Geotechnical Engineering

DHARM 340 GEOTECHNICAL ENGINEERING The line of action of U will pass through the centre of the circle. The resultant of W and U ...

DHARM STABILITY OF EARTH SLOPES 341 nH b H DH When slip circle can pass below toe, use full lines. (n is indicated by dotted lin ...

DHARM 342 GEOTECHNICAL ENGINEERING 9.4 Illustrative Examples Example 9.1: Fig. 9. 27 shows the details of an em- bankment made o ...

DHARM STABILITY OF EARTH SLOPES 343 = 50 × 16.5^2 × (93/180) × π × 1(3040 × 5) = 1.45. (Note: Here, W and e are obtained by divi ...

DHARM 344 GEOTECHNICAL ENGINEERING Cohesive strength c = 200 kN/m^2 ∴ Factor of safety with respect to cohesion: Fc = c cm =^200 ...

DHARM STABILITY OF EARTH SLOPES 345 \ The factor of safety for the slope = 1.35. Example 9.6: A cutting is to be made in clay fo ...

DHARM 346 GEOTECHNICAL ENGINEERING \ Safe angle of slope is 8 °. Example 9.8: A canal is to be excavated through a soil with c = ...

DHARM STABILITY OF EARTH SLOPES 347 The following ru values obtained from a flow net and weights of slices are given: Slice No. ...

DHARM 348 GEOTECHNICAL ENGINEERING Slice z(m) b(m) W (k N ) α° sin α W sin α c′ b W( 1 –r )cu ′b + W sec α tan α sectan αtan φα ...

DHARM STABILITY OF EARTH SLOPES 349 (b) Rigorous approach: The calculations for the rigorous approach are set out in the tabular ...

DHARM 350 GEOTECHNICAL ENGINEERING References Alam Singh and B.C. Punmia: Soil Mechanics and Foundations, Standard Book House, ...

DHARM STABILITY OF EARTH SLOPES 351 9.7 A 40-degree clay slope has a height of 5 m. Assuming a toe circle failure starting 1 m f ...

10.1 INTRODUCTION Stress in soil in caused by the first or both of the following: (a) Self-Weight of soil. (b) Structural loads, ...

DHARM STRESS DISTRIBUTION IN SOIL 353 where σz = vertical stress in soil at depth z below the surface due to its self-weight, an ...

DHARM 354 GEOTECHNICAL ENGINEERING shear stress acts. In Fig. 10.1 (c), the cylindrical co-ordinates and the corresponding norma ...

DHARM STRESS DISTRIBUTION IN SOIL 355 = Qzr (^2) rz rzzrz 312 2 π^22522222 υ () () / − − ++ + L N M M O Q P P ...(Eq. 10.6 (b)) ...

DHARM 356 GEOTECHNICAL ENGINEERING 0.5 0.4775 0.4 0.3 0.2 0.1 0 123 Influence coefficient, K B 0.329 0.221 0.139 0.084 0.051 0.0 ...

DHARM STRESS DISTRIBUTION IN SOIL 357 Vertical Stress Distribution on a Horizontal Plane The vertical stress on a horizontal pla ...

DHARM 358 GEOTECHNICAL ENGINEERING Vertical Stress Distribution Along a Vertical Line The variation of vertical stress with dept ...

DHARM STRESS DISTRIBUTION IN SOIL 359 10.2.3 Stress Isobar or Pressure Bulb Concept An ‘isobar’ is a stress contour or a line wh ...