Questions from Geotechnical Engineering

Q: For a given sandy soil, emax = 0.75,

For a given sandy soil, emax = 0.75, emin = 0.46, and Gs = 2.68. What will be the moist unit weight of compaction (kN/m3) in the field if Dr = 78% and w = 9%?

Q: Refer to Section 14.13 and Figure 14.28.

Refer to Section 14.13 and Figure 14.28. Determine the seismic earth pressure from the soil backfill on the retaining wall, considering  = 110o,  = 12o, ’ = 21o, ’ = 2/3 ’ = 14o, c’ = 30 kN/m2 ,...

Q: A retaining wall has a vertical back face with a horizontal granular

A retaining wall has a vertical back face with a horizontal granular backfill. Given: H = 6 m,  = 18.5 kN/m3 , ’ = 408, and ’ = 1/2’. Estimate the passive force, Pp, per unit length of the wall us...

Q: Redo Problem 15.8 when ( = 0o and  =

Redo Problem 15.8 when ( = 0o and  = 12o (Figure 15.7 and Table 15.6).

Q: Refer to the retaining wall described in Problem 15.8.

Refer to the retaining wall described in Problem 15.8. If there is seepage in the backfill (as shown in Figure 15.8), what would be the magnitude of Pp based on the theory described in Section 15.7? A...

Q: A braced wall is shown in Figure 15.23. Given

A braced wall is shown in Figure 15.23. Given: H = 7 m, naH = 2.8 m, ’ = 30o, ’ = 20o,  = 18 k...

Q: The elevation and plan of a bracing system for an open cut

The elevation and plan of a bracing system for an open cut in sand are shown in Figure 15.24. Using Peck’s empirical pressure diagrams, determine the design strut loads. Given: ï...

Q: The cross section of a braced cut supporting a sheet pile installation

The cross section of a braced cut supporting a sheet pile installation in a clay soil is shown in Figure 15.25. Given: H = 12 m, clay = 17.9 kN/m3 ,  = 0, c = 75...

Q: Refer to the retaining wall in Problem 15.1. Estimate

Refer to the retaining wall in Problem 15.1. Estimate the passive force, Pp, per unit length of the wall using Shields and Tolunay’s (1973) method of slices (Table 15.1).

Q: Refer to the retaining wall in Problem 15.1. Estimate

Refer to the retaining wall in Problem 15.1. Estimate the passive force, Pp, per unit length of the wall using Zhu and Qian’s (2000) method of triangular slices. Use Eq. (15.18).