基于GMS数值模型的隧洞施工对地下水环境影响预测研究

Based on GMS Numerical Model of Tunnel Construction on Groundwater Environment Impact Prediction Research

工程隧洞施工不仅可能存在因突涌水导致的安全隐患问题,而且还会在一定程度上破坏工程区地下水渗流场平衡,影响地下水的正常循环,存在影响或疏干地下水而导致的环境影响问题,处置不当还可能造成严重的环境影响及社会稳定问题。本文以滇中引水工程某深埋长隧洞为依托,采用GMS数值模型对不同施工工况下隧洞涌水量、地下水水位变化、主要泉点影响程度、运行期水位恢复情况等进行预测研究,为合理评价隧洞工程建设可能导致的地下水环境影响程度、研究制定渗控标准等提供合理、准确、可行的依据。

Tunnel construction is not only the safe potential risk that may be caused by sudden flood water problems,but also to a certain extent,destroy the existing groundwater seepage field balance,affect the normal cycle of the groundwater,influence or drainage of groundwater environmental impact caused by the problem,improper disposal can also cause serious problems of environmental impact and social stability.This paper,taking a deep water diversion project in Yunnan long tunnel as the backing,the GMS numerical model is adopted to different construction conditions influence radius of tunnel water inflow,water level changes of main stream points influence degree,operation period were used to predict the water level recovery,etc,for reasonable evaluation of tunnel engineering construction may lead to groundwater seepage control standards in the environmental impact,the research provides the basis of a reasonable,precise and feasible.