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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In the soil profile shown below, if the water table changes from level WT0 to level WT1 permanently, what is the change in the ground surface elevation in mm in the long term after primary consolidation is completed? Assume that the clay layer is initially normally consolidated. Use a single clay layer in your calculations and positive value for settlement. (Acceptable tolerance = 4%)
A singly drained clay deposit 10 meters thick has a coefficient of consolidation of 2.0 x 10-4 cm2 / s. A settlement analysis based on consolidation tests predicted an ultimate consolidation settlement under the applied load in the field to be 0.95 meters.
a) How long would it take, in years, for a settlement of 35 cm to occur?
b) How much settlement, in millimeters, would you expect to occur in 5 years?
For normally consolidated clay layer in the field, the ff. values are given: Thickness of clay layer = 8.5ft, Void Ratio = 0.8; Compression Index = 0.28; Average effective pressure on the clay layer is 2650 lb/ft2; ∆σ = 970 lb/ft2; Secondary Compression index = 0.02. What is the total consolidation settlement of the clay layer five years after the completion of primary consolidation settlement? Time for completion of primary settlement = 1.5 years)
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
- For a given over consolidated clay: Specific gravity = 2.71 , Liquid limit = 45, In situ average effective over burden pressure = 120 kPa ,In situ void ratio = 0.80, Thickness of clay layer = 4m , ∆P = 40 kPa, Effective pressure at the mid – height of clay layer = 60 kPa , Swell index (Cs) = 1/5 Cc1.) Compute the compression index. 2.) Compute the pre – consolidation pressure. 3) Compute the primary consolidation settlement.arrow_forwardGiven the following data for the normally consolidated clay layer in the field. Compute the primary consolidation settlement. Thickness of clay layer= 3.0m Cc= 0.30 e= 0.70 Overburden pressure= 250 Kpa ΔP= 46 kPa Cα= 0.022arrow_forwardQ 8.7 If the coefficient of consolidation for the clay layer in problem 8.3 is 0.0018 cm^2/Sec, how long will it take for 60% primary consolidation to take place? What will be the total compression due to consolidation at that time?arrow_forward
- A buried clay layer 10 ft thick is sandwiched between strata of free-draining granular soil so that double drainage during consolidation can occur. Calculations indicate that, because of a planned building loading, an ultimate settlement of 2 in. is expected as a result of primary compression in the clay layer. The coefficient of consolidation for the clay is 0.01 ft2/day. (a) How long will it take for 90 percent of the estimated settlement to take place?(b) How much settlement will occur in one year?(c) How long will it take for 1 in. of settlement to take place?arrow_forwarda. Calculate the degree of consolidation of a 6 m thick double drained clay layer after 4862 days since initial loading. The coefficient of consolidation is 1.06 X 10-6 m2/min. b. For the same clay layer, how much time would it take to reach 30% consolidation, if drainage existed on only one boundary?arrow_forwardTime required for settlement of clay layer for double drainage system if time factor and consolidation coefficient is givenarrow_forward
- A 3-m-thick layer (two-way drainage) of saturated clay under a surchargeloading underwent 90% primary consolidation in 75 days. Find the coefficientof consolidation of clay for the pressure range.arrow_forwardQ#2: (a). What is consolidation? Explain the concept of NCR and OCR with examples in your own words. (b). The results of a consolidation test on an undisturbed soil sampled at a depth of 10m below the Ground level are as follows: ϒsat = 16KN/m3, Pre consolidation pressure =90 KPA, ϒw = 10KN/m3. Calculate the over consolidation of soil and Type of consolidation soil.arrow_forward
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