Please use this identifier to cite or link to this item:
標題: 結合鑽探與地球物理方法調查八寶寮崩塌地之水文地質特性
Combining Drilling and a Geophysical Approach to Investigating the Hydrogeological Characteristics of the Babaoliao Landslide Area
作者: 張國欽
Kuo-Chin Chang
Hsin-Fu Yeh
Jung-Jun Lin
Nai-Chin Chen
Chien-Chung Ke
Jung-Chun Chen
關鍵字: 鑽探;地球物理法;侵入式與非侵入式探勘;Drilling;geophysical approach;invasive and noninvasive methods
Project: 中華水土保持學報, Volume 50, Issue 2, Page(s) 73-88

Heavy rainfall regularly occurs in Taiwan during the typhoon season in the summer and fall, and this rainfall causes large-scale natural disasters such as landslides, rockslides, and mudflows. Using a geophysical survey with both invasive and noninvasive methods, this study was conducted to preliminarily understand the hydrogeological characteristics of a landslide area and locate potential failure surfaces to strengthen slope failure prevention. The landslide area of Babaoliao region in Chiayi County of Taiwan was selected as the research site. Core drilling and analysis were conducted at the site; the results revealed that the 1-2-m-thick upper layer is composed of soil and weathered rock, which is similar to the conclusion reached through resistivity image profiling. Analysis of three boreholes (BH-01-3) determined a 2-3-m-thick layer of shear gouge in the subsurface layer between 18.3 and 26.5 m below ground. Investigation of the fractured rock masses in BH-02 and BH-03 revealed that the region has a large dip angle. Furthermore, geophysical survey of the boreholes demonstrated that both the outer and inner geological layers of the region are composed of silt-bearing marlstone that is not prone to cementation, causing a potential rupture surface. Inspection of BH-03 in terms of groundwater velocity and direction revealed a potential decrease in slope stability under heavy rain due to the rise in pore water pressure caused by the high hydraulic head connected to the borehole through fractures. The flow path formed by the soil-rock interface at 4 m below ground is a potential rupture surface.
Appears in Collections:第50卷 第02期

Files in This Item:
File SizeFormat
98974-4.pdf11.47 MBAdobe PDFView/Open
Show full item record
TAIR Related Article

Google ScholarTM


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.