4CE6.1            ROCK MECHANICS

L 3

UNIT: 1

ENGINEERING CLASSIFICATION OF ROCKS:

Objectives, Intact rock classification, Rock mass

Classification. Terzaghi’s, Rock load classification, Austrian classification, Deere’s rock quality classification, rock

structure rating concept, RMR classification, Q classification. Inter relation between Q and RMR, prediction of ground

condition and support pressure. Effect of Tunnel size on support pressure.

UNIT: 2

ENGINEERING PROPERTIES AND LABORATORY TESTS ON ROCKS:

Porosity, Density,

Moisture content, Degree of saturation, Co-efficient of permeability, Durability, Compressive strength,

Tensile strength, Shear strength, elasticity, Plasticity Deformability.

Sampling and Samples Preparations, Uniaxial Compressive strength, Tensile Strength – Brazilian test, Shear

strength test – Direct Shear test and Punch shear test, Triaxial Test, Flexural strength.

UNIT: 3

INSITU TESTS ON ROCKS:

Necessity of Insitu test, Plate load test for deformability, Shear test, Test for

internal stresses – flat Jack, pressure meter test.

JOINTED ROCKS:

Rocks Joint properties, Joint properties, Joint Roughness Co-efficient, Scale effects,

Dilation, Orientation of Joints, Gouge, Joint Intensity, Uniaxial Compressive strength of Jointed Rocks.

UNIT: 4

STRENGTH OF ROCKS IN UNCONFINED CONDITION:

Ramamurthy Strength Criteria, Singh and

Rao Strength Criteria, Kulatilake Methodology, Hoek Criteria, Barton Methodology.

STRENGTH OF ROCKS IN CONFINED CONDITION:

History of Hoek and Brown Failure Criterions

and latest methodology, Parabolic Strength Criteria.

UNIT: 5

GROUTING AND ROCK BOLTING:

Grouting materials, Grouting operations, methods of Grouting,

Mechanism of Rock Bolting, Principal of design.

BEARING CAPACITY OF ROCKS:

Bearing capacity of intact rocks, jointed rocks,IS Code

methodology, Singh and Rao Method and latest methodologies.