Preliminary Study of the Uncertainty Evaluation of Rockfall

• Main Authors: Chuang, Shih-Hong, 莊士弘
• Other Authors: Pan, Yii-Wen
• Format: Others
• Language: zh-TW
• Published: 1998
• Online Access: http://ndltd.ncl.edu.tw/handle/48767564732611193331

碩士 === 國立交通大學 === 土木工程研究所 === 86 === 　　Rock-fall often occurs along many highway slopes, especially during or after a large rainfall. The consequence of rock-fall may result in traffic interrupt, property damage, and serious personal injury. The hazard potential of rock-fall depends on several factors including geology, topography, and environmental conditions. Compared to other aspects of geotechnical engineering, the rock-fall problem has a higher degree of uncertainty. In the conventional approach, however, the factors determining the hazard potential of rock-fall are usually evaluated in a deterministic manner. It seems reasonable to take the probabilistic nature of the roch-fall problem into account. This thesis aims to investigate the aspeccts for determining the probability and statistics of rock-fall hazard. In addition to a discussion on the site investigation for evaluating rock-fall hazard, this study proposes an approach for using photo-analysis to collect data of discontinuities. The collected data is then used for obtaining the probability and statistics of discontinuities. Using the information, the probability and distribution of rock-fall size is studied by using the Monte-Carlo simulation. Moreover, the uncertainty and reliability of the hazard classification of rock-fall potential is elaborated.