物理模型應用於逆向坡變形與崩壞過程與崩壞之初步研究

林建杰 ； 羅佳明

《土木水利》 43卷2期 (2016/04) Pp. 5-10

https://doi.org/10.6653/MoCICHE.201604_43(2).0002

摘要

本研究主要以臺灣武嶺至石門山一帶為研究區，探討逆向坡岩體變形與崩壞過程。藉由現場調查與物理模型說明逆向坡不同條件下之重力變形特性，並推估逆向坡變形過程與破壞特性。研究結果得知，坡趾切除透空為逆向坡傾倒變形之關鍵，其將造成岩體材料強度弱化加速發生變形。當坡趾切除透空越嚴重時，逆向坡崖頂將先產生張裂縫，導致坡體加速變形與滑動面發展，最終發生整體翻倒破壞。而變形範圍內具有相當多張裂縫與破裂面發展，其將有助於地表水與地下水滲入，促使逆向坡變形區加速崩壞。

並列摘要

This study investigated the deformation and failure process of anaclinal slopes from Wuling to MT. Shimen Trail in Taiwan. Field investigation and physical modeling were used to explain the gravitational deformation characteristics of cataclinal slopes under various conditions and derive the deformation process and failure characteristics. Our results show that the slope toe daylight mechanisms crucial to the process of deformation in anaclinal slopes as well as the weakening of rock material and the acceleration of deformation. While anaclinal slope toe daylight more serious, we also found that deformation and crack development initially began in the top of the slope, which resulted the acceleration of deformation and the development of rupture surface. Finally, its will occur toppling failure. The deformation zone presented significant cracking and rupture surface, which facilitated the infiltration of surface water and groundwater, thereby accelerating the process of deformation leading ultimately to failure.