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X-WR-CALDESC:Events for Faculty of Science and Technology | University of Macau
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TZID:Asia/Macau
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DTSTART:20170101T000000
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BEGIN:VEVENT
DTSTART;TZID=Asia/Macau:20171204T150000
DTEND;TZID=Asia/Macau:20171204T160000
DTSTAMP:20260515T203302
CREATED:20171204T070002Z
LAST-MODIFIED:20220927T043745Z
UID:6184-1512399600-1512403200@www.fst.um.edu.mo
SUMMARY:Exploration for Offshore Sand in Hong Kong: Detailed Surveys\, Dredging and Environmental Assessments
DESCRIPTION:Instructors/Speakers\nPaul Chi Tak CHEUNG\nChairman\nProfession Branch\nGeological Society of Hong Kong \nAbstract\nHong Kong used about 270Mm3 of marine dredged sand from 1990 to 2003 to form land for the Chek Lap Kok Airport and port facilities\, roads and various new town developments for housing and industry. The main sand reserves are Pleistocene fluvial deposits\, the upper portions of which were largely reworked and laterally transported by early Holocene tidal currents. Economic sand reserves mostly occur where later Holocene mud deposition has been restricted by high tidal flows. Sand dredging proposals have been subjected to the environmental impact assessment process and in some instances the decision was taken not to extract certain sand deposits for environmental\, ecological and socio-economic reasons. Detailed dredging assessments have been undertaken to quantify economic reserves. The key are the overburden ratio and a means to economically dispose of the overburden. Empty sand borrow pits were used for cost effective mud disposal while at the same time reinstating the seabed. The marine sand search study in 1990 was to locate and investigate all major offshore deposits of sand and gravel that could be used as reclamation fill in Hong Kong. The study comprised a two-stage offshore investigation of geophysical surveys and drilling followed by borehole logging and laboratory testing. The study had identified 14 potential marine sand areas with a combined volume of approximately 588Mm3. \nBiography\nMr. Paul Cheung is currently the Chairman of Profession Branch of Geological Society of Hong Kong. He obtained his B.S. and M.S. in Geology in National Taiwan University and University of Windsor\, Ontario\, respectively. He is a chartered engineer\, geologist\, and scientist of UK. He had conducted many geological related projects in Hong Kong. In particular\, he was involved with the “Exploration for Offshore Sand in Hong Kong” while he was working for the Civil Engineering Development Department of HKSAR. \n 
URL:https://www.fst.um.edu.mo/event/exploration-for-offshore-sand-in-hong-kong-detailed-surveys-dredging-and-environmental-assessments/
LOCATION:E12-G020
CATEGORIES:cee_events,event_list,seminarslectures
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DTSTART;TZID=Asia/Macau:20171212T110000
DTEND;TZID=Asia/Macau:20171212T120000
DTSTAMP:20260515T203302
CREATED:20171212T030048Z
LAST-MODIFIED:20220927T043745Z
UID:6187-1513076400-1513080000@www.fst.um.edu.mo
SUMMARY:Interpretation Of CPTu in Consolidating Soils
DESCRIPTION:Instructors/Speakers\nProf. Paulus P. Rahardjo\nProfessor of Geotechnical Engineering Division\nFaculty of Engineering\nUniversitas Katolik Parahyangan (Unpar)\nIndonesia \nAbstract\nThe interpretation of CPTu for normally consolidated clay soils and slightly\, or strongly overconsolidated soils have been published in many papers. For both conditions of soils (normally consolidated and overconsolidated clay)\, there is hydrostatic pore water pressure\, however no initial excess pore water pressure exists. Hence the assumption that excess pore water pressure due to cone penetration only is valid. In soils where consolidation still on going which could be due to natural deposition of the soils or soft soils under reclamation fill material\, the excess pore pressure still exists\, which means that pior to penetration testing\, the initial excess pore pressure has not completely diminished. In this case\, the measured excess pore water pressure shall be interpreted as combined existing pore water pressure and the additional excess pore water pressure due to cone penetration. In case of testings conducted at certain interval time such as during the course of consolidation in reclamation area\, then the excess pore pressure response as well as the tip resistance and the frction ratio will change toward a normally consolidated condition. This paper represents research results of CPTu in reclaimed soils and the authors have developed methods for interpretation of these combined excess pore water pressures. In the end\, the methods can separate between the excess pore water pressure due to penetration and the prior existing pore water pressure. The methods include the use of Schmertmaan method (which is found not suitable for reclamation case histories)\, the Use of Bq value and the dissipation curve with considering the existing excess pore water that still exists. The tip resistance in underconsolidating soft soils subjected to fill placement will not form a linear tip resistance (not straight line) when carefully examined (Schmertmann assumption not applicable in such cases) and hence the interpretation were done considering the initial (remaining) excess pore pressure or the effective stress at certain time. The methods have been proved to be consistent and has the potensial for more accurate interpretation. \nBiography\nProf Paulus P. Rahardjo completed undergraduate study at Universitas Katolik Parahyangan (Unpar) and since then has been faculty members at the university. He pursued graduate study in highway engineering at Bandung Institute of Technology (ITB)\, then Master’s Degree and Ph.D degree from Virginia Tech (USA). He has been actively engaged in teaching\, research as well as hundreds of geotechnical consultancy. He works for design and advising clients on many geotechnical problems including building foundations\, highways\, tunnels\, bridges\, jetys and wharfs\, dams\, coal minings etc. Among his specialies with intense experience in research and practice are in the field of insitu testings and landslides or slope protections. He has written more than 200 articles/ papers\, research reports and manuals. He has served the university as Department Head\, Vice Dean of Faculty of Engineering\, Director of the Graduate Program and Vice Rector for Academic Affairs. Currently\, he is the coordinator of Geotechnical Engineering Division and Director of Research Center for Infrastructure and Urban Development. His affiliation include the Indonesian Geotechnical Society (HATTI)\, American Society of Civil Engineers in the Geo-Institute\, the Indonesian Experts on Disasters (IABI) and Board Representative of International Consortium on Landslides (ICL)\, currently responsible for project IPL-195 Study for Mitigation and Recovery of Mud Eruption Disaster in East Java and Modeling for Risk Reduction Mudflow Hazards. \n 
URL:https://www.fst.um.edu.mo/event/interpretation-of-cptu-in-consolidating-soils/
LOCATION:E11-G015
CATEGORIES:cee_events,event_list,seminarslectures
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