降雨誘發山崩之區域安全性評估

本研究區域內有台14線埔霧公路，埔霧公路為仁愛鄉對外主要道路，更是中部橫貫公路主要之線，來往花蓮及中部重要路段。不過此路段卻常因為颱風、豪雨、地震等等天然災害造成道路中斷以及人員傷亡，因此若能在以豪雨來時，對區域進行安全性評估，不但能提供整治工作優先順序，更能有效地域防甚至預測災害的發生，以達到防災減災的目的。所以如何以合理有效地進行大區域的山崩潛感分析是本研究主要的課題。本文選擇2008年辛樂克颱風為分析事件，利用大範圍邊坡分析軟體TRIGRS，並進參數分析，在進行大範圍山崩潛感分析。在本研究中假設每個網格均為獨立，以不同網格滑動深度、地下水位、雨量進行分析。並進行單一網格參數分析其結果顯示，坡度、滑動深度、凝聚力均會對TRIGRS有較大之影響。因此如何合理的選擇所需要之參數，為一重要課題。

關鍵字

TRIGRS ；山崩；降雨；邊坡穩定分析

並列摘要

In this research region has the Taiwan 14 Guangdong fog road, the Guangdong fog road for the Renai Town foreign main road, is middle the Hengguangonglu main line, communicates Hualian and middle the important road section. However this road section actually because often the typhoon, the torrential rain, the earthquake and so on natural disaster creates the path interrupt as well as the personnel casualty, if can therefore when comes by the torrential rain, carries on the secure appraisal to the region, not can only provide the improvement work order of priority, can the effective region against even forecast that disaster's occurrence, serves the purpose which the disaster prevention reduces disaster. How therefore by carries on the wide range the landslide to dive the feeling analysis is this research main topic effectively reasonably. This article chooses in 2008 Xin Leke the typhoon is the analysis event, uses wide range side slope analysis software TRIGRS, advances together the parametric analysis, is carrying on the wide range landslide to dive the feeling analysis. In this research supposition each grid is independent, by the different grid glide depth, the subsoil water level, the rainfall carries on the analysis. And carries on the sole mesh parameter to analyze its result to demonstrate that the slope, the glide depth, the cohesive force will have the tremendous influence to TRIGRS. Therefore how does the reasonable choice need the parameter, is an important topic.