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Civil Engineering

plication of load increment. How many months will be required to reach a settlement of 8 cm ? Assu

Principles of Foundation Engineering (MindTap Course List)

9th Edition

ISBN:9781337705028

Author:Braja M. Das, Nagaratnam Sivakugan

Publisher:Braja M. Das, Nagaratnam Sivakugan

Chapter2: Geotechnical Properties Of Soil

Section: Chapter Questions

Problem 2.22P

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Concept explainers

Sediment transport

Sediment transport or Soil transport is the movement of solid particles, usually due to the combination of gravitational forces acting on the sediment, and the movement of the liquid at which the sediment enters. Soil erosion occurs in natural systems where the particles are sandstones (sand, rocks), mud, or clay; the liquid is air, water, or ice; and the gravitational force that works to move particles to the landing surface. Sediment transportation or soil migration due to the movement of liquids occurs in rivers, lakes, lakes, oceans, and other bodies of water as a result of currents and waves. Transportation is also caused by glaciers as they flow, and to places on earth under the influence of wind. Soil erosion due to gravity alone is possible in most sloping areas, including hills, scarves, cliffs, and the continental shelf — the continental boundary of the slope.

Question

A clay layer, whose total settlement under a given loading is expected to be 16 cm
settles 4 cm at the end of 1 month after the application of load increment. How many
months will be required to reach a settlement of 8 cm ? Assume to have double
drainage

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How long will it take for 50% of the total settlement to occur in laboratory specimen of the clay tested in a conventional consolidation oedometer, if the specimen is 6.35cm in diameter and 2.54 cm thick? Cv=0.25 m2/day. 33sec 55sec O 66sec 44 sec
‹ample 9.1: Following results were recorded from a consolidation test on a specime turated clay, each load being maintained constant for 24 hours before the addition o ext increment.
11.12 A 2-m clay layer in the field has a current effective stress, oó= 70 kN/m?. There is a net stress increase, Ao = 180 kN/m², due to a foundation load. Calculate the expected primary consolidation settlement. The results of a consolidation test on the clay are given below. o' (kN/m) 0.98 12 0.94 50 0.82 200 0.73 400 ©Cngage lamng 2014
4. Calculate the total settlement of two clay layers? The two clay samples at Location A and Location B were collected and analyzed. Use information at Location A to estimate the settlement at the stiffy silty clay. Use information at Location B to estimate the settlement at the very stiff clay. Compression index C, at point A is 0.25, C, at point B is 0.2. Swelling index C, at point A is 0.08, C, at point B is 0.06. Initial void ratio eo at point A is 0.66, eo at point B is 0.45. Maximium vertical stress cat point A is 101 kPa, at point B is 510 kPa. The 8.5 m thick proposed fill generated a increase of vertical stress = 20.3x8.5 = 172.55 kPa. 8.5 m 2.0 m 3 m 7.0m 4 m 4 mⒸ 4 m5 18.0m 5 mo 5 m Proposed Fill y=20.3 kN/m² y-18.3 kN/m² 7-19.0 kN/m² y-19.5 kN/m² 4.0 Stiff Silty Clay (CL) 10.0 Very Stiff Clay (CL) Glacial Till
A 5.1 m thick clay soil with a current overburden pressure of 89 kPa is going to experience an additional stress of 89 kPa after a new structure is built. If it was determined that the clay is normally consolidated has an initial void ratio of 1.2, a recompression index of 0.07, and a compression index of 0.47. Determine the total amount of settlement that is expected to occur. Provide your answer in meters to 3 decimal places.
What is the relative density of a sand in a certain locality being tested at 98% standard proctor with minimum wt of 14.0 kN/m3 and maximum wt of 18.8kN/m3?
the results of a consolidated undrained test, in which o3 = 392 kN/m?, %3D on a normally consolidated clay are given next: Axial Strain, % Ao, kN/m2 Ud, kN/m? 0.5 156 99 0.75 196 120 1 226 132 1.3 235 147 2 250 161 3 245 170 4 240 173 4.5 235 175 Draw the kf line in a p' vs q' diagram. Also draw the stress path for the test in the diagram.
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Explain the Correlations for Undrained ShearStrength (cu), Preconsolidation Pressure (standard deviation'c),and Overconsolidation Ratio (OCR) for Clays ?
Geotechnical