For a falling-head permeability test, the following are given: length of specimen = 380 mm area of specimen = 6.5 cm2 k = 0.175 cm/min What should be the area of the standpipe for the head to drop from 650 cm to 300 cm in 8 min?

For a falling-head permeability test, the following are given: length of specimen = 380 mm area of specimen = 6.5 cm2 k = 0.175 cm/min What should be the area of the standpipe for the head to drop from 650 cm to 300 cm in 8 min?

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

For a falling-head permeability test, the following are given:
length of specimen = 380 mm
area of specimen = 6.5 cm2
k = 0.175 cm/min
What should be the area of the standpipe for the head to drop
from 650 cm to 300 cm in 8 min?

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