A Study of Wu-Wan-Tsai Landslide, Taiwan Highway No18

• Main Authors: Tsung-Cheng Tsai, 蔡宗成
• Other Authors: Ching-Chuan Huang
• Format: Others
• Language: zh-TW
• Published: 2006
• Online Access: http://ndltd.ncl.edu.tw/handle/88845517125400547684

碩士 === 國立成功大學 === 土木工程學系專班 === 94 === 　28K+900~31K+500 landslide section of Taiwan Highway No18, Since 1982 opened to vehicular traffic, the road surface occur continued settlement and displacement. Even though repeatedly to repair and reinforce, but couldn’t effective improve. Landslide happened in 6/26/1982, there was about 150-meter roadbed been destroyed at the location of 31k+500.After rush to repair, now made a detour on the top of landslide to keep the road in common use. 　The study is to understand the mechanism of landslide and to look for the way to deal with the situation. Study method was survey rainfall、groundwater level and ground surface displacement and match up ground surface investigation 、geological survey and geophysical exploration. Base on the data of survey to analyze the relationship each other. Find rainfall and permeate of groundwater to result in the rise of groundwater level is main reason of the landslide mechanism, and then source erosion of the Nan Tu Tao river is one of the reason that occur the slide section roadbed to collapse. 　Short-term tragedy is to restrain the source erosion and match up improve original erosion ditch, firm toe of slope, collect ground surface runoff lead to Nan Too Tao river, and let the turn round bend of 30k+100 to advance of time turn round. Long-term tragedy need to study the local groundwater、groundwater flow direction and supply source, then set up effective horizontal drain、drainage well or drainage tunnel at corrective location, that can effective restrain landslide and increase stability of slope road along the line。