SIESMIC
Temporary loss of soil strength as water rises
What is liquefaction?
The vertical distance between the water surface and top of a structure.
What is freeboard?
The best piping material for seismic resilience
What is ductile iron?
The top priority during improvements and design
What is life safety?
A deep foundation member installed into the ground to support structures
What is a pile?
The plate subducting beneath the North American Plate
What is the Juan De Fuca plate?
The principle of having alternates, backups, or multiples of a process.
What is redundancy?
Types of movement that resilient joints allow for
What is translational and rotational?
The epicenter of the magnitude 6.9 1989 earthquake
What is Loma Prieta, CA?
The ground improvement method that strengthens weak soils by mixing them with cementitious binder
What is deep soil mixing?
The logarithmic scale used to measure the strength of an earthquake.
What is earthquake Moment Magnitude?
The first step when beginning design at a new site
What is geoetchnical assessment?
Items to stockpile in case supply chains fail during a seismic event
What is spare parts?
The most significant geotechnical hazard in major US earthquakes
What is liquefaction?
Pressure exerted by water within the void spaces of a soil
What is pore pressure?
The area associated with the greatest seismic risk in the PNW
What is the coast?
The discipline where seismic design is typically the responsibility of the subcontractor.
What is electrical?
Where you should avoid burying pipe
What is seismically vulnerable areas?
The geotechnial solution used by Hazen at Sammamish Plateau Wells
What is soil removal and replacement?
Uneven downward movement of a structure beneath different parts of the foundation.
What is differential displacement?
The type of energy stored by deforming plates
What is elastic energy?
Water movement resulting from seismic movement. Clarifiers are particularly vulnerable.
What is sloshing?
The purpose of isolation valves and redundant lines
What is backup during pipe failure?
The joint shape that experienced significant breakage in the Loma Prieta earthquake
What is bell and spigot joints?
Discipline to consult if Hazen wants to build a clarifier on top of liquifiable soil.
What is ask a geotechnical engineer?