The Use of Rock Mass Classification Systems to Estimate the Modulus and Strength of Jointed Rock

被引：28

作者：

Justo, J. L. ^{[1
]}

Justo, E. ^{[1
]}

Azanon, J. M. ^{[2
]}

Durand, P. ^{[1
]}

Morales-Esteban, Antonio ^{[1
]}

机构：

[1] Univ Seville, Dept Continuum Mech, ETS Arquitectura, E-41012 Seville, Spain

[2] Univ Granada, Dept Geodynam, Granada, Spain

来源：

ROCK MECHANICS AND ROCK ENGINEERING | 2010年 / 43卷 / 03期

关键词：

Modulus of deformation; Jointed rock; Basalt; Finite elements; Rock mass classification; Elasto-plastic methods; Stability of slopes; DEFORMATION MODULUS; GSI;

D O I：

10.1007/s00603-009-0040-6

中图分类号：

P5 [地质学];

学科分类号：

0709 ; 081803 ;

摘要：

Three-dimensional, elastic and elasto-plastic finite element (FE) programs have permitted calculation of the displacements and the factor of safety (FOS) for the excavation for a tower, 132.70 m high (above foundation) on the island of Tenerife. The tower is supported by a 2 m thick reinforced concrete slab on jointed, vesicular and weathered basalt and scoria. The installation of rod extensometers at different depths below the slab has permitted comparison between measured and calculated displacements and the estimation of in situ deformation modulus. The moduli deduced from the simple empirical equations proposed by Hoek et al. (In: NARMS-TAC, 2002) and Gokceoglu et al. (Int J Rock Mech Min Sci 40:701-710, 2003) as a function of GSI, and Nicholson and Bieniawski (Int J Min Geol Eng 8:181-202, 1990) as a function of RMR, provide an acceptable fit with the measured settlements in this type of rock. Good correlation is also obtained with the empirical equation presented by Verman et al. (Rock Mech Rock Eng 30(3):121-127, 1997) that incorporates the influence of confining stress in the deformation modulus. The FOS obtained from different correlations with geomechanical classifications is within a relatively narrow range. These results increase our confidence in the use of classification schemes to estimate the deformation and stability in jointed rock.

引用

页码：287 / 304

页数：18

共 35 条

[11]

HAMMAH RE, 2004, EUROCK 2004 53 GEOM

[12] Empirical estimation of rock mass modulus [J].

Hoek, E ;

Diederichs, MS .

INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES, 2006, 43 (02) :203-215

[13]

HOEK E, 1983, GEOTECHNIQUE, V33, P185

[14]

Hoek E., 2002, P 5 N AM ROCK MECH S, P267, DOI DOI 10.1016/J.IJRMMS.2005.06.005

[15]

Hoek E, 1995, Support of underground excavations in hard rock

[16]

Hoek E., 1994, ISRM NEW J, V2, P4

[17]

Hoek E, 1997, INT J ROCK MECH MIN, V40, P701

[18]

HOEK E, 2006, ROCLAB 1 0 ROCK MASS

[19]

Justo J.L., 1981, GEOTECNIA CIMIENTOS, VII

[20] The foundation of a 40-storey tower in jointed basalt [J].

Justo, JL ;

Justo, E ;

Durand, P ;

Azañón, JM .

INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES, 2006, 43 (02) :267-281

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