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윤성학(Yun Sung-Hak),이건(Lee Kun),사상호(Sha Sang-Ho),박세주(Park Sei-Joo),라일웅(Ra Il-woong),천윤철(Cheon Yoon-chul),조남준(Cho Nam Jun) 한국철도학회 2005 한국철도학회 학술발표대회논문집 Vol.- No.-
The uncemented breccia consisted of conglomerate and breccia, which are not originated from volcanic clastics, shows wide variation of engineering properties depending on the characteristics of matrix of the uncemented breccia. These uncemented breccia have breccia and matrix irregularly distributed according to their depth and position. Clay minerals are also included in the matrix of these uncemented breccia, so they are expected to show expansive behavior and weakness against weathering process. In this study, the volumetric ratio of breccia on the cores had been calculated using digital image processing technique (performed on recovered core box and their sections). The 3-axial compressional strength test had been done with a shaping of rapid cooling method, and the shear strength (c, φ) of uncemented breccia due to the breccia content had been calculated by applying BIMROCK model curve suggested by Goodman. A reliable analysis on the engineering properties of uncemented breccia had been also possible by using borehole density logging and borehole loading test for the accurate determination of the unit weight and the deformation constants deformation modulus.