1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Cut in slope

  1. Dec 13, 2017 #1
    1. The problem statement, all variables and given/known data
    In the notes , I cant understand that why as the pore water pressure dissipated , the shear strength of soil will decrease
    secondly , why the excess pore water pressure is negative when unloading occur ?
    2. Relevant equations

    3. The attempt at a solution
    I think it's wrong , as the pore water pressure dissipated , the shear strength of soil should increase , am i right ? This is because total stress = effective stress + pore water pressure stress , i assume shear stress = effective stress here . Correct me if i am wrong ...

    Attached Files:

    • 761.PNG
      File size:
      27.4 KB
    • 762.PNG
      File size:
      11.2 KB
    • 763.PNG
      File size:
      10.7 KB
  2. jcsd
  3. Dec 13, 2017 #2
    The pore pressure dropped to negative in the beginning of the cut , does it related to zone of capillary rise ? If yes ,. i cant relate it to the case of cut slope , can someone help ?
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted