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005			20260817162901.0
008			090903s2009 th uu|m rtt 0| a1eng d
035			_a.b12066898
099		9	_aAIT Thesis no.GE-08-01
100	0		_aDamrongsak Kham-ai
245	1	0	_aApplication of geostatistics in assessment of rock mass condition for mountainous tunnels in Thailand
260			_aPathum Thani, Thailand : _bAsian Institute of Technology, _c2009
300			_a143 p. : _bill. + _e1 online resource
490	1		_aThesis ; _vno. GE-08-01
500			_aA thesis submitted in partial fulfillment of the requirements for the degree of Master of Science in Geotechnical and Geoenvironmental Engineering, School of Engineering and Technology
502			_aThesis (M.Sc.) - Asian Institute of Technology, 2009
520			_aUnforeseen of rock mass conditions exists in mountainous tunneling. Traditional investigation methods such as the borehole data are not adequate to give clear information on rock mass condition. Therefore a geostatistical treatment of the investigation data may be helpful in modeling the prediction. Rock mass conditions of Lam Ta Khung Pumped storage project and Klong Tha Dan dam project were evaluated by means of Geomechanics Classification (RMR). Initially, RMR values were determined from the borehole data. Statistics analysis was basically performed to check the distribution of data and sampling error. Then, the geostatistics analysis including variogram and kriging were conducted to estimate RMR values and to draw RMR contour map data in the rock mass. The ordinary kriging or the best linear unbiased estimation was used to estimate the RMR value along tunnels in Lam Tha Khong Pumped storage project and Klong Ta Dan dam project. Finally, reliability of the estimated values was verified by comparing with RMR obtained from the tunnel face mapping. Moreover, the uncertainty of kriged estimation could be evaluated in form of standard deviation of kriging. The results show the most likelihood of estimation met at Lam Tha Khong project but not at Klong Tha Dan project. The study shows that the reliability of the geostatistical prediction depends a great deal on the geological characteristics of the site
650		0	_aRock mechanics _zThailand
650		0	_aGeology _zThailand _xStatistical methods
650		0	_aTunnels _zThailand _xStatistical methods
700	0		_aNoppadol Phien-Wej, _eChairperson
700	1		_aBergado, Dennes T., _eExamination Committee
700	1		_aPark, Kyung Ho, _eExamination Committee
710	2		_aRTG Fellowship, _eScholarship donor
810	2		_aAsian Institute of Technology. _tThesis ; _vno. GE-08-01
856			_3Full-Text _uhttp://203.159.5.9/ait-thesis/detail.php?q=B02981
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