Answered: Why is pore pressure negative within…

Why is pore pressure negative within the zone of capillary rise? Why would the actual pore pressure be affected by the degree of saturation of the soil? Explain thoroughly.

Principles of Geotechnical Engineering (MindTap Course List)

9th Edition

ISBN:9781305970939

Author:Braja M. Das, Khaled Sobhan

Publisher:Braja M. Das, Khaled Sobhan

Chapter11: Compressibility Of Soil

Section: Chapter Questions

Problem 11.15P

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Concept explainers

Principles of Seepage

In hydrology, when water flows down in a pore or crack of unsaturated soil due to gravity, the deep layer of soil is called seepage. It is the slow movement of water in the soil layer. Seepage is mainly found near hydraulic structures and is responsible for the stability of earthen-type hydraulic structures.

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A uniform soil has 10% passing the 0.425 mm sieve.a. What type of soil is it?b. Estimate the permeability.c. If the average pore/void diameter is 20% of the effective size, find the height of thecapillary rise.d. Would this soil cause serious frost heaving? Why?
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