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Showing 1 to 20 of 22 for “"Liquefaction Potential"”.
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AN ACOUSTIC METHOD FOR IDENTIFYING SAND FABRIC AND LIQUEFACTION POTENTIAL
… sand samples, and their related resistance to liquefaction. Three methods of preparation, that produced repeatably different preferred long grain axis orientations, were used to prepare laboratory samples (6.8" high by 2.7" in diameter) of a uniform, angular sand.</p><p>Acoustic signatures were …
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Liquefaction Potential of Unsaturated Nevada Sand Considering Different Intial Conditions
<p> It has been tacitly assumed that liquefaction does not occur in unsaturated soils during seismic events, because pore air behaves as a cushion and excess pore water pressure is difficult to accumulate. During recent earthquakes, some slopes composed of unsaturated soils experienced large …
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Evaluation of liquefaction potential of silty sand based on Cone Penetration Test
Liquefaction ls a phenomenon where a saturated soil can temporarily lose its shear strength during an earthquake as a result of the development of excess pore pressures. For the past 25 years since Iiquefaction phenomenon was first explained, it was thought to be mainly a problem with clean sand, …
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A Predictive Modeling Approach for Assessing Seismic Soil Liquefaction Potential Using CPT Data
<p>Soil liquefaction, or loss of strength due to excess pore water pressures generated during dynamic loading, is a main cause of damage during earthquakes. When a soil liquefies (referred to as triggering), it may lose its ability to support overlying structures, deform vertically or laterally, or …
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Application of Fatigue Theories to Seismic Compression Estimation and the Evaluation of Liquefaction Potential
Earthquake-induced liquefaction of saturated soils and seismic compression of unsaturated soils are major sources of hazard to infrastructure, as attested by the wholesale condemnation of neighborhoods surrounding Christchurch, New Zealand. The hazard continues to grow as cities expand into …
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Use of the mini-cone penetrometer for evaluating the liquefaction potential of sands associated with Charleston, S.C. seismic events
… accounts for the widespread occurrence of liquefaction related features in and near the meizoseismal zone. Recent geologic studies have found evidence for the repeated liquefaction of sandy soils in the Charleston area due to recurring large seismic events. In the course of this …
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Evaluating Liquefaction Triggering Potential from Induced Seismicity in Oklahoma, Texas, and Kansas
… Texas, and Kansas (OTK) over the last ten years. Liquefaction observed following the 3 September 2016, Mw5.8 Pawnee, OK, induced earthquake raises concerns regarding the liquefaction risk posed by future induced earthquakes. The stress-based simplified liquefaction evaluation procedure is widely …
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Seismic site response of deep soil and embankments in the New Madrid Seismic Zone
… seismic performance of embankments, and liquefaction potential analysis of shallow subsurface soils"--Introduction, pages 1-2.
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Seismic Response and Liquefaction of Saturated Sands
An analytical procedure is developed to study the liquefaction potential and seismic response of saturated sands. Method treats the saturated granular soil system as a two-phase nonlinear medium with constituent materials being the granular solid skeleton and the pore water. An elasto-plastic …
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The miniature electrical cone penetrometer and data acquisition system
… More recently, it has found application in liquefaction assessment. Typical cone penetrometers are heavy duty devices which are operated with the assistance of a drill rig. However, this capacity is not necessary in the case of field studies of liquefaction, since liquefaction usually occurs …
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Spatial Variation of Magnitude Scaling Factors During the 2010 Darfield and 2011 Christchurch, New Zealand, Earthquakes
… of strong ground shaking on the inducement of liquefaction within the simplified liquefaction evaluation procedure which is the most commonly used approach for assessing liquefaction potential worldwide. Within the context of the simplified procedure, the spatial variation in the seismic demand …
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A Numerical Investigation of the Seismic Response of the Aggregate Pier Foundation System
… (amax), 2) The aggregate pier reduces the liquefaction potential up to depth where it is installed, 3) Pore pressures are generally lower for soils reinforced with aggregate pier than unreinforced soils except for very strong earthquake, 4) The maximum shear stresses in soil are much …
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Moving Towards an Improved Liquefaction Hazard Framework: Lessons Resulting From the 2010-2011 Canterbury, New Zealand, Earthquake Sequence
… Zealand, Earthquake Sequence (CES) resulted in a liquefaction dataset of unprecedented size and quality, presenting a truly unique opportunity to assess and improve the efficacy of liquefaction-analytics in the field. Towards this end, the study presented herein develops and analyzes a database of …
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Numerical Modeling of Blast-Induced Liquefaction
A research study has been conducted to simulate liquefaction in saturated sandy soil induced by nearby controlled blasts. The purpose of the study is to help quantify soil characteristics under multiple and consecutive high-magnitude shock environments similar to those produced by large …
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Insights into the Liquefaction Hazards in Napier and Hastings Based on the Assessment of Data from the 1931 Hawke's Bay, New Zealand, Earthquake
… several earthquakes in the past during which liquefaction occurred. The 1931 Hawke's Bay earthquake is particularly interesting because it was the deadliest and one of the most damaging earthquakes in New Zealand's history. The study presented herein provides insights into the liquefaction …
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Wave induced response of sea floor deposits : a simple model for sands and nonlinear analysis by FEM
… on the susceptibility of the sand mass to liquefaction; for high values of permeability even a loose sand mass need not liquefy. This is in direct contrast to the commonly held view that the liquefaction potential is a function of density only. Two example cases are studied in detail. The …
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Seismic response of adjacent structures on dry and saturated sand
… An iconic example was the devastating effects of liquefaction in Christchurch, New Zealand, during the Canterbury earthquake in 2011. In the case of adjacent structures on liquefiable soil, the experimental evidence is even scarcer. The present work addresses the dynamic interaction between …
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Assessment of Seismic Hazards along the Northern Gulf of Aqaba
… hazards by determining the location and slip potential of active faults and by mapping areas of high liquefaction susceptibility. Ground Penetrating Radar (GPR) as a high resolution shallow geophysical tool was used to map the shallow active faults in Aqaba, Taba Sabkha area, and Elat. The GPR …
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Engineering properties and behavior of silty soils
… dissipation tests. Cyclic shear strength and liquefaction potential are investigated through a combination of laboratory testing and case history validation. A modified “Chinese criteria” is proposed based on the plasticity index and liquidity index, offering improved prediction of cyclic …
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