Handbook of Civil Engineering Calculations

FIGURE? EAATH THRUST ON RETAINING WALL CALCULATED BY RANKINE'S THEORY A retaining wall supports sand weighing 100 lb/ft^3 (15.71 ...

(a) Resultant pressures (b)Mohr's circle FIGURE 8 Using the Mohr's circle, state the equation for p Thus, _ [cos B - (cos 2 00 ...

EARTH THRUST ON RETAINING WALL CALCULATED BY COULOMB'S THEORY A retaining wall 20 ft (6.1 m) high supports sand weighing 100 lb/ ...

Considering BC as the true plane of failure, develop equations for x*, u, and P Thus, jc 2 = BE(BD) (17) -^ P = V 2 WU 2 Sm(P- ...

FIGURE 10. General wedge theory applied to timbered trench. force dR acting on any elemental area on the failure surface makes a ...

with the horizontal. Superimpose the drawing containing the spiral on the main drawing, orienting it in such a manner that O lie ...

dry and submerged state. The backfill carries a surclsarge of 320 lb/ft^2 (15.3 kPa). Apply- ing Rankine's theory, compute the t ...

between Z and C. Let P = resultant active pressure on wall; R 1 and R 2 = resultant passive pressure above and below center of r ...

the rod and the bending moment in the piling are reduced; the net result is a saving in ma- terial despite the increased length. ...

STABILITY OF SLOPE BY METHOD OFSLICES Investigate the stability of the slope in Fig. 14 by the method of slices (also known as t ...

Compute the length of arc AD Scale the radius of the arc and the central angle AOD, and compute the length of the arc AD. Thus, ...

by the unbalanced tangential force along the arc and by the external load. Therefore, con- sider a tangential force as positive ...

FIGURE 15 In Fig. 15, O is the center of an assumed arc of failure AC. Let W= weight of soil mass above arc AC; R = resultant of ...

The action line of C is parallel to the x axis. Determine the distance a by taking moments about O. Thus M = aC = acLc. a = (Y\ ...

out introducing any significant error. Thus, in Fig. 16, the soil prism OAB tends to heave by sliding downward along OA under ac ...

State the equation relating the four defined quantities Thus, H(e{ - e 2 ) '-TT^ (31) Solve for e 2 Thus: H= 30 in (762.0 mm) ...

environmental risks for 30 years after closing. Mining the landfill eliminates the need for closure while producing moneymaking ...

Compute the footing settlement Combine Eqs. 31 and 32 to obtain HCC log (0-2/(T 1 ) " i!«. (33) Solving gives s = 14(0.274) lo ...

(10.668 mm). Compute the bearing capacity of the pile by applying Redtenbacker's for- mula and using a factor of safety of 3. Ca ...

Compute the load Thus P 1 = 32 kips (142.3 kN); m = 4; n = 3; d = 10 in (254 mm); s = 36 in (914.4 mm); 6 = tan- 1 10/36 = 15.5 ...