1018 14TH ST 2023-02-09 - Laserfiche WebLink

Port of Everett SHANNON&WILSON,INC. Attn: Mr. Erik Gerking April 16, 2013 Page 3 of 5 ■ Gazetas,Dakoulas,and Dennehy (1990): This paper uses the field performance of 75 anchored sheet pile quay walls to develop a plot that can be used to estimate the degree of damage during a seismic event. The estimation is based on the wall geometry,the soil characteristics, and the intensity of seismic shaking. Using the equations and figures presented in the paper for the project site,the predicted displacement of the wall is about one foot. ■ McCullough and Dickenson (1998): This paper compares the degree of ground improvement behind a bulkhead wall to lateral movement due to a seismic event. The method is based on the ground motion intensity of the earthquake, the wall stiffness,the soil characteristics, and the geometry of the wall system. We used the equations and charts in the paper and assumed zero ground improvement and estimated a permanent horizontal displacement of about two feet. The following photographs from the 1995 Kobe earthquake (Magnitude 6.9)represent examples of the type of damage that correspond to liquefaction induced settlement and several feet of lateral spreading: ` 4" r � t i ter.