Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Illustrates about the effect of wall movement on earth pressure?
Effect of wall movement on earth pressure
About fifty years ago Terzaghi conducted a series of tests on large scale model retaining walls to ascertain the variation of magnitude of earth pressures with the movement of the walls. While the wall is rigid and unyielding, no deformations and the soil mass are there in a state called earth pressure at rest. This is represented by the point A in figures (a). When the wail rotates about its toe, moving away from the soil as in figure (b), the soil mass expands, resulting in a decrease of earth pressure. Any element of soil will then behave just like a specimen in a tri-axial test in which the confining pressure is decreased while the axial stress remains constant. When the horizontal stress is decreased to a certain magnitude the full shear strength of the soil will be mobilised. No further decrease in the horizontal stress is possible even with further movement of the wall. This is called active earth force. This is represented by point B in the figure (a).
If the wall is pushed towards the wall as in figure (c) the soil is compressed and the soil offers resistance to this movement by shearing resistance. Any element of the soil can now be considered to be in the condition of a triaxial specimen being failed by increasing the confining pressure while holding the vertical stress constant. The horizontal $tress cannot be increased beyond a magnitude called passive stress. At this stress failure occurs arid the passive earth force is denoted by the point C in figure (a). Active and Passive earth pressures develop corresponding to two limiting slates of equilibrium. The soil mass is said to be in a state of plastic equilibrium ill these two stages. A small increase in stress at this stage will cause the plastic flow condition-a continuous increase in the corresponding strain.
Open system The system that exchange both the mass and energy (or Heat and work) with the surrounding of it. The mass within the system is necessarily constant. The nature of
Q. Safety considerations in multi-unit plants? Segregation of process units within large or multi-unit plants is necessary in order to reduce the risk of a fire spreading. This
Q. Design Safe Areas for plant? A Safe Area in this manual is regarded as a space that is not ranked as being a designated hazardous area by the relevant Regional or Country st
Argon - Hydrogen Mixtures Argon - hydrogen mixtures are employed in special cases, such as mechanised welding of light gauge stainless steel tubing, in which the hydrogen do
Q. What is Erosion Loss? Additional metal thickness must be added in specific locations where metal loss is expected, due to stream flow that is of high velocity, or is abrasiv
A rigid bar ABCD is hinged at A and supported by a bronze rod, 2m long, and a steel rod 1m long as shown in figure A load of 80 KN is applied at end B. Determine the stresses in ea
can you help me to do my project on machine design,it is specific project with calculation and some draw.
Battery Inspection : A fully charged and properly maintained battery is essential for proper lighting and starting of the motorcycle. STEPS Remove the right side cov
In mechanics, stress is a measure of the internal forces acting within a deformable body. Quantitatively, it is a measure of the average force per unit area of a surface within the
(a) What is cushioning effect of a tyre? (b) What are the desired properties of a wheel?
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd