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.
I require design procedure of Conjugate Cams
The rigidly jointed frame shown in Figure has bending stiffnesses such that EI AB = 1000kNm 2 and EI BC = EICD = 1600kNm 2 . (i) Determine the joint rotations at B and C.
Q. Show the Limitations of Rigid bed models? Due to vertical exaggeration, model slope automatically becomes steeper than in the prototype, this slope exaggeration being the sa
Classification Two categories of plastics are identified. Those are: thermosetting plastics and thermoplastics. Plastics generally cannot stand higher temperatures. They becom
Is there a metal that does not contain iron? Ans) Most commercially available aluminum having some other materials, but only accidental traces of iron, if any. For example, Copp
Which conducts heat faster steel copper or brass? Ans) Copper conducts heat faster than steel or brass. Any material that is good for conducting heat is also good for electricit
General Resource Models In computer controlled scheduling, material, machine handling equipment, tooling and buffer space should be comprised. The explicit consid
Thin wall round tube has diameter of 60mm. The end of it will be compressed to square for. How many percents torsion strenght will become lower at the end tube?
Stress Distribution in Beams: 1. learn the section modulus of beams of several cross section. 2. found the normal force for partial beam section & its moment around the neu
Resultant of coplanar concurrent force system: The resultant force, of given system of forces can be found out by the resolution method, which is discussed below: Assume th
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