Laboratory Shear Tests of Rock Specimens Collected From Site of Tsao-Ling Earthquake-induced Landslide

Ikuo Towhata; Hitoshi  Yamazaki; Mamoru  Kanatani; Ching-en  Lin; Takahiro  Oyama

doi:10.6180/jase.2001.4.3.08

Laboratory Shear Tests of Rock Specimens Collected From Site of Tsao-Ling Earthquake-induced Landslide

Ikuo Towhata This email address is being protected from spambots. You need JavaScript enabled to view it.¹ , Hitoshi Yamazaki¹ , Mamoru Kanatani² , Ching-en Lin¹ and Takahiro Oyama²

¹Geotechnical Engineering University of Tokyo Bunkyo, Tokyo 113-8656, Japan
²Senior research Engineer Central Research Institute of Electric Power Industry 1646 Abiko, Abiko-shi, Chiba, 270-1194, Japan

Received: July 16, 2001
Accepted: August 20, 2001
Publication Date: September 1, 2001

Download Citation: ||https://doi.org/10.6180/jase.2001.4.3.08

ABSTRACT

This paper describes a part of the geotechnical investigation which was initiated by the Japanese Geotechnical Society on the damages caused by the 1999 Chi-Chi earthquake of Taiwan. The attention herein is particularly focused on the gigantic landslide at Tsao-ling where the authors collected rock specimens and conducted laboratory direct shear tests. A brief seismic stability analysis was carried out then by using the strength parameters obtained by the tests. It was found that a mudstone stratum among other types of rock most likely failed during the earthquake. It is noteworthy that the joints or discontinuities in the rock mass which were generated by past earthquake actions can most reasonably account for the failure event.

Keywords: Chi-Chi Earthquake, Direct Shear Test, Rock, Slope Failure, Stability Analysis

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