for rock mass

ROCK MASSES AS CONSTRUCTION MATERIALS

ROCK MASSES AS CONSTRUCTION MATERIALS

A rock mass is a material quite different from other structural materials used in civil engineering. It is heterogeneous and quite often discontinuous, but is one of the materials in the earth''s crust, which is most used in man''s construction. Ideally, a rock mass is ...

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Rock Mass Rating

Rock Mass Rating

Rock Mass Rating RMR should be determined as an algebraic sum of ratings for all of the parameters given in Tables 6.1 to 6.5 and Table 6.10 after adjustments for orientation of discontinuities given in Tables 6.8 and 6.9. From: Engineering Rock Mass Classification, 2011

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p-y Criterion for Rock Mass | Journal of Geotechnical and …

p-y Criterion for Rock Mass | Journal of Geotechnical and …

Drilled shafts socketed in rock mass have been used frequently as a foundation system to support both vertical and lateral loads. Traditionally, the lateral interaction between the drilled shaft and the surrounding rock medium has been characterized by means of nonlinear p - y curves; however, there is a lack of well verified p - y criterion for rock mass.

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Australian Centre for Geomechanics | Conference Paper: …

Australian Centre for Geomechanics | Conference Paper: …

Cai, M, Kaiser, PK, Uno, H, Tasaka, Y & Minami, M 2004, ''Estimation of rock mass deformation modulus and strength of jointed hard rock masses using the GSI system'', International Journal of Rock Mechanics and Mining Sciences, vol. 41, pp. 3–19. , DU ...

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ROCK MASSES AS CONSTRUCTION MATERIALS

ROCK MASSES AS CONSTRUCTION MATERIALS

A rock mass is a material quite different from other structural materials used in civil engineering. It is heterogeneous and quite often discontinuous, but is one of the materials in the earth''s crust, which is most used in man''s construction. Ideally, a rock mass is ...

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Australian Centre for Geomechanics | Conference Paper: …

Australian Centre for Geomechanics | Conference Paper: …

Dinc, OS, Sonmez, H, Tunusluoglu, C & Kasapoglu, KE 2011, ''A new general empirical approach for the prediction of rock mass strengths of soft to hard rock masses'', International Journal of Rock Mechanics and Mining Sciences, vol. 48, pp. 650–665.

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Strategies of Rock Mass Grouting for Tunnel Operations

Strategies of Rock Mass Grouting for Tunnel Operations

rock mass with OPC mixes in a first step and secondary to close the remaining fine voids or joints with fine cement or colloidal suspensions. This method proved as one of the most cost effective ...

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Rock Engineering and Rock Mechanics: Structures in and …

Rock Engineering and Rock Mechanics: Structures in and …

 · Rock mass characterization by means of advanced survey methods Representation of rock discontinuities in safety analysis of large dams Foundations on rock masses The impact of brittle behaviour of rocks on tunnel excavation design Case histories of rock ...

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rock mass | Encyclopedia

rock mass | Encyclopedia

 · rock mass A large and indistinct body of solid earth materials, containing features on the scale of jointing, folding, schistosity, etc.The term would not be used to describe a rock only the size of a hand specimen. Citation styles Encyclopedia gives you the ...

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Rock Mass Properties-22.pdf

Rock Mass Properties-22.pdf

View Rock Mass Properties-22.pdf from EME 2310 at Jomo Kenyatta University of Agriculture and Technology, Nairobi. • For intact rock, the constant s is equal to 1, namely, the

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REPORT ON GEOLOGY: ROCK MASS

REPORT ON GEOLOGY: ROCK MASS

Rock mass as construction site provides foundation for building, reservoir, base for road alignment etc. Rock mass = Intact rock +discontinuity The following parameters are related to the intact rock. The rock mass is classified on its outcrop on the basis of ...

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Evaluation of rock mass strength criteria

Evaluation of rock mass strength criteria

viii RMR basic = Rock Mass Rating Basic value, (RMR for dry conditions and no adjustment for joint orientation) RMR 76 = Rock Mass Rating based on the version from 1976 Q = the rock mass Quality system (rock mass classification, NGI-index) Q'' = a modified Q-system, which is stress reduction free and where the ...

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An equivalent viscoelastic model for rock mass with parallel joints

An equivalent viscoelastic model for rock mass with parallel joints

Rock Mass with Parallel Joints [7] Natural jointed rock mass is discontinuous and may include one or more joint sets. When an incident wave propagates across the rock mass, the transmitted wave depends on not only the properties of the incident wave, but

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Estimating Rock Mass Strength

Estimating Rock Mass Strength

disturbed rock mass when determining parameters in the failure criterion, for which clear guidelines are lacking. Also, the modified Hoek-Brown criterion gives physically questionable values for the rock mass strength and should be used with caution in low-stress ...

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Rock Mass Characterization | Geoengineer

Rock Mass Characterization | Geoengineer

Rock mass is a matrix consisting of rock material and rock discontinuities. Its characterization and classification aim to determine the rock mass characteristics by assigning values to a set of rock parameters. The behavior of intact rock material can be ...

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Rock Mass Characterization | Geoengineer

Rock Mass Characterization | Geoengineer

Rock mass is a matrix consisting of rock material and rock discontinuities. Its characterization and classification aim to determine the rock mass characteristics by assigning values to a set of rock parameters. The behavior of intact rock material can be ...

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Determining Rock Mass Bearing Capacity and Strength

Determining Rock Mass Bearing Capacity and Strength

To determine the rock mass bearing capacity in any rock it is necessary to ensure that the rock has continuity that is at least four to five times the width of the foundation. So if a foundation has dimensions of 100 feet by 200 feet, the rock mass should have a continuity of 400 feet by 800 feet.

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Australian Centre for Geomechanics | Conference Paper: …

Australian Centre for Geomechanics | Conference Paper: …

Based on the results of the rock mass classification systems and uniaxial rock strength tests, the rock mass strength was determined using different approaches. Further on the rock mass strength results were compared to the estimated in situ state of stress, calculated by the weight of the overlying rock strata, assuming a hydrostatic state of stress and physical conditions of the drift.

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ROCK MASS CLASSIFICATION – A CRITICAL EVALUATION OF THE …

ROCK MASS CLASSIFICATION – A CRITICAL EVALUATION OF THE …

rock masses, the degree of jointing (RQD), the degree of weathering, rock drillability and blastability, as well as performance of tunnel boring machines (TBM). A common platform

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TUNNEL DESIGN BY ROCK MASS CLASSIFICATIONS

TUNNEL DESIGN BY ROCK MASS CLASSIFICATIONS

use of rock mass classifications for tunnel design (covering the period 1979 -1984). This report, reprinted in FY 90, adds a Bibliography covering the appropriate literature through 1986. The Commander and Director of WES during the preparation of this report 0 ...

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Rock mass properties

Rock mass properties

Rock mass properties. Rock mass properties. Introduction. Reliable estimates of the strength and deformation characteristics of rock masses are required for almost any form of analysis used for the design of slopes, foundations and underground excavations. Hoek and Brown (1980a, 1980b) proposed a method for obtaining estimates ...

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Estimating Rock Mass Strength

Estimating Rock Mass Strength

disturbed rock mass when determining parameters in the failure criterion, for which clear guidelines are lacking. Also, the modified Hoek-Brown criterion gives physically questionable values for the rock mass strength and should be used with caution in low-stress ...

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Rock mass properties for engineering design | Quarterly …

Rock mass properties for engineering design | Quarterly …

Rock mass classification is a widely used, economical and extremely useful basis for determining properties, but there are dangers in uncritical application. The classification methodology is critically examined, and the use of multivariate statistics applied in a multi-dimensional space is considered to optimize the usefulness of the measured data.

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St. Brigid''s Rock Mass

St. Brigid''s Rock Mass

St. Brigid''s Rock Mass, Vector. 151 likes. An online meeting place for the 6 pm mass family LIS and JIM playing this Friday at Charles Ave. Cafe in Hicksville for the Happy Hour(s) beginning music at 5:30 PM. If you are interested please come on down and help a

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Rock mass properties for engineering design | Quarterly …

Rock mass properties for engineering design | Quarterly …

Rock mass classification is a widely used, economical and extremely useful basis for determining properties, but there are dangers in uncritical application. The classification methodology is critically examined, and the use of multivariate statistics applied in a multi-dimensional space is considered to optimize the usefulness of the measured data.

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A generic method for rock mass classification

A generic method for rock mass classification

 · Rock mass classification (RMC) is of critical importance in support design and applications to mining, tunneling and other underground excavations. Although a number of techniques are available, there exists an uncertainty in application to complex underground works. In the present work, a generic rock mass rating (GRMR) system is developed.

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Intact Rock and Rock Mass

Intact Rock and Rock Mass

 · Rock mass classification systems such as Rock Mass Rating (RMR), Q-System and Geological Strength Index (GSI) do just that. They assign a score for the specific rock mass, based on the intact rock ...

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1 Rock mass classification

1 Rock mass classification

Rock mass classification 3 Classifications involving stand-up time Lauffer (1958) proposed that the stand-up time for an unsupported span is related to the quality of the rock mass in which the span is excavated. In a tunnel, the unsupported span is defined as the ...

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ROCK MASSES AS CONSTRUCTION MATERIALS

ROCK MASSES AS CONSTRUCTION MATERIALS

From Palmström A.: RMi – a rock mass characterization system for rock engineering purposes. PhD thesis, Oslo University, Norway, 1995, 400 p. Chapter 2 ROCK MASSES AS CONSTRUCTION MATERIALS "Rock masses are so variable in nature that the

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rock mass_"rock mass"

rock mass_"rock mass"

rock mass"rock mass": 1. The process of alternating solid rock masses is called metamorphism .。 2. These screes are generally small pieces of rock which have become detached from the rock mass . ...

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Estimating Rock Mass Strength

Estimating Rock Mass Strength

disturbed rock mass when determining parameters in the failure criterion, for which clear guidelines are lacking. Also, the modified Hoek-Brown criterion gives physically questionable values for the rock mass strength and should be used with caution in low-stress ...

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Investigation of Rock Mass Properties for Foundation …

Investigation of Rock Mass Properties for Foundation …

Rock Mass Weathering Weathering is the degradation and disintegration of the intact rocks and changing to soft rock and consequently reduces the ultimate strength of the intact rock. There are several factors that cause weathering of rock mass for instance environmental influences, leaching of ground water, and chemical attacks.

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Rock mass classification

Rock mass classification

Rock mass classification. Rock mass classification systems are used for various engineering design and stability analysis. These are based on empirical relations between rock mass parameters and engineering applications, such as tunnels, slopes, foundations, and excavatability. The first rock mass classification system in geotechnical engineering ...

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Determining Rock Mass Bearing Capacity and Strength

Determining Rock Mass Bearing Capacity and Strength

To determine the rock mass bearing capacity in any rock it is necessary to ensure that the rock has continuity that is at least four to five times the width of the foundation. So if a foundation has dimensions of 100 feet by 200 feet, the rock mass should have a continuity of 400 feet by 800 feet.

Get price
1 Rock mass classification

1 Rock mass classification

Rock mass classification 3 Classifications involving stand-up time Lauffer (1958) proposed that the stand-up time for an unsupported span is related to the quality of the rock mass in which the span is excavated. In a tunnel, the unsupported span is defined as the ...

Get price
Rock Mass Characterization

Rock Mass Characterization

List the rock parameters that you would use in a rock mass-rock engineering classification scheme for this objective. A12.8 The principal rock engineering objective is to reduce potential gas leakage to an acceptably low level. The primary gas leakage pathway is ...

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Q-system (geotechnical engineering)

Q-system (geotechnical engineering)

For the genetic method, see Q-system (genetics). The Q-system for rock mass classification is developed by Barton, Lien, and Lunde. It expresses the quality of the rock mass in the so-called Q-value, on which are based design and support recommendations for underground excavations. The Q …

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Investigation of Rock Mass Properties for Foundation …

Investigation of Rock Mass Properties for Foundation …

Rock Mass Weathering Weathering is the degradation and disintegration of the intact rocks and changing to soft rock and consequently reduces the ultimate strength of the intact rock. There are several factors that cause weathering of rock mass for instance environmental influences, leaching of ground water, and chemical attacks.

Get price
rock mass | Encyclopedia

rock mass | Encyclopedia

 · rock mass A large and indistinct body of solid earth materials, containing features on the scale of jointing, folding, schistosity, etc.The term would not be used to describe a rock only the size of a hand specimen. Citation styles Encyclopedia gives you the ...

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HOW TO DESCRIBE ROCK MASS CHARACTERISTICS ON …

HOW TO DESCRIBE ROCK MASS CHARACTERISTICS ON …

 · Rock Mass Description 9. Spacing Discontinuity Spacing can be mapped in rock faces and in drill core; spacing categories range from extremely wide (> 6000 mm) to very narrow (< 6 mm). The spacing of individual discontinuities has a strong influence on the 10.

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