The Soil-Rock Boundary: What is it and Where is it?
A major issue in many areas of Civil Engineering practice is the boundary between earth materials that are defined as soil and those that are defined as rock. Designers, contractors, and...
Special Bedrock Conditions in Greater Boston
The Cambridge Argillite, a weakly metamorphosed shale, forms the major portion of the Boston Basin, a structural as well as topographic depression. In the greater Boston area, the argillite...
Where Does Rock Begin for Three Highway Projects?
'Where does rock begin?' was a question raised on three large highway projects in the western United States. The question was successfully answered by a variety...
Ground Stabilization in Shallow Depth Soft Ground Tunneling
A new approach was employed for ground stabilization to drive a semi-circular cross-section tunnel with overall dimensions of 24 ft (7.3m) wide, 12 ft (3.7m) high, and 164 ft (50.0m) long....
Recent Advances in Cone Penetrometer Measurements (Software and Hardware) and Its Application to Liquefaction Susceptibility
Some of the recent advances made in Cone Penetration Test (CPT) data acquisition system and real time processing of CPT data are presented. A key component of the new CPT data acquisition...
In-Situ Calibration of USGS Piezometer Installations
Among the few potentially liquefiable sites around the world that have been permanently instrumented with pore-pressure transducers and accelerometers, only the Wildlife Site in the Imperial...
Electronic Data Acquisition and Analysis for Soil Dynamics Applications
Recent advances in micro-computer-based data acquisition hardware and software systems have created a window of opportunity for the soil dynamics specialist. Increases in the number of...
Use of Bender Elements in Soil Dynamics Experiments
Transducers employing piezoelectric bender elements have been found to be versatile sources and receivers of small-amplitude shear waves, with multiple potential applications. The constitutive...
Use of Piezoceramic Bender Elements in Soil Dynamics Testing
The use of piezoceramic bender elements is described to measure small strain, shear wave velocity distributions in soil models used in centrifuge and shake table testing. Experimental...
Tension Bending Behavior of Buried Pipelines Under Large Ground Deformations in Active Faults
This paper deals with the tensile failure of buried pipelines subject to abrupt fault movements. The pipe is modeled as a thin cylindrical shell which is essentially semi-infinite. The...
Seismic Behavior of Buried Pipelines Through Field Observation
This paper presents seismic response characteristics of embedded pipes based on field measurements. Strains induced in steel pipe and ductile pipes with expansion joints are studied. Special...
Design of Substation Foundations for Liquefaction
When substation foundations penetrate liquefiable strata within risk prone seismic regions, the potential loss of support must be evaluated with state-of-the-art methods to determine foundation...
A Study of Liquefaction Countermeasures for Manholes Under the Pavement
The gravel drain method has proven to be an effective countermeasure for underground structures in liquefying ground. However, due to the road pavement, there is no draining passage through...
Restrained Underground Piping?Some Practical Aspects of Analysis and Design
This paper is a brief update of stress analysis techniques published earlier [1] to aid the analyst in qualifying continuous welded steel buried pipelines that are subject to seismic soil...
Seismic Analysis and Design of Buried Piping
Among the causes of damage to buried pipelines due to earthquakes, the one that is most complicated to analytically deal with and that is most credible at safety related sites such as...
Seismic Analysis of Buried Pipelines Subjected to Vertical Fault Movement
Earthquakes have demonstrated the vulnerability of buried pipelines, mainly to 'non-dynamic' seismic deformations of the ground, such as liquefaction, landslide...
Evaluation of Earthquake Resistance of Buried Continuous Pipelines at Bent Parts
Small diameter pipelines are susceptible to damage at bends due to large seismic ground displacements. The 'Deformability Index' is defined as the earthquake...
Hybrid Response Analysis of Buried Corrugated Pipeline Under Seismic Wave
Polyvinyl chloride and polyethylene corrugated pipes are recently used for buried water or sewer pipelines and also used as containers for electric cables. Seismic behavior of these pipelines...
Seismic Response of Buried Pipeline System in a Soil Liquefaction Environment
A project to study the general seismic response behavior of buried pipeline systems during a soil liquefaction process has been initiated at Old Dominion University. Pipeline systems could...
Performance of Pipelines During Soil Liquefaction
This paper presents the behavior of buried pipelines during soil liquefaction through reconnaissance work after the 1989 Loma Prieta Earthquake and response analysis based on a beam theory....
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