HR: 0800h
AN: NS31B-0380    [Abstracts]
TI: Application of resistivity image profiling method and laser scanning to monitor landside
AU: * Liu, H
EM: ps310486@ms18.hinet.net
AF: Hsing-Chang Liu, 229,Chien-Hsin Rd., Jung-Li, 320, Taiwan
AU: Yang, C
EM: yang@cyu.edu.tw
AF: Hsing-Chang Liu, 229,Chien-Hsin Rd., Jung-Li, 320, Taiwan
AB: Taiwan, located at the Western Pacific, bears the threats from both typhoons and earthquakes. The 921 earthquake resulted in the unstable ground so that typhoons or torrential rain could cause serious disasters. Currently, the hazard mitigation is the target of the authorities. However, using the traditional approaches not only wastes a lot of time but also is ineffectively. The deformation of slope terrain is detected by physical measured instrument traditionally. Collecting deformation data of tiltmeter and piezometer inner well drilling. A few of wells are limited by terrain and cost. The wells can not cover all landslide area. The results of analysis data are debated. The collapse slope once has more probabilistic collapse. Particularly designing engineering against natural calamities with debated conclusion and the rebuilt slope will be instable. This paper demonstrates the possibility of using resistivity image profiling method (RIP) and 3d laser scanning to monitor a landside at No.3 freeway of 85 km in Taiwan. The slope was rebuilt by grid-beam engineering, spraying concrete engineering and cut-slope engineering. The first, exploring underground substance by resistivity image profiling method . To obtain the destructive sliding position of slope, the range of slope with the same sliding position and groundwater data. Time-lapse RIP sections for different time period also indicate that the obvious resistivity change zones were limited under a strongest topography change surface.Fitting 3d laser scanner on suitable site for scanning research target. To analyze overlay scanning data by correcting the cloud-points with the different periods. The study utilizes the 3d scanning technology and geoelectric resistivity technology to obtain analysis information of slope probability and terrain deformation trend. The way of detecting deformation of rebuilt slope that combines RIP and 3D laser scanner is overall technology. The RIP detects the sensitive area of underground and the 3D laser scanner detects terrain surface of slope. Especial collecting the data by period observation. The data can provide the trend of rebuilt slope creeping and the policy decision of remaking engineering. KeywordĄGresistivity image profiling ,3d laser scanning,landslide
DE: 1810 Debris flow and landslides
SC: Near-Surface Geophysics [NS]
MN: 2007 Fall Meeting