The use of seismic refraction method in slope failure investigation

702001-100879-676-B
Author : Khairul Anuar Mohd. Nayan, Rahman Yaccup, Abd. Rahim Samsudin, Umar Hamzah and Abd. Ghani Rafek
Publication : Bulletin of the Geological Society of Malaysia
Page : 203-213
Volume Number : 40
DOI : https://doi.org/10.7186/bgsm40199715

Bulletin of the Geological Society of Malaysia, Volume 40, July 1997, pp. 203 – 213

 

The use of seismic refraction method in slope failure investigation

KHAIRUL ANUAR MOHD. NAYAN1, RAHMAN YACCUP2, ABD. RAHIM SAMSUDIN2UMAR HAMZAH2 AND ABD. GHANI RAFEK2

1Jabatan Kejuruteraan Awam & Struktur, Universiti Kebangsaan Malaysia, 43600 Bangi

2Jabatan Geologi, Universiti Kebangsaan Malaysia, 43600 Bangi

 

Abstract: This study is focused on a slope failure investigation for a site of Semantan Formation located at the Temerloh-Mentakab route, Pahang. Ground investigation employing seismic refraction survey was conducted followed by trial pits, Macintosh probe and wash drilling with standard penetration tests (SPT). Laboratory tests that includes classifications, drained shear box and consolidated undrained triaxial with pore pressure measurements were also carried out. The results of the velocity profile from several spread lines have indicated a possible shallow failure from a weak soil material that overlie a deeper sliding failure mass. The two possible sliding surfaces interpreted from the seismic velocity profiles were found to correlate well with the Macintosh probe and the SPT conducted on adjacent boreholes. A lateral variation in the velocity profiles from several spread lines have shown that the dominantly argillaceous material could be delineated from the dominantly arenaceous material that has been unaffected in the slide and conforms well with the geological facies of the site. The topography of the post failure ground level and the probable slip surface, interpreted from the seismic refraction profiles were then represented using a 3-D graphic software in order to evaluate the overall sliding mass. 

https://doi.org/10.7186/bgsm40199715