A developer plans to extend Bayview Haven residential estate in Darwin by constructing a 3.5mm fill platform over very soft mangrove silty clay soils. Borehole drilling indicates the very soft clay soils are 5m thick and underlain by rock of extremely low permeability, with the water table at the ground surface. Laboratory testing indicates the following geotechnical properties of the soils: Very Soft Silty Clay: Degree of saturation - 100%, Coefficient of Volume Compressibility (m.) - 0.85 MPa', coefficient of consolidation of clay (c.) = 2.5 m/yr; dry unit weight - 13 kN/m', moisture content - 38%. Compacted fill: bulk unit weight = 22 kN/m'. (a) Estimate the final consolidation settlement (s.) of the clay layer (b) Estimate the consolidation settlement after 14.5 months (c) How long will it take the silty clay layer to reach 90% consolidation, in years.
A developer plans to extend Bayview Haven residential estate in Darwin by constructing a 3.5mm fill platform over very soft mangrove silty clay soils. Borehole drilling indicates the very soft clay soils are 5m thick and underlain by rock of extremely low permeability, with the water table at the ground surface. Laboratory testing indicates the following geotechnical properties of the soils: Very Soft Silty Clay: Degree of saturation - 100%, Coefficient of Volume Compressibility (m.) - 0.85 MPa', coefficient of consolidation of clay (c.) = 2.5 m/yr; dry unit weight - 13 kN/m', moisture content - 38%. Compacted fill: bulk unit weight = 22 kN/m'. (a) Estimate the final consolidation settlement (s.) of the clay layer (b) Estimate the consolidation settlement after 14.5 months (c) How long will it take the silty clay layer to reach 90% consolidation, in years.
Traffic and Highway Engineering
5th Edition
ISBN:9781305156241
Author:Garber, Nicholas J.
Publisher:Garber, Nicholas J.
Chapter17: Soil Engineering For Highway Design
Section: Chapter Questions
Problem 22P
Related questions
Question
Transcribed Image Text:A developer plans to extend Bayview Haven residential estate in Darwin by constructing a 3.5mm fill
platform over very soft mangrove silty clay soils. Borehole drilling indicates the very soft clay soils are
5m thick and underlain by rock of extremely low permeability, with the water table at the ground
surface. Laboratory testing indicates the following geotechnical properties of the soils:
• Very Soft Silty Clay: Degree of saturation - 100%, Coefficient of Volume Compressibility (m.) -
0.85 MPa', coefficient of consolidation of clay (c.) = 2.5 m/yr; dry unit weight - 13 kN/m',
moisture content - 38%.
Compacted fill: bulk unit weight = 22 kN/m'.
(a) Estimate the final consolidation settlement (s.) of the clay layer
AM
(b) Estimate the consolidation settlement after 14.5 months
(c) How long will it take the silty clay layer to reach 90% consolidation, in years.
(d) If the silty clay has an overconsolidation ratio (OCR) of 1.5, what is the preconsolidation
pressure at the midpoint of the silty clay before the fill platform is constructed.
Expert Solution
Step by step
Solved in 10 steps
Knowledge Booster
Learn more about
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.Recommended textbooks for you
Traffic and Highway Engineering
Civil Engineering
ISBN:
9781305156241
Author:
Garber, Nicholas J.
Publisher:
Cengage Learning
Fundamentals of Geotechnical Engineering (MindTap…
Civil Engineering
ISBN:
9781305635180
Author:
Braja M. Das, Nagaratnam Sivakugan
Publisher:
Cengage Learning
Traffic and Highway Engineering
Civil Engineering
ISBN:
9781305156241
Author:
Garber, Nicholas J.
Publisher:
Cengage Learning
Fundamentals of Geotechnical Engineering (MindTap…
Civil Engineering
ISBN:
9781305635180
Author:
Braja M. Das, Nagaratnam Sivakugan
Publisher:
Cengage Learning