A normally consolidated clay located below ground surface has 3 m thickness and void ratio of 1.1. Uniform load is acting on the ground surface = 40 kPa. Ave. effective stress at the top of clay = 56 kPa Ave. effective stress at the midpoint of clay 80 kPa %3D Pre-consolidation pressure = 130 kPa %3D Compression Index 0.45 %3D Swell Index =0.06 Compute the primary consolidation settlement. 150 mm 4 mm 20 mm

A normally consolidated clay located below ground surface has 3 m thickness and void ratio of 1.1. Uniform load is acting on the ground surface = 40 kPa. Ave. effective stress at the top of clay = 56 kPa Ave. effective stress at the midpoint of clay 80 kPa %3D Pre-consolidation pressure = 130 kPa %3D Compression Index 0.45 %3D Swell Index =0.06 Compute the primary consolidation settlement. 150 mm 4 mm 20 mm

Principles of Foundation Engineering (MindTap Course List)

8th Edition

ISBN:9781305081550

Author:Braja M. Das

Publisher:Braja M. Das

Chapter2: Geotechnical Properties Of Soil

Section: Chapter Questions

Problem 2.14P

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A stratum of clay is 2m thick and has an initial vertical effective stress of 50 KN/m2. The foundation load caused an increased pressure of 40 KN/m2 at the mid-layer of clay. Consolidation test revealed the following results: overconsolidation ratio (OCR) = 1.5 Compression index = 0.25 Recompression index = 0.05 Secondary compression index = 0.02 Initial void ratio = 0.90 Determine the following a. the primary consolidation settlement of the clay layer (in mm). b. If the primary consolidation settlement took 2 years to achieve in the field, calculate the secondary consolidation settlement after a period of 5 years (in mm). c. the preconsolidation pressure (in KPa. Note: Kindly give all right solutions with clear calculations.
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