StudentShare
Contact Us
Sign In / Sign Up for FREE
Search
Go to advanced search...

Triaxial undrained test - Essay Example

Cite this document
Summary
A triaxial shear test is commonly used in order to measure the mechanical properties of many deformable solids such as soil, rock or any other granular materials and powders. A number of different methods are available to carry out this test (Bardet, 1997).
The results obtained…
Download full paper File format: .doc, available for editing
GRAB THE BEST PAPER92.6% of users find it useful
Triaxial undrained test
Read Text Preview

Extract of sample "Triaxial undrained test"

Download file to see previous pages

In turn the values from this graph as well as the resulting Excel sheets were used to determine the maximum deviator stress for each sample under investigation. The maximum deviator stress and the relevant cell pressure for all three samples are shown in the table below. The calculation was carried out relying on the test equipment that produced values for measured force using a load cell calibration constant. The calibration constants for all three samples are presented in the table below. The highest value of corrected stress was taken from this graph and the tables and was plotted in the form of Mohr’s circles.

Once the Mohr’s circles were drawn, they were connected together using a common tangent. This tangent is critical to the calculations required as the y-intercept represents cohesion while the inverse of the gradient of the tangent represents the internal friction angle of the soil. The plot of Mohr’s circles and the resulting graph is shown below. Using the plot shown above the y-intercept and the angle that the tangent made with the horizontal were calculated. The y-intercept was 306.68 while the angle of the tangent with the horizontal was 3.

62 degrees. Once this was found, it was time to find out the void ratio and the degree of saturation. This was done with the help of the taken weights (which are shown in the table below for all samples) and with the use of the formulas shown after them. The results obtained from the Mohr plot indicate that the soil has a high cohesion (306.68 kN/m2) but a small angle of friction (15.81 degrees). In turn this can be used to surmise that the soil sample under investigation has relatively good shearing properties although it is prone to failure if the angle of repose is increased by a large amount.

The other thing to take note of is whether the soil sample under investigation has been packed

...Download file to see next pages Read More
Cite this document
  • APA
  • MLA
  • CHICAGO
(“Triaxial undrained test Essay Example | Topics and Well Written Essays - 1250 words”, n.d.)
Triaxial undrained test Essay Example | Topics and Well Written Essays - 1250 words. Retrieved from https://studentshare.org/engineering-and-construction/1591323-triaxial-undrained-test
(Triaxial Undrained Test Essay Example | Topics and Well Written Essays - 1250 Words)
Triaxial Undrained Test Essay Example | Topics and Well Written Essays - 1250 Words. https://studentshare.org/engineering-and-construction/1591323-triaxial-undrained-test.
“Triaxial Undrained Test Essay Example | Topics and Well Written Essays - 1250 Words”, n.d. https://studentshare.org/engineering-and-construction/1591323-triaxial-undrained-test.
  • Cited: 0 times

CHECK THESE SAMPLES OF Triaxial undrained test

Triaxial method

In a situation where the rate of construction is slow and allows the soil to consolidate this test is not required.... Appropriate ASTM test methods must be followed when performing tests of materials.... The common tests applied in geotechnical investigation are; Standard test Method for Direct Shear test of Soils Under Consolidated Drained Conditions ASTM 3080, Standard test Method for Unconsolidated-Undrained Triaxial Compression test on Cohesive Soils ASTM 2850, Standard test Method for Unconfined Compressive Strength of Cohesive Soil ASTM 2166, Standard test Method for Consolidated-Undrained Triaxial Compression test for Cohesive Soils ASTM 4767 and Standard test Method for One-Dimensional Consolidation Properties of Soils ASTM D 2435....
1 Pages (250 words) Lab Report

Soil mechanics

Conventional test entails a cylindrical soil sample which is subjected to radial stresses as well as axial displacement or controlled increases in axial stresses.... An investigation into the proposed construction of a new building on the land that will produce a load of 1500kN/m2 ....
5 Pages (1250 words) Lab Report

The use of undrained triaxial test

The major purpose of the report “The use of undrained triaxial test” was to explore the use of undrained triaxial test on studying the mechanical properties of soil.... In studying deformable solids, such as soil, the need for triaxial test arises especially when measuring the mechanical properties....
3 Pages (750 words) Lab Report

Critical State Soil Mechanics

The key laboratory tests that can be used in the estimation of critical state parameters are the triaxial (axial symmetry) test and simple or direct shear test.... These test samples should have a consolidation, which is related to the effective pressure at the onset of the tests (Joseph 2009).... Further, drained isotropic unloading and loading aids in the determination of l and k in the apparatus of triaxial.... Hence, different tests (triaxial extension, triaxial compression) offer different M values while l varies with respect to the unloading degree or stress level....
3 Pages (750 words) Assignment

Historical Development of the Equations Used for the Design of CFA Piles in Granular Soils

"Historical Development of the Equations Used for the Design of CFA Piles in Granular Soils" paper argues that soil stress seems to reduce or stay at the initial rate in the vicinity of excavation of a pile.... When installing a driven pile, the process involved displaces the soil vertically.... hellip; The team that performs the process hazards analysis will take the compiled safety information as very vital and very important....
7 Pages (1750 words) Essay

Laboratory Testing and Equipment

The commonly used in – situ method in the determination of the shear strength of the soil is the standard penetration test (Craig).... standard penetration test is an in-situ geotechnical test used in the determination of soil shear strength.... Also, the test is used in checking the stony cohesive soils and weak rocks for consistency.... The standard penetration test can be used on all types of soils....
12 Pages (3000 words) Research Paper

Importance of the Triaxial Experiment

The triaxial test is highly reliable since both the undrained and drained shear strengths are measured.... he objective of the experiment, the triaxial test, was out the material's angle of shearing, that is, or t; and the undrained shearing strength, which is represented by cu via the consolidated undrained triaxial test.... The triaxial test is done in the cell and is usually named as such since there are three principal stresses that are applied to any soil sample....
9 Pages (2250 words) Lab Report

Soil Elastic Modulus Measurement Using Triaxial Test

"Soil Elastic Modulus Measurement Using Triaxial test" paper argues that the elastic modulus and soil stiffness depend on the consistency and density of the given soil under investigation.... nbsp;… The triaxial test is a procedure performed in most laboratories; the test is used to determine the shear strength parameters for a variety of soil types under different conditions.... nbsp; The basic concept applied in performing the triaxial shear test is that when stress is applied in the vertical direction along the axis of a cylindrical sample the resulting stress is different from stresses applied in the horizontal direction perpendicular to the sides of the cylindrical sample (BISHOP and HENKEL, 1962, p....
8 Pages (2000 words) Coursework
sponsored ads
We use cookies to create the best experience for you. Keep on browsing if you are OK with that, or find out how to manage cookies.
Contact Us