八姑阿莫隧道地下水环境影响预测

Study on Groundwater Environmental Impact of Jiupansi Tunnel

以穿越西昌至香格里拉高速公路八姑阿莫隧道为例,在工程地质勘察基础上,研究地下水流动类型,分析地下水排泄补给方式,计算地表径流流、地下汇流量以及施工引发的涌水量,最终计算得到隧道施工期最大涌水量为9756m3/d,正常涌水量为6504m3/d,地下水降位漏斗最大影响半径880m。从对地下水及生态环境影响的角度,在加强超前预测的情况下,目前修建隧道是合理的、可行的,不会产生较大的地下水环境问题,对附近居民及上部生态的影响较小。

Takingbaguamo Tunnelcrossing Xichang-Shangri-la expresswayasan example,based on engineering geological investigation, groundwater flow typesare studied, groundwater dischargeand recharge modesareanalyzed,and surface runoff, undergroundconfluenceand water inflowcausedbyconstruction arecalculated. Finally, the maximum water inflow during tunnelconstruction iscalculated tobe 97.56 m3/d, 6 504 m 3/d of normal water inflow, 880 m of maximum influence radius of groundwater depression funnel. From the point of view of groundwaterand ecological environment impact, it is reasonableand feasible toconstruct tunnels under the condition of strengtheningadvance prediction, which will not cause larger groundwater environmental problemsand have less impact on nearby residentsand upper ecology.