岩溶隧道涌水对降雨的响应特征

Research on the response feature of tunnel inflow to precipitation in a karstic area

引入时间序列分析方法,以铜锣山岩溶长大隧道为例,采用相关分析和频谱分析,定量研究了该隧道涌水对降雨的响应特征。结果表明,隧址区岩溶地下水系统储量十分丰富,具有很强的调节能力和过滤作用,致使隧道涌水与降雨的相关程度不高,平均滞后时间长达12.62 d,由此推断,隧道涌水与降雨之间的连通性较差。此研究成果可为隧道后期的防排水管理提供科学依据。

Introducing time series analyses method, this paper takes Tongluoshan long tunnel, constructed in a karstic area, as an example, quantifying its response characteristics to the precipitation by adopting correlation and spectral analysis. Results of this research indicate that the groundwater system has huge storage capacity in the tunnel region with strong regulation and filtering ability, which results in low correlation found between the tunnel inflow and precipitation but with a lag about 12.62 d, concluding that the connectivity between precipitation and tunnel inflow is very weak. These results can offer scientific basis to the prevention and drainage of tunnel inflow.