Foundation Design: Principles and Practices (3rd Edition)
3rd Edition
ISBN: 9780133411898
Author: Donald P. Coduto, William A. Kitch, Man-chu Ronald Yeung
Publisher: PEARSON
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Textbook Question
Chapter 3, Problem 3.11QPP
A 2m thick fill is to be placed on the soil shown in Figure 3.21. Once it is compacted, this fill will have a unit weight of
Figure 3.21
Soil profile for Problem 3.11.
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THE FIGURE SHOWS A SOIL FORMATION OF 5M SAND AND 6M CLAY. THE GROUNDWATER TABLE IS 4M BELOW THE GROUND SURFACE. IF A FILL WITH A UNIT WEIGHT OF 17KN/M3 AND A HEIGHT 2M IS PLACED ON THE GROUND, FIND:
A. THE PRIMARY CONSOLIDATION SETTLEMENT OF THE CLAY LAYER IF IT IS NORMALLY CONSOLIDATED WITH A COMPRESSION INDEX OF 0.38 AND A VOID RATIO OF 1.52.B. THE TOTAL CONSOLIDATION SETTLEMENT OF THE CLAY 5 YEARS AFTER THE COMPLETION OF PRIMARY CONSOLIDATION SETTLEMENT. TIME FOR COMPLETION OF PRIMARY SETTLEMENT IS 2 YEARS. SECONDARY COMPRESSION INDEX IS 0.02
B.)
A 10 m thick clay layer with single drainage settles 10 cm. in 5 year. The
coefficient of consolidation (C) for this clay was found to be 0.544x102 cm²/s.
Compute the ultimate consolidation settlement and find out how long it will take
to settle to 60% of this amount.
Soil consolidation
Chapter 3 Solutions
Foundation Design: Principles and Practices (3rd Edition)
Ch. 3 - Explain the difference between moisture content...Ch. 3 - A certain saturated sand has a moisture content...Ch. 3 - Consider a soil that is being placed as a fill and...Ch. 3 - A sample of soil has a volume of and a weight of...Ch. 3 - A site is underlain by a soil that has a unit...Ch. 3 - The sub-surface profile at a certain site is shown...Ch. 3 - A vertical load of 300 kN is applied to a area at...Ch. 3 - A vertical load of 20 k is applied to a area at...Ch. 3 - 3m3m footing is to be built on the surface of a 15...Ch. 3 - A 3 ft square footing carries a sustained load of...
Ch. 3 - A 2m thick fill is to be placed on the soil shown...Ch. 3 - Estimate the effective friction angle of the...Ch. 3 - Explain the difference between the drained...Ch. 3 - A soil has c=5 kPa and =32. The effective stress...Ch. 3 - A footing with an embedment of 2 m is embedded in...Ch. 3 - Prob. 3.16QPPCh. 3 - Prob. 3.17QPPCh. 3 - A 9 ft thick fill is to be placed on the soil...
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, civil-engineering and related others by exploring similar questions and additional content below.Similar questions
- 10.17 A 4.0 m thick fill is to be made of a soil with a Proctor maximum dry unit weight of 19.4 kN/m² and an optimum moisture content of 13.0%. This fill will be compacted at optimum moisture content to an average relative compaction of 92%. The underlying soils are as shown in Figure 10.26. Consolidation tests were performed at Points A and B, with the following results: Sample A Сс 0.59 Cr ୧୦ 0.19 1.90 σ (kPa) 75 B 0.37 0.14 1.21 100 The silty sand is normally consolidated. Using hand computations, determine the ultimate consolidation settlement due to the weight of this fill.arrow_forwardShow solution. The answer must be 8.22 x10^-10 ft/secarrow_forwardThe results of a laboratory consolidation test on a clay sample are given below: Pressure, p (kN/m²) Void ratio, e 23.94 1.112 47.88 1.105 95.76 1.080 191.52 0.985 383.04 0.850 766.08 0.731 (43) a) Draw an e-log p plot. (44) b) Determine the pre-consolidation pressure, p. . (45) c) Find the compression index, Ce. Appendix For ø=35°, N¸=57.8, N,=41.4, and N,=41.1. o,'=0;'tan²| 45°+ +2c tan| 45°+arrow_forward
- Consolidation of Settlemintarrow_forward8.5 m compacted fill is to be placed over the soil profile. Consolidation tests are done on samples from point A and point B and produce the following results. Compute the ultimate consolidation settlement due to the weight of this fill in INCHES.arrow_forwardFigure 10.26 is the profile at the bottom of the picturearrow_forward
- For a normally consolidated clay layer in the field, the following values are given: Thickness of clay layer = 8.5 ft ● Void ratio = 0.8 ● ● ● ● Compression index (CC) = 0.28 Average effective pressure on the clay layer is 2650 lb/ft² Additional Overburden Pressure is 970 lb/ft² Secondary compression index (Ca) is 0.02 Determine the total consolidation settlement considering primary and secondary settlement. Select the correct response: 2.6425" 2.5631" 2.8866" 2.3856"arrow_forwardConsolidation of Settlemintarrow_forwardQ: For the soil profile shown in figure. Find: a) Final consolidation settlement. b) Time required for 60% consolidation. c) Pore water pressure after 18 months. d) Piezometer reading above point (A) immediately after applying the load. Surcharge Aq.= 100 kPa Sand y=15kN/m’ 7kN/ m® Piezometer t AT ol g thefity iarrow_forward
- Consolidation of Settlemintarrow_forwardRefer to Figure P2.18. A total of 60 mm consolidation settlement is expected in the two clay layers due to a surcharge of Δσ. Find the duration of surcharge application at which 30 mm of total settlement would take place.arrow_forwardTwo identically clay samples of the same size designated as A and B are subjected to consolidation under identical conditions. Drainage takes place through one face in sample A and through both the faces in sample B. 50% consolidation of sample A occurs in 10 minutes. The time required for 50 % consolidation to occur in sample B in minutes will be. (a) 40 (c) 5 (b) 10 (d) 2.5arrow_forward
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