Foundation Design: Principles and Practices (3rd Edition)
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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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 19.5 kN/m 3 . Compute the ultimate consolidation settlement.

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

Figure 3.21

Soil profile for Problem 3.11.

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For the soil profile given below, assume that the primary consolidation settlement for the clay layer is completed in 3 years. Estimate the secondary consolidation settlement for the clay layer at the end of 10 years. Yw= 10kN/m³, Ca= 0.03 1m 1.5m 2m BxL= 2m x 4m Groundwater table 0.5m 90 = 100kPa Sand y = 17.0 kN/m³ Sand Ysat 19.0 kN/m³ a retaining wall are shown in Normally consolidated Clay Ysat 20 kN/m³ eo = 0.7 Cs=0.09 Cc = 0.2
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
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.

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