1. Under normal loading condition, a 3.6 m thick clay (normally consolidated) has P, = 190 KPa and e, =1.22. A surcharge of 190 KPa reduces its void ratio to 0.98. The hydraulic conductivity of the clay for the loading range is 6.1 x 10ʻ m/day. a. What is the coefficient of volume compressibility of the clay? b. What is the coefficient of consolidation of the clay? c. How long will it take for this clay layer to reach 60% consolidation if it is drained on one side only?

Q: The relationship between the specific gravity of sand (G) and the hydraulic gradient (i) to initiate…

A: Porosity n=30%=0.30   It is needed to find the relationship between specific gravity G &…

Q: 9. A cubic meter of a saturated, normally consolidated clay has a dry mass of 4 kg and a porosity of…

A: Since we know that                 Void ratio (e) = Porosity1- porosity = n1-n Here porosity (n) =…

Q: consolidated clay located below ground surface has 3 m thickness and voic Uniform load is acting on…

A: Uniform load acting = 40 kpapre-consolidation pressure= 130 kpacompression index= 0.45swell index =…

Q: The relationship between the specific gravity of sand (G) and the hydraulic gradient (i) to initiate…

A:

Q: 3. A 405 cm³ volume of fully saturated clay weights 8.1 N and the specific gravity of the solids is…

A:

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.