proposed,including plugging,comprehensive utilization,treatment and emission.
作者
许模
李晓
李德良
宋词
赵亚茜
XU Mo;LI Xiao;LI De-liang;SONG Ci;ZHAO Ya-xi(State Key laboratory of Geohazard Prevention and Geoenvironment Protection,College of Environment and Civil Engineering,Chengdu University of Technology,Chengdu 610059,China;China Academy of Railway Sciences,Beijing 100080,China;Railway Eryuan Engineering Group Co.Ltd.,Chengdu 610031,China)
出处
《地质灾害与环境保护》
2021年第3期106-112,共7页
Journal of Geological Hazards and Environment Preservation
基金
川藏铁路施工排水高效处理方案与关键技术研究(K2020Z001)。
关键词
川藏铁路
生态环境
隧道
保护措施
Sichuan-Tibet railway
ecological environment
tunnel
safeguard procedures
