Papers by abd rasid jaapar
E3S Web of Conferences
Several widespread debris flow disasters stroke Peninsular Malaysia in between 2021 and 2022, sca... more Several widespread debris flow disasters stroke Peninsular Malaysia in between 2021 and 2022, scattered across the country. It was the first time for this hazard being nationally recognised as a type of geological disaster in the country. Debris flow disaster is not a new phenomenon. It had been recorded since 1995, however, in the past they were isolated incidents and did not attract much attention. The recent widespread debris flow disasters started in Gunung Jerai, Kedah on 18 August 2021; followed by similar incidents but in 3 different states concurrently in (1) Bentong, Pahang, (2) Hulu Langat, Selangor, and (3) Jelebu, Negeri Sembilan on 18 December 2021; Kenyir, Terengganu on 27 February 2022; and finally at Gunung Inas, Kedah on 4 July 2022. These disasters sparked numerous technical and social issues where heated debates on whether they were purely due to natural processes or caused anthropogenic activities. Previously, debris flow phenomena in Malaysia were so rare, that ...
Sains Malaysiana
Rock slope stability assessment in Malaysia has become increasingly important as new developments... more Rock slope stability assessment in Malaysia has become increasingly important as new developments encroach hillsides around major cities. This article reviews historical case studies to present a general picture of rock slope assessment practice in Malaysia, especially on methods and output of the case studies. Common methods include use of locally developed rating systems, Rock Mass Rating (RMR) and its derivatives, kinematic analysis, and numerical analysis. Application of these methods must be suitable with site conditions, while its advantages and disadvantages must be recognized by the assessor. Emergence of new technologies greatly improves the speed and quality of data acquisition provided. A total of 39 case studies on different lithologies were examined, in which progress were notable from kinematic analysis-based assessments to incorporation of rating systems and numerical analysis. This article recommends several improvements for rock slope assessment practice. These incl...
Geological Society of Malaysia (GSM), 2017
Geological Society of Malaysia (GSM), 2018
Geological Society of Malaysia (GSM), 1991
Geological Society of Malaysia (GSM), 2017
Geological Society of Malaysia (GSM), 1998
대한지질공학회 í•™ìˆ ë°œí‘œë…¼ë¬¸ì§‘, 2019
대한지질공학회 í•™ìˆ ë°œí‘œë…¼ë¬¸ì§‘, 2019
... My girls; Wani, Dina, Izza and my boy; Icad – they are the fantastic four and wonderful kids,... more ... My girls; Wani, Dina, Izza and my boy; Icad – they are the fantastic four and wonderful kids, whose understanding and whose sacrifices made it possible for me to finish my study. ... 53 3.3.1.1 Planning Stage 53 3.3.1.2 Design and Development Stage 54 ...
EAGE-GSM 2nd Asia Pacific Meeting on Near Surface Geoscience and Engineering, 2019
I should acknowledge three persons who involved in making my dream to pursue my postgraduate stud... more I should acknowledge three persons who involved in making my dream to pursue my postgraduate study possible. First, the late Mr Taufik Ali, the founder of Taufik Ali Memorial Scholarship that granted me with full scholarship. Second, my employer and my mentor in geotechnical business, Mr. Kor Beng of Soils & Foundations Sdn Bhd. His generousity and support are irreplaceable. Third, my supervisor and the Director of MSc (Applied Geosciences), Professor Andrew W. Malone. His teaching greatly influenced and improved my way of thinking. My sincere gratitude goes to all my teachers, the academics and non-academics staffs of Department of Earth Sciences, the University of Hong Kong who had assisted me in one way another. Also, to my classmates who were very supportive and friendly to me and friends at the Malaysian General Consulate office who are very kind and helpful. There are friends in Malaysia who also assisted me directly or indirectly especially Dr. Tajul Anuar Jamaludin who provided me with most of the landslide images and Dr. Asan Ali Gholam Hasan who provided me with some of research materials. Support and encouragement from staffs of Soils & Foundations group of companies are highly appreciated. The following libraries are acknowledged for allowing me to use their facilities:
Bulletin Of The Geological Society Of Malaysia
Relatively cool tropical climate with high annual rainfall experienced in mountainous tropical re... more Relatively cool tropical climate with high annual rainfall experienced in mountainous tropical region creates favorable agricultural areas where intensive agricultural practices often correlate with increasing landslide events. While it has long been associated with landslides, agricultural practice in such areas especially in Cameron Highlands, Malaysia continues to flourish with minimal regard to environmental sustainability and safety. Therefore, this study aims to confirm the relationship between human activities and landslide occurrences and identify human practices that directly or indirectly cause landslides. Aerial photograph was used to identify landslides and anthropogenic features while other remotely sensed data including Interferometric Synthetic Aperture Radar (IFSAR) were used to establish the geomorphology of study area. A total of 207 landslides were identified in a 25 km2 area from remote sensing study and field mapping. They were superimposed over several potentia...
Bulletin of the Geological Society of Malaysia, May 1, 2002
Where good quality data have been obtained from careful supervision of subsurface exploration pro... more Where good quality data have been obtained from careful supervision of subsurface exploration program, it is essential that the exact geological conditions be carefully analyzed. Without this it is impossible to check the design assumptions or to apply the results to a similar situation elsewhere. This paper presents the use of geological modelling for civil engineering projects. The modelling is useful for any layman involved in engineering to understand the geological conditions, thus hinder all the surprises during the construction stage. It also useful for understanding geological and deposition process for prediction of the history of the ground. However, modelling must be made precisely. Insufficient data must not be treated as sufficient.
Bulletin of the Geological Society of Malaysia, May 1, 2003
Many engineering geologists devote a significant proportion of their time to the logging of boreh... more Many engineering geologists devote a significant proportion of their time to the logging of boreholes and, specifically, to the interpretation of rock cores in engineering terms. A variety of techniques have been devised for logging such cores. In Malaysia, the common practices are often inadequate in relation to modem requirements. This paper reviews the application of accurate rock core logging in rock mechanics and in engineering design process. It tries to compile some of its applications as a design aid in rock engineering. It is intended for geologists who are involved in geotechnical engineering to understand the relationship between accurate rock core logging and the design process in rock engineering. The importance and relation of accurate rock core logging on rock mass classification and its application to engineering design is highlighted. Abstrak: Kebanyakan ahli geologi kejuruteraan menghabiskan sebahagian besar masa mereka untuk mengelog lubang gerek terutamanya bagi mengintepretasi teras batuan dalam istilah kejuruteraan. Beberapa teknik telah wujud untuk mengelog teras batuan. Kertas ini mengulas penggunaan pengelogan tepat teras batuan dalam mekanik batuan dan proses rekabentuk kejuruteraan dan cuba untuk mengkompilasi sebahagian penggunaannya sebagai bahan rekabentuk dalam kejuruteraan batuan. Kertas ini juga ditujukan untuk ahli-ahli geologi yang terlibat dalam kejuruteraan geoteknik untuk memahami hubungan diantara pengelogan tepat teras batuan dengan proses rekabentuk dalam kejuruteraan batuan. Kepentingan dan hubungan pengelogan tepat teras batuan terhadap pengelasan massa batuan dan penggunaannya terhadap rekabentuk kejuruteraan diperjelaskan.
Bulletin of the Geological Society of Malaysia
Putrajaya, the new federal administrative capital of Malaysia which is being designed as a paperl... more Putrajaya, the new federal administrative capital of Malaysia which is being designed as a paperless city, is still under construction. The geology of Putrajaya was reported as being underlain mainly by Hawthorden Schist and interbedded sandstone and shale of the Kenny Hill Formation with a localised granite body. This paper discusses the occurrence of a very hard and abrasive rock body in Putrajaya. The name "Putrajaya Gneiss" is introduced for this rock body for discussion purposes for this paper based on preliminary study. Even though the distribution of this rock was only within a limited area, its occurrence was not expected, hence it created problems to the construction activities
Bulletin of the Geological Society of Malaysia
A new railway line was constructed recently in the state of Johor, Malaysia to link the Senai Air... more A new railway line was constructed recently in the state of Johor, Malaysia to link the Senai Airport and the newly built Tanjung Pelepas Port. Its alignment transverses some hilly terrain and thus resulted in the formation of a number of major cut slopes. One of them is a 35m high slope near Senai, Johor, which is cut in bedrock of the Late Cretaceous-Early Tertiary Pulai Granite. A preliminary post-construction geological assessments carried out on the rock slope indicate that most of the unstable elements are mainly due to excessive and poor blasting practice. Overblasting has resulted in widening of major joints, excessive overbreaks, unstable and loose overhanging blocks. Results of kinematic stability analysis on the discontinuities indicate that the rock slope has the potential to undergo planar, wedge and toppLing failures. Rock falls could also take place by over toppling. Excessive overbreaks and fragmentation of the rock mass could be minimised if a proper geological appraisal on the bedrock was carried out beforehand, and suitable blasting practice adopted during the excavation works. Based on the resu lts of this study, it was recommended that remedial measures should be undertaken in two different phases. Phase 1 is to scale off all the loose, potentially unstable blocks. This should be followed by phase 2 if necessary, i.e. fixing of wire netting, rock fall protection system or rock dowels .
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Papers by abd rasid jaapar