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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Tunnel and Underground Space
Journal Basic Information
Journal DOI :
Korean Society for Rock Mechanics
Editor in Chief :
Volume & Issues
Volume 5, Issue 4 - Dec 1995
Volume 5, Issue 3 - Sep 1995
Volume 5, Issue 2 - Jun 1995
Volume 5, Issue 1 - Mar 1995
Selecting the target year
Application of the Evaluation System of Rock Mass in a Mountain Tunnel Constructed by NATM
Tunnel and Underground Space, volume 5, issue 4, 1995, Pages 297~307
Rock mass classification and slope stability using the stronet analysis technique in Boryung Dam site
Choon Sunwoo ;
Tunnel and Underground Space, volume 5, issue 4, 1995, Pages 308~317
The stability study on the rock slope where have produced failures in Boryung dam site was evaluated using the streonet analysis techniques. SMR(Slope Mass Rating) approach which is suitable for preliminary assessment of slope stability in rock was also carried out for rating rock mass. The 3-4 major discontinuity sets are distributed and all type of failure(plane, wedge and toppling failure) are presented in this slope face. The dip of slope must be lowered to friction angle(26degree), otherwise the possibility of plane and toppling faiue will always exist in this slope.
Determination of Elastic Constants of Transversely Isotropic Rocks
Tunnel and Underground Space, volume 5, issue 4, 1995, Pages 318~322
For transversely isotropic rocks such as schist, shale, etc, a method to determine the anisotropic elastic constants was proposed. Theoretically, equations of elastic constants E1, E2, and G2 can be derived from the measured strains in arbitrary three directions. If we attach three strain gages in accordance with the directons of anisotropy on the rock specimen under uni-axial compression, anisotropic elastic constants can be determined by these equations. With this method, the degree of anisotropy of transversely isotropic rocks will be easily evaluated by simple laboratory test.
A Study on the Development of Geothermal Energy Using the Hydraulic Fracturing method
Tunnel and Underground Space, volume 5, issue 4, 1995, Pages 323~335
A Development and Utilization of Geotechnical Information System(GTIS) of the Rock Mass in A Seoul Metropolitan Area(1)
Tunnel and Underground Space, volume 5, issue 4, 1995, Pages 336~346
Geotechnical Information System (GTIS) for efficient management of three dimensional borehole data has been developed. Some problems were raised during the input process of borehole data, and alternative solutions were sought. According to the previous geotechnical reports, there is no unified weathering classification scheme. A criterion, 100 times/30cm from SPT, was turned out inappropriate to the discrimination of weathered rock from weathered soil. It has also been suggested that weathered soil, weathered rock, soft rock, and hard rock should be defined as CW, HW, MW, and SW~fresh condition. For better comparison of RQD, the use of NX size coring is recommended for the whole area although BX size coring has been used in excavated area. The limit of drilling depth up to 1 m from the top of surface of hard rock should be extended to avoid possible wrong interpretation of rock head due to the existence of corestone. The input data were analysed by geostatistical methods. It is found that the range in semivariogram is about 300m, and the variance of gneiss is greater than that of granite. It is because the granite data analysed came from almost single uniform rock mass(i.e.Seoul granite), but gneiss data came from the rock mass(i.e. Gyeonggi gneiss complex experienced several metamorphic metamorphic processes.
A Study on the Variation of the Surface and Groundwater Flow System related to the Tunnel Excavation in DONGHAE Mine Area(l)-Concern on Hydrological and Rock Hydraulic Approach
Tunnel and Underground Space, volume 5, issue 4, 1995, Pages 347~362
The purpose of this study was that manage effectively the excavation process of the transport tunnel in DONGHAE mine area by investigating the variationof the surface and groundwater flow system around the tunnel and neighbouring villages. Thus, the effect of excavation and water-prrofing process on the water system has been studied through the naked eye survey of the tunnel and the surface outcrop, joint survey, core drilling, the measurement of the surface water quantity, evapotranspiration and precipitation analysis, rock hydraulics approach, the pressure test of boreholes, the variation of the water level, and finally the numerical analysis. From above approachs, we derived the conclusion that the exhaustion of the surface water was not caused by the tunnel excavation on the groundwater system was minimized by effective water proofing process.
The influence of residual stress on the engineering behaviour of rock
Tunnel and Underground Space, volume 5, issue 4, 1995, Pages 363~375
Critical literature review in this study revealed that there can be a significant influence of the residual stress on the engineering properties of rock. The review also showed that few number of research works on the quantification of the influence was attributed to the limitation of the two classical measurement techniques, viz, X-ray diffraction and mechanical relaxation method. In this study, a new way of approach was sought based on the assumption that residual stress up to the failure. A series of hoop tests conducted onthe samples from the limb of Carboniferous Limestone in Clevedon, England, revealed that (i) there is no preferential orientations of microcracks and minerals which have been widely believed as the main source of the strength anisotropy of rock; (ii) the anisotropy of the tensile strength of the limestone results from the influence of the residual stress; (iii) since jointing commenced within the fold, residual stored strain energy has been released preferentially in the direction perpendicular to the major joints(o
); (ⅳ) during the hoop test making it much easier to create tensile fracture in these directons, viz 45
)was released during the hoop test making it much easier to create tensile fracture in these directions, viz 45
;(v) the direction in which the stored strain energy may be presumed to be the least, required the greatest work to cause failure.
건물발파해체의 비밀(3)-남산 외인아파트 발파해체를 중심으로
Tunnel and Underground Space, volume 5, issue 4, 1995, Pages 376~393