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.
Tungsten Inclusions Tungsten inclusion is a discontinuity found only in TIG welding. Particles of tungsten from the electrode can be embedded in a weld when improper welding proc
A lifting shackle in a glass-making factory is made from a special high-temperature stainless steel. It is expected that the shackle will experience a tensile load of 5kN and th
A gear drive is needed to transmit a maximum power of 22.5KW. The velocity ratio is 1:2 and r.p.m. of the pinion is 200. The centre distance between the shafts can be taken as 600m
what is mean by precipitation hardening?
The input-output curve of a 60 MW power station is provided by : I = 10 6 [8 + 8L + 0.4L 2 ] Kcl/hour where I is the input in the Kcal/hour and L is the load in MW. (a) Ev
Find out Deflection under the load: A beam of span 4 m is subject to a point load of 20 kN at 1 m from the left support and a Udl of 10 kN/m over a length of 2 m from the righ
what is soundness of casting.
CIM in architecture?
APPLICATIONS
State and prove parallelogram law forces
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: +1-415-670-9521
Phone: +1-415-670-9521
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd