An unaisturbed sample of clay, 24 mm in thickness, consolidometer. The total change in the thickness of the specimen in 4.74 mm when the 2pplied pressure is 200 kN/m² and 6.13 mm when the applied pressure is 400 kN/m. On reducing the pressure to zero, the specimen swells to a thickness of 18.50 mm. The final water content of the specimen is 32.6% and specific gravity is 2.72. The clay stratum, 1 m thick, is sandwiched between pervious strata, and is subjectea co an overburden pressure of 200 kN/m². Estimate the probable settlement of a proposed structure, if due to its construction, the effective pressure at the centre of the clay layer

An unaisturbed sample of clay, 24 mm in thickness, consolidometer. The total change in the thickness of the specimen in 4.74 mm when the 2pplied pressure is 200 kN/m² and 6.13 mm when the applied pressure is 400 kN/m. On reducing the pressure to zero, the specimen swells to a thickness of 18.50 mm. The final water content of the specimen is 32.6% and specific gravity is 2.72. The clay stratum, 1 m thick, is sandwiched between pervious strata, and is subjectea co an overburden pressure of 200 kN/m². Estimate the probable settlement of a proposed structure, if due to its construction, the effective pressure at the centre of the clay layer

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Concept explainers

Field applications of hydraulic conductivity

Hydraulic conductivity is one of the hydraulic properties of soil defined as a measurement of the ability of a porous medium to permit water movement or fluid flow through it. It is denoted by the letter K. It is influenced by the density and viscosity of the fluid. It is also called permeability. Hydraulic conductivity is defined as the ratio of velocity to the hydraulic gradient. The different methods used to determine the hydraulic conductivity are laboratory methods (constant head permeability tests and falling head tests), in-situ field methods (pumping in and pumping out tests), small scale field tests (infiltration tests and slug tests), and indirect methods such as estimation from grain size, consolidation test data, and horizontal capillary test. The pedotransfer function (PTF) method is a specific empirical estimating approach employed in the soil sciences is also used to determine the hydraulic conductivity of the soil.

Question

An undisturbed sample of clay, 24 mm in thickness, is tested in a
consolidometer. The total change in the thickness of the specimen in 4.74 mm when the
applied pressure is 200 kN/m² and 6.13 mm when the applied pressure is 400 kN/m. On
reducing the pressure to zero, the specimen swells to a thịckness of 18.50 mm. The final
water content of the specimen is 32.6% and specific gravity is 2.72.
The clay stratum, 1 m thick, is sandwiched between pervious strata, and is subjected
to an overburden pressure of 200 kN/m². Estimate the probable settlement of a proposed
structure, if due to its construction, the effective pressure at the centre of the clay layer
is expected to be increased to 400 kN/m². don't try to solve this question, otherwise

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