順向坡地之地下水和位移，微觀監測與宏觀調查及整治成效

Groundwater and Displacement Microscopic monitoring and macroscopic investigation and remediation of a dip-slope landslide

本研究以華梵大學校區坡地作為主要研究區域，惟其範圍涵蓋至整體大崙山區域，為了永續經營發展，故在坡地內設置多種監測儀器，並持續監測坡地安全至今，本研究將該坡地之地表觀測點所量測之沉陷量及位移量與各監測資料分析比對，並著重考量因颱風降雨引致之水位變化行為，另本研究亦擴及校外整個大崙山之區域納入考量，將校內外之裂縫變位做一整理以及初步之UAV拍攝成果。本研究亦整理出地下水位與雨量之間的關係，並檢討本校新施作之兩口集水井施作後成效為何，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是否有產生多餘的位移量，並藉由歷年資料推論校區各滑動塊體之滑動速率，針對滑動速率較快之區域，先試行施作集水井之降排水工程，在井內上坡面方向設置輻射狀集水管，希望能有效降低地下水位減緩坡地變位。T1集水井施工完成後三個月，目前已獲知地下水位有明顯降低，相同累積雨量所驅動之位移量減小，以及降雨驅動位移的時間往後延遲等變化。

"The main study area of this research is the Huafan University campus within the Dalun Mountain area. For sustainable development of the campus, various devices have been set to monitor the slope. In this study, amount of settlement and displacement of the slope is analyzed and compared to the monitoring data. In addition, variation of the groundwater level owing to precipitation induced by typhoons is also considered. Not only the campus but also the Dalun Mountain area are taken into consideration, where surficial cracks are surveyed and aerial photos derived from UAV (unmanned aerial vehicle) are also acquired. Relationship between groundwater and rainfall is also concluded, and then to discuss the effectiveness of the catchpit. SAA (ShapeAccelArray) are applied to monitor extra slope displacement during the construction of the wells. Sliding rates of each sliding mass inferred are derived from the monitoring data over years. In the area where the sliding rate is high, radial collector wells are constructed in the upslope to drain and lower the groundwater, and further to diminish the slope displacement. Three months after the catchpit T1 was set, the groundwater level has lowered significantly. More complete variation of the groundwater level can be observed when the rain season comes."