A Study of Rockfall Disasters Prevention with Expendable Poly-styrene in Rock Shed

• Main Authors: Tzu-chi Liu, 劉資祺
• Other Authors: 林利國
• Format: Others
• Language: zh-TW
• Published: 2011
• Online Access: http://ndltd.ncl.edu.tw/handle/u8b45b

碩士 === 國立臺北科技大學 === 土木與防災研究所 === 99 === Hilly area of the entire island of Taiwan for two-thirds, with Taiwan is located in the Philippines, Europe and Asia at the junction of continental plates, earthquakes frequently. In addition, the average annual rainfall in Taiwan is about the world 2.6 times the average annual rainfall, but uneven distribution of rainfall, about 80% concentrated in the wet season from May to October period, so during heavy rain or typhoon season seismic events, often mountain rockfall caused disasters. Taiwan''s existing tunnel next to the main resisting force of the beam system, supplemented by energy dissipation materials to reduce the impact of falling rock in falling load. However, the current design of tunnel construction has not specified clearly, and on the top version of tilt is less than the impact energy dissipation and the mountainous area of road construction under limited circumstances, when falling rock group led out the tunnel roof fall impact or static load is too large, often caused the top version, the beam structure or the underlying system damage, serious impact on the important mountain roads reopened to the outside time. Expandable Poly-Styrene extracted from the system using the liquid oil in the styrene monomer, the coincidence of a solid polystyrene foam made of the mixed-type block. EPS foam in by the fusion block made of the production process such as physical products, this material is light weight, excellent cushioning, water resistance, self-reliance is good, excellent insulation and construction of simple rapid and other characteristics. Civil Engineering in Europe and the United States used to backfill the sand replacement material, it is called to Geofoam. The main purpose of this study was to investigate the EPS material applications in the next tunnel design advantages and disadvantages, and explore the EPS material subjected to various size and weight of the falling ball drop height with a variety of cases subjected to test the impact of the buffer material behavior, and thus confirm the EPS. Materials used in rockfall collision with the buffer requirements and other engineering application mode, supported by actual cases out of the tunnel EPS application, apply the EPS of the experimental data, to analyze how to achieve the best results EPS to work as domestic a reference design, hoping to promote the application of EPS in Taiwan.