颱風豪雨驅動坡地變位門檻值之制定與防災應變系統整合之研究
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摘要
本研究以華梵校區坡地作為主要研究區域,華梵海拔550公尺,校區設置多種監測儀器。首先根據傾斜觀測管歷年位移滑動資料,並結合颱風之雨量資料,歸納出坡地潛在滑動安全之雨量警戒值。研究中從不同觀點切入,以數值模擬與機率以及迴歸演算方式比較分析歷年雨量與變位資料,整理出雨量警戒門檻值,其結果顯示彼此大致吻合。而後再依據自動水位量測資料,整理出地下水位與雨量之間的關係,其結果顯示若能減少地下水位高度則能減少變位量的產生。為此本校於今年設置兩口集水井,以期望能減緩地下水位造成之坡地變位,在整治的過程中亦使用SAA即時量測位移量,以監測在集水井施作中所產生之位移,並將其作為坡地防災與維護管理之參考依據。此外,本研究亦建構雲端儲存與運算及自動傳輸監測網與防災應變系統,期望能達到及時防災應變之目的,進而減少災害發生。
As a case study area,the slope within the Huafan University campus with an altitude about 550 m above sea level has been studied by means of various monitoring methods.First,rainfall warning values for the slope with creeping phenomena are concluded from the data over years of sliding recorded by inclinometers combined with those of precipitation induced by typhoons.In this study,by numerical modeling and regression calculation to analyze the data of rainfall and displacement over years,the resulting rainfall warning threshold values are primarily consistent with those mentioned above.Furthermore,relationships between rainfall and groundwater table are revealed according to data of self-recording water level gages.The results show that the displacement can decrease when the groundwater table lowers.Accordingly,two catchpits were established within the campus to diminish the slope displacement induced by the rising of the groundwater table.During the remediations,the Shape Accel Array(SAA) is applied to measure the real- time displacement as well to monitor the displacement resulting from the catchpit constructions,which will be taken into consideration for disaster prevention and maintaining management of slopes.In addition,online storage calculation as well as systems of automatic monitoring and transmitting,and disaster prevention and response will be established to achieve the purposes of prevention and response of disasters and further to reduce occurrence of disasters.
引文
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