The following method for estimating the post-liquefaction lateral displacements is incorporated into NovoCPT:

Zhang, Robertson and Brachman, 2004

This method is essentially based on estimating maximum cyclic shear strain of each layer during and after liquefaction which is estimated from safety factor against liquefaction (FS) and relative density of soil (Dr), When Dr can be correlated from CPT data based on the following equation (Tatsuoka et al.,1990):

 

Dr = - 85 + 76log(qc1N)       qc1N≤ 200

 

Figure 1 : maximum cyclic shear strain for post liquefaction

lateral displacement proposed by Zhang, Robertson and Brachman, 2004.

 

Then, the Lateral Displacement Index (LDI) is calculated from the following equation:

 

and according to site ground sloping, the lateral displacement is estimated. To read the complete procedure proposed by authors, please read the following paper from our website:


  Estimating Liquefaction-Induced Lateral Displacements Using the Standard Penetration Test or Cone Penetration Test
    G. Zhang; P. K. Robertson; and R. W. I. Brachman