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Huge landslide at La Conchita, 1995. A geologic hazard or geohazard is an adverse geologic condition capable of causing widespread damage or loss of property and life. [1] These hazards are geological and environmental conditions and involve long-term or short-term geological processes.
Risk assessment determines possible mishaps, their likelihood and consequences, and the tolerances for such events. [1] The results of this process may be expressed in a quantitative or qualitative fashion. Risk assessment is an inherent part of a broader risk management strategy to help reduce any potential risk-related consequences. [1] [2]
The sand equivalent test quantifies the relative abundance of sand versus clay in soil. It is measured by standardized test methods such as ASTM D2419, AASHTO T176, and EN 933–8. [ 1 ] The test is used to qualify aggregates for applications where sand is desirable but fines and dust are not.
FAA Order 8040.4 establishes FAA safety risk management policy. The FAA publishes a System Safety Handbook that provides a good overview of the system safety process used by the agency. IEEE 1584-2002 Standard which provides guidelines for doing arc flash hazard assessment.
The slope stability probability classification (SSPC) [19] [20] system is a rock mass classification system for slope engineering and slope stability assessment. The system is a three-step classification: ‘exposure’ , ‘reference’ , and ‘slope’ rock mass classification with conversion factors between the three steps depending on ...
The 2011 earthquake caused a layer of water and fine sand to collect on the surface of this street. Soil liquefaction occurs when a cohesionless saturated or partially saturated soil substantially loses strength and stiffness in response to an applied stress such as shaking during an earthquake or other sudden change in stress condition, in ...
Bridge scour is the removal of sediment such as sand and gravel from around bridge abutments or piers. Hydrodynamic scour, caused by fast flowing water, can carve out scour holes, compromising the integrity of a structure. [1] In the United States, bridge scour is one of the three main causes of bridge failure (the others being collision and ...
A sieve analysis (or gradation test) is a practice or procedure used in geology, civil engineering, [1] and chemical engineering [2] to assess the particle size distribution (also called gradation) of a granular material by allowing the material to pass through a series of sieves of progressively smaller mesh size and weighing the amount of material that is stopped by each sieve as a fraction ...