Laserfiche WebLink
Procedure for the evaluation of liquefaction-induced lateral spreading displacements <br />' I <br />Site investigation Design Ground <br />with SPT or earthquake geometry <br />SPT data with Moment magnitude Geometric parameters <br />content ofearthquake (Mw)for each of different <br />or CPT data and peak surface zones in level (or <br />acceleration (arrox)gently sloping) ground <br />with (or withouO a free <br />face <br />¥ k- <br />Liquefaction potential analysis <br />to calculate FS, 041)60cs Or 4 4 <br />(*IN)cs Zones with three major Zones with <br />geometric parameters or more than <br />(using the NCEER SPT-less - free face height (H),three major <br />CPT-based method (Youd et al.the distance to a free face geometric <br />2001))(L), or/and slope (S)parameters <br />W <br />If <br />(NI»s < 14 <br />or <br />(qciN»< 70 <br />evaluate <br />potential <br />of <br />now <br />W <br />Calculation of the lateral <br />displacement index 1../H <br />or/and <br />(using Figure I and Equation [3]) S <br />W . <br />Estimated lateral displacement, LD <br />For gently sloping ground without a free face, <br />LD = (S + 0.20) · LDI (for 0.2% <S< 3.556) <br />For level ground with a free face, <br />LD =6· (UH)4: · LDI (for 5< IJH <40) <br />W <br />Evaluation of <br />lateral <br />displacements <br />based on <br />other <br />approaches <br />and <br />engineering <br />judgment <br />liquefaction <br />1 Flow chart illustrating rrejor steps in estimating liquefadion-induced lateral spreading d splacerrents using the proposed approach <br />60 <br />Z fzm0 50-LDI= 1 <br />ax <br />40 1 <br />SO56 <br />20 - <br />80% <br />0 <br />0.0 05 1.0 1.5 <br />7 maA <br />Jo <br />1 Equation [3] <br />2.0 <br />Factor of safety, FS <br />1 Figure 1 <br />NEstinating liquefaction-induced ground settlerrents from CPT for level ground", G Zhang, P. K Robertson, and R.W, I. Brachnen <br />Cliq v. 1.5.1.16 - CPT Uquefaction Assessment Software 52