食水坑地滑地之邊坡滑動機制探討

Study on the Mechanism of Slope Sliding in Sushakn Landslide Area

謝豪榮(Haw-Long Shaie) ； 許中立(Chung-Li Hsu) ； 詹連昌(Lan-Chan Jung) ； 張世松(Su-Son Chang) ； 張尚卿(San-Chin Chang)

《坡地防災學報》 6卷1期 (2007/06) Pp. 31-42

https://doi.org/10.29995/JSHR.200706.0003

摘要

台灣的山坡地近年來每遇颱風豪雨之侵襲就有土砂災害的發生，如何在最短的時間內進行專業的調查對已經釀災或可能產生二次災害地區實施適當的緊急整治評估，為當前坡地防災與水土保持工作者的主要任務之一。卓蘭鎮上新里食水坑地區之山坡地，因受2006年的0609豪雨影響，發生大規模之地層滑動，導致房屋受損16戶，民眾財產損失嚴重，地滑地正下方之苗55線道路被滑動之土體覆蓋，道路中斷交通受阻。本文之主要目的即為集合坡地防災專家，組織一專案團隊進行現場踏勘把脈問診工作，期望能對本案能提出較佳的處理方案建議。調查發現本地區之地層滑動除受到豪雨入滲造成地下水位升高之影響外，應與區域地質特性及921地震造成該地區之地面開裂錯移有關，未來整治上應以整地排水、裂縫填補及擋土設施的方式規劃較宜。

關鍵字

地滑 ； 食水坑 ； 豪雨 ； 調查 ； 緊急整治

並列摘要

Recently, hillside in Taiwan have many sediment disasters whenever invasion typhoon and torrential rainfall attacked, how to carry on the specialized investigation to already making the disaster or may have produced the disaster area two times and implemented proper urgent control works to assess within shortest time, prevented natural hillside disaster was one of the soil and water conservation worker's main tasks for the present hillside fields. The hillside of Sushakn area in Jolun village is influenced by 0609 torrential rainfall in 2006, the landslide happens cause damaged 16 houses, the people are serious in property loss, shoot Line 55 road under the landslide area is covered with by the sliding stratum body, the road cuts off the traffic and is obstructed. The main purpose of this paper namely whether collect the expert of hillside disaster prevention immediately and organize special project group to make field survey and investigation, can propose optimization treatment scheme suggestion on this case. Investigated result shows that the stratum in this area sliding were influence causing except by the water table rising and torrential rainfall, should cause by ground surface erosion and fault movement with local geological characteristic and 921 earthquake. It should be better relatively plan to renovated in land preparation, draining surface runoff, filling and blocking on ground crack and setting retaining wall in the future.

並列關鍵字

Landslide ； Sushakn area ； Torrential rainfall ； Investigation ； Urgent control work