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Articles 12301 - 12330 of 21751
Full-Text Articles in Engineering
Comparison Of Near-Field Millimeter Wave Probes For Detecting Corrosion Pit Under Paint, Mohammad Tayeb Ahmad Ghasr, Sergey Kharkovsky, R. Zoughi, Russell A. Austin
Comparison Of Near-Field Millimeter Wave Probes For Detecting Corrosion Pit Under Paint, Mohammad Tayeb Ahmad Ghasr, Sergey Kharkovsky, R. Zoughi, Russell A. Austin
Electrical and Computer Engineering Faculty Research & Creative Works
Corrosion pitting defection is a critical issue in the maintenance of aircraft. Near-field microwave nondestructive techniques have been successfully used for defection of corrosion under paint. In this paper a comparison between several different millimeter wave probes is made for the detection and evaluation of corrosion precursor pitting under paint at Ka-band and V-band. Since the pittings investigated here are very small in size, spatial resolution and sensitivity of the probes are critical issues. If is shown that modified open-ended rectangular probes namely, tapered waveguide and dielectric slab-loaded waveguide probes provide high resolution and sensitivity for the detection and evaluation …
A Web-Shareable Real-World Imaging Problem For Enhancing An Image-Processing Curriculum, R. Joe Stanley, Steve Eugene Watkins, Anand Gopal, Randy Hays Moss
A Web-Shareable Real-World Imaging Problem For Enhancing An Image-Processing Curriculum, R. Joe Stanley, Steve Eugene Watkins, Anand Gopal, Randy Hays Moss
Electrical and Computer Engineering Faculty Research & Creative Works
A real-world laboratory exercise is presented for image processing and related curricula. The exercise is a traffic-monitoring problem in which a truck must be tracked as it moves across a bridge and its velocity measured. Sequential images are taken from a dedicated Web camera that views the Smart Composite Bridge on the University of Missouri-Rolla campus. The prototype bridge is a field laboratory for several interdisciplinary courses, including a Machine Vision elective. The Machine Vision image-processing elective uses the traffic-monitoring exercise to give students experience with processing complex images, tracking image markers, and applying theoretical orthographic concepts. The laboratory exercise …
Control Of Cascaded Multilevel Inverters, Keith Corzine, M. W. Wielebski, Fang Zheng Peng, Jin Wang
Control Of Cascaded Multilevel Inverters, Keith Corzine, M. W. Wielebski, Fang Zheng Peng, Jin Wang
Electrical and Computer Engineering Faculty Research & Creative Works
A new type of multilevel inverter is introduced which is created by cascading two three-phase three-level inverters using the load connection, but requires only one dc voltage source. This new inverter can operate as a seven-level inverter and naturally splits the power conversion into a higher-voltage lower-frequency inverter and a lower-voltage higher-frequency inverter. This type of system presents particular advantages to Naval ship propulsion systems which rely on high power quality, survivable drives. New control methods are described involving both joint and separate control of the individual three-level inverters. Simulation results demonstrate the effectiveness of both controls. A laboratory set-up …
Pulse Train Control Technique For Flyback Converter, Mark Telefus, Anatoly Shteynberg, Mehdi Ferdowsi, Ali Emadi
Pulse Train Control Technique For Flyback Converter, Mark Telefus, Anatoly Shteynberg, Mehdi Ferdowsi, Ali Emadi
Electrical and Computer Engineering Faculty Research & Creative Works
Pulse TrainTM control technique is introduced and applied to flyback converter operating in discontinuous conduction mode (DCM). In contrast to the conventional pulse width modulation (PWM) control scheme, the principal idea of Pulse Train is to achieve output voltage regulation using high and low power pulses. The proposed technique is applicable to any converter operating in DCM. However, this work mainly focuses on flyback topology. In this paper, the main mathematical concept of the new control algorithm is introduced and simulations as well as experimental results are presented.
Modeling Switched-Reluctance Machines By Decomposition Of Double Magnetic Saliencies, Farzad R. Salmasi, Babak Fahimi
Modeling Switched-Reluctance Machines By Decomposition Of Double Magnetic Saliencies, Farzad R. Salmasi, Babak Fahimi
Electrical and Computer Engineering Faculty Research & Creative Works
This paper presents a novel analytical model for a switched-reluctance machine (SRM) based on decomposition of its inherent double joint magnetic saliencies due to rotor and stator salient poles and saturation of magnetic field at high stator currents. with this method, the magnetic characteristics of the motor, such as flux linkage and incremental inductance, are decomposed to vector functions of rotor position and phase current. Dynamic state and torque equations for the SRM are derived on the basis of this representation. the proposed model is appropriate for online identification and for sensor less position control algorithms. It is easy to …
Susceptibility Characterization Of A Cavity With An Aperture By Using Slowly Rotating Em Fields: Fdtd Analysis And Measurements, Kimitoshi Murano, Takeshi Sanpei, Fengchao Xiao, Chen Wang, Yoshio Kami, James L. Drewniak
Susceptibility Characterization Of A Cavity With An Aperture By Using Slowly Rotating Em Fields: Fdtd Analysis And Measurements, Kimitoshi Murano, Takeshi Sanpei, Fengchao Xiao, Chen Wang, Yoshio Kami, James L. Drewniak
Electrical and Computer Engineering Faculty Research & Creative Works
This paper describes the evaluation of the susceptibility of a cavity with an aperture using the finite-difference time-domain (FDTD) method and experimentally. To reduce the computing time, the FDTD method is used for the radiation from the cavity and the susceptibility is obtained by using the reciprocity theorem. The cavity used here is modeled after a full-tower desktop enclosure with a 3.5-in bay. The susceptibility characteristics are evaluated by measuring outputs of a monopole antenna and transmission lines installed in the cavity. The susceptibility characteristics, using a three-dimensional (3-D) map, are studied from the computed and the measured results by …
A Sequential Approach To Modeling Catalytic Reactions In Packed-Bed Reactors, Jing Guo, Muthanna H. Al-Dahhan
A Sequential Approach To Modeling Catalytic Reactions In Packed-Bed Reactors, Jing Guo, Muthanna H. Al-Dahhan
Chemical and Biochemical Engineering Faculty Research & Creative Works
A Sequential Modeling Approach is Proposed to Simulate Catalytic Reactions in Packed-Bed Reactors. the Hydrogenation of Alpha-Methylstyrene and Wet Oxidation of Phenol Are Selected as Studied Cases. the Modeling Scheme Combines a Reactor Scale Axial Dispersion Model with a Pellet Scale Model. Without Involving Any Fitting Parameters, Such an Approach Accounts for the Non-Linear Reaction Kinetics Expression and Different Types of Pellet-Liquid Wetting Contact. to Validate the Developed Modeling Scheme and the Parallel Approach Reported in the Literature, the Experimental Observations for Hydrogenation of Alpha-Methylstyrene to Cumene Have Been Employed. the Predicted Results by Both Approaches Agree Reasonably with the …
High Confidence Testing For Instrumentation System-On-Chip With Unknown-Good-Yield, N. J. Park, Bin Jin, Koshy M. George, Nohpill Park, Minsu Choi
High Confidence Testing For Instrumentation System-On-Chip With Unknown-Good-Yield, N. J. Park, Bin Jin, Koshy M. George, Nohpill Park, Minsu Choi
Electrical and Computer Engineering Faculty Research & Creative Works
SoCs are in general built with embedded IP cores, each of which is procured from different IP providers with no prior information on known-good-yield (KGY). In practice, partial testing is a practical choice for assuring the yield of the product under the stringent time-to-market requirements. Therefore, a proper sampling technique is a key to high confidence testing and cost effectiveness. Based on previous research, this paper proposes a novel statistical testing technique for increasingly hybrid integrated systems fabricated on a single silicon die with no a-priori empirical yield data. This problem is referred to as the unknown-good-yield (UKGY) problem. The …
Cost-Driven Optimization Of Fault Coverage In Combined Built-In Self-Test/Automated Test Equipment Testing, Shanrui Zhang, Minsu Choi, Nohpill Park, Fabrizio Lombardi
Cost-Driven Optimization Of Fault Coverage In Combined Built-In Self-Test/Automated Test Equipment Testing, Shanrui Zhang, Minsu Choi, Nohpill Park, Fabrizio Lombardi
Electrical and Computer Engineering Faculty Research & Creative Works
As the design and fabrication complexities for the instrumentation-on-silicon systems intensify, optimization of combined Built-In Self-Test (BIST) and Automated Test Equipment (ATE) testing becomes more desirable to meet the required fault-coverage while maintaining acceptable cost overhead. The cost associated with combined BIST/ATE testing of such systems mainly consists of the following; (1) the cost induced by the BIST area overhead and (2) the cost induced by the overall testing time. In general, BIST has faster testing speed than ATE, while it can provide only limited fault-coverage and driving higher fault-coverage from BIST means additional area cost overhead. On the other …
Determination Of Dielectric Property Profile In Cement-Based Materials Using Microwave Reflection And Transmission Properties, Bharath Akuthota, R. Zoughi, K. E. Kurtis
Determination Of Dielectric Property Profile In Cement-Based Materials Using Microwave Reflection And Transmission Properties, Bharath Akuthota, R. Zoughi, K. E. Kurtis
Electrical and Computer Engineering Faculty Research & Creative Works
Microwave characterization methods are effective means for evaluating dielectric properties of materials and correlating them to their important physical, chemical and mechanical properties. For characterization purposes most materials are considered homogeneous and the measurement of their dielectric properties is fairly straightforward. However, certain materials may be considered inhomogeneous in such a way that their dielectric properties vary in a preferred direction within the material. To evaluate the dielectric property profile of these materials an electromagnetic model is necessary that can be used along with their measured reflection and transmission properties. This paper presents the development of such a model which …
Determination Of The Thickness And Dielectric Constant Of A Dielectric Slab Backed By Free-Space Or A Conductor Through Inversion Of The Reflection Coefficient Of A Rectangular Waveguide Probe, Jesse Lai, Dana M. Hughes, Eric Gallaher, R. Zoughi
Determination Of The Thickness And Dielectric Constant Of A Dielectric Slab Backed By Free-Space Or A Conductor Through Inversion Of The Reflection Coefficient Of A Rectangular Waveguide Probe, Jesse Lai, Dana M. Hughes, Eric Gallaher, R. Zoughi
Electrical and Computer Engineering Faculty Research & Creative Works
Evaluation of thickness and material properties of coatings and dielectric slabs is an important practical issue. Microwave nondestructive testing techniques, using open-ended rectangular waveguide and coaxial probes have shown great potential for this purpose. However, to evaluate one parameter requires that the other be known a priori. This paper discusses the use of a relatively efficient method for evaluating both parameters simultaneously from measurements of the reflection coefficient of a test material. Results of two cases as well as a brief discussion of the limitations of the technique are provided in this paper.
Polarized Neutron Measurement Of Magnetic Order In Yba2Cu3O6.45, Herbert A. Mook, Pengcheng Dai, Stephen M. Hayden, Arno Hiess, Sh Lee, Fatih Dogan
Polarized Neutron Measurement Of Magnetic Order In Yba2Cu3O6.45, Herbert A. Mook, Pengcheng Dai, Stephen M. Hayden, Arno Hiess, Sh Lee, Fatih Dogan
Materials Science and Engineering Faculty Research & Creative Works
Orbital current order of the d-density-wave type has been postulated to explain the pseudo gap in high temperature superconductors. We have performed neutron scattering experiments to search for this order and show here the results obtained on an YBa2Cu3O6.45 sample using the best neutron spectrometers available. We argue that the data are consistent with a small, largely c-axis-directed moment, found below about 200 K.
Magneto Rheological Dampers — A New Paradigm In Base Isolation Techniques In Earth Quake Engineering, S. Suresh Babu
Magneto Rheological Dampers — A New Paradigm In Base Isolation Techniques In Earth Quake Engineering, S. Suresh Babu
International Conference on Case Histories in Geotechnical Engineering
Over the past three decades, a great deal of interest has been generated regarding the use of structural protective systems to mitigate the effects of dynamic environmental hazards, such as earth quakes and strong wind, on Civil Engineering structures. These systems usually employ supplemental damping devices to increase the energy dissipation capability of the protected structure. One of the most promising new devices proposed for structural protection is Magneto rheological (MR) fluid dampers because of their mechanical simplicity, high dynamic range, low pressure requirements, large force capacity and robustness, this class of devices has been shown to mesh well within …
Past Proceedings: 3rd International Conference On Recent Advances In Geotechnical Earthquake Engineering & Soil Dynamics (1995), Multiple Authors
Past Proceedings: 3rd International Conference On Recent Advances In Geotechnical Earthquake Engineering & Soil Dynamics (1995), Multiple Authors
International Conference on Case Histories in Geotechnical Engineering
No abstract provided.
Restoration Of Path Service To Lower Manhattan, Raymond E. Sandiford, Samuel Leifer, Mark Mcneilly
Restoration Of Path Service To Lower Manhattan, Raymond E. Sandiford, Samuel Leifer, Mark Mcneilly
International Conference on Case Histories in Geotechnical Engineering
When the World Trade Center was destroyed the transit link connecting Lower Manhattan and New Jersey, the Port Authority’s Trans Hudson system or PATH, was cut. The PATH station, which was located beneath the WTC, was destroyed, the two tunnels under the Hudson River were flooded, and the first PATH station in New Jersey was rendered useless for train movements. Immediately after Sept 11, the re-establishment of the downtown PATH service was identified as a key element in the revitalization of Lower Manhattan. The re-establishment of PATH service required that three elements of major construction be completed. These were the …
Non-Destructive Evaluation Of Deep Foundations, Frank Rausche
Non-Destructive Evaluation Of Deep Foundations, Frank Rausche
International Conference on Case Histories in Geotechnical Engineering
Non-Destructive Testing (NDT) or Non-Destructive Evaluation (NDE) of a great variety of materials and structures has become an integral part of many manufacturing processes. The same tendency towards more testing for improved quality assurance is also apparent in the deep foundation industry. However, the process of testing long piles, deeply embedded in the ground, is more complex than the NDE of other materials: the product can only be accessed from its smallest side and the material is often concrete or timber, which are rather heterogeneous materials with unreliable properties. The greatest difficulties, however, are presented by the intimate contact between …
The Collapse Of Fukae (Hanshin Expressway) Bridge, Kobe, 1995: The Role Of Soil And Soil-Structure Interaction, George Mylonakis, Costis Syngros
The Collapse Of Fukae (Hanshin Expressway) Bridge, Kobe, 1995: The Role Of Soil And Soil-Structure Interaction, George Mylonakis, Costis Syngros
International Conference on Case Histories in Geotechnical Engineering
The paper investigates the role of soil in the collapse of a 630m segment (Fukae section) of the elevated Hanshin Expressway during the severe Kobe earthquake of 1995. From a geotechnical viewpoint, the earthquake has been associated with extensive liquefactions (notably of reclaimed ground), lateral soil spreading, and damage to waterfront structures. However, there is evidence that soil-foundation-structure interaction (SFSI) in non-liquefied ground played a detrimental role in the seismic performance of local structures, including the one under investigation. The bridge consisted of single circular concrete columns monolithically connected to a concrete deck, founded on pile groups in alluvium sand …
Settlement Back-Analysis Of Buildings On Soft Soil In Southern Germany, H.-G. Kempfert, B. Soumaya
Settlement Back-Analysis Of Buildings On Soft Soil In Southern Germany, H.-G. Kempfert, B. Soumaya
International Conference on Case Histories in Geotechnical Engineering
This paper presents 10 case-histories of buildings on soft clay in southern Germany. A lot of field observations show that the calculated settlements using the routine analysis are on average 50 % larger than settlements actually measured in this area. A back-analysis is carried out to verify the soil parameters which are intended to investigate in the subsurface exploration phase and later in a laboratory test program. Recommendations for the engineering practice are suggested to review the determination of compressibility parameters and, consequently, to improve the settlement prediction.
Design And Installation Of Foundations In Various Ground Conditions At Four Power Stations In The U.K., Christopher D. Parks, David E. Jones, José L. M. Clemente
Design And Installation Of Foundations In Various Ground Conditions At Four Power Stations In The U.K., Christopher D. Parks, David E. Jones, José L. M. Clemente
International Conference on Case Histories in Geotechnical Engineering
The design and installation of safe and economic foundation solutions for large projects is of great importance in contributing to commercial success. On four recent power projects in the U.K., a variety of foundation solutions have been adopted, driven largely by the particular ground conditions encountered at each location. All four projects were gas fired combined cycle power station facilities and each location provided unique challenges in both the design and installation of the foundations. The variety of foundation soils encountered was diverse; soft alluvial peat and clay, loose to medium dense silty sands and moderately weak to moderately strong …
Design And Construction Of A Support Of Excavation System For A Deep Cut-And-Cover Tunnel In Downtown Boston, Yousef Alostaz, Abdol Hagh, Jack Pecora
Design And Construction Of A Support Of Excavation System For A Deep Cut-And-Cover Tunnel In Downtown Boston, Yousef Alostaz, Abdol Hagh, Jack Pecora
International Conference on Case Histories in Geotechnical Engineering
This paper presents the analysis, design, implementation and construction of a Value Engineering Cost Proposal (VECP) for the support of excavation system for parts of the underground Central Artery Tunnel in downtown Boston. The excavation varies between about 130 ft and 240 ft in width and between 60 ft and 100 ft in depth. The typical structure of the tunnel consists of soldier pile tremie concrete (SPTC) walls, roof girders with a cast-in place (CIP) concrete slab and a CIP invert slab. The SPTC walls, constructed using the bentonite slurry technique, act as the temporary earth-support structure as well as …
Increase In Pile Capacity With Time In Missouri River Alluvium, Paul J. Axtell, Jacob W. Owen, Scott D. Vollink
Increase In Pile Capacity With Time In Missouri River Alluvium, Paul J. Axtell, Jacob W. Owen, Scott D. Vollink
International Conference on Case Histories in Geotechnical Engineering
The data measured in this study suggest that the increase in compressive pile capacity for a 42-ft long, HP14x102 pile, in a predominantly fine-grained Missouri River alluvium soil profile, increases by about 16 percent from days seven to forty-four after driving. It appears evident that Davisson’s (1973) failure criteria seems to agree fairly well with the observed plunging failure of two compressive pile-load failure tests performed in Missouri River alluvium. By comparison of compressive proof and failure tests performed on day forty-four after driving, it appears that loading a pile to some degree prior to failure, and then reloading the …
Settlement Of A Light Rail Pier Supported On Large Diameter Bored Piles Remediated By Jet Grouting, Emilio M. Morales, Toshio Ono
Settlement Of A Light Rail Pier Supported On Large Diameter Bored Piles Remediated By Jet Grouting, Emilio M. Morales, Toshio Ono
International Conference on Case Histories in Geotechnical Engineering
A support Pier (Pier 161) for a Light Rail line being constructed for the Metro Manila Light Rail Project encountered large settlements after the installation of the Precast Deck Girders. This pier supports bridge crossing across the San Juan River with a total span of sixty (60) meters. This Pier is supported on six (6) 1500 mm diameter bored piles designed to extend down to 17 meters or socketed into bedrock at least 2.0 meters based on design requirements. The structure started to settle during the erection of the superstructure when the dead load reached about 700 metric tons. Total …
Foundations Over Expansive Soil, A Saudi Arabia Case History, Syed Faiz Ahmad
Foundations Over Expansive Soil, A Saudi Arabia Case History, Syed Faiz Ahmad
International Conference on Case Histories in Geotechnical Engineering
Presence of highly plastic clays in Hofuf in Al-Hassa (an oasis in the eastern part of Saudi Arabia) indicated existence of potential expansive soil problems in these regions. Hofuf is notoriously known as the area with expansive clay problem and finds mention in text books on the subject also. The first ever “Stiffened Slab Waffle Foundation” in Saudi Arabia was poured on Sunday the 7th February1999 for the Barracks in Prince Abdullah Military City, in Hofuf. In this Paper, a Case History is being presented encompassing: the experiences of this project vis-à-vis geotechnical complexities of the Site, decision to adopt …
Snow Avalanche Training Dike At Flateyri, Iceland, Pálmi R. Pálmason, Fjóla Guðrún Sigtryggsdóttir, Flosi Sigurðsson, Gunnar Guðni Tómasson
Snow Avalanche Training Dike At Flateyri, Iceland, Pálmi R. Pálmason, Fjóla Guðrún Sigtryggsdóttir, Flosi Sigurðsson, Gunnar Guðni Tómasson
International Conference on Case Histories in Geotechnical Engineering
October 26, 1995 a snow avalanche hit a village in NW Iceland killing 20 people. Subsequently, extensive research on the properties and characteristics of avalanches and defence possibilities was instigated aiming at appraising preventive measures. Due consideration of the prevailing conditions showed training dikes (deflecting dams) of specific height and angles to be the most cost effective measures, provided that these could be constructed from materials available in the immediate vicinity. Additionally, the steeper the slope facing the avalanche (upstream) the more protective the dike. This was designed and constructed at 1 vertical to 1.25 horizontal upstream. The 1200 m …
Treatment Or Unconformity Zone And Curtain Grouting In Foundation Of Almatti Dam On Krishna River, Mahavir Bidasaria
Treatment Or Unconformity Zone And Curtain Grouting In Foundation Of Almatti Dam On Krishna River, Mahavir Bidasaria
International Conference on Case Histories in Geotechnical Engineering
Curtain Grouting is an important component of Foundation treatment of Dam and other hydraulic structures. The purpose of Curtain Grouting is to form a zone of low permeability upto a designed depth on the upstream of the dam. This grout curtain along with downstream drainage system controls the uplift pressure and piping which are potential hazards. The present case study deals with providing grout curtain to Almatti Masonry Dam from Block No. 1 to 52. Besides curtain grouting this case study also deals with the treatment of weak zone (unconformity zone) of thickness upto 6 m, which was existing in …
Evaluation Of Structural Alternatives For Seismic Risk Mitigation At Deer Creek Dam, David W. Curran, David Rees Gillette
Evaluation Of Structural Alternatives For Seismic Risk Mitigation At Deer Creek Dam, David W. Curran, David Rees Gillette
International Conference on Case Histories in Geotechnical Engineering
Deer Creek Dam is a zoned earthen embankment on the Provo River in central Utah. The site is potentially subject to very severe earthquake loading, and some foundation materials have been identified as being likely to be liquefied by strong shaking. This could lead to instability or large dynamic deformations of the downstream slope, and possibly a breach of the dam. Several structural concepts were evaluated by the U.S. Bureau of Reclamation to determine the best method to stabilize the embankment. The selected modification concept was a rolled earthfill key under the downstream toe of the embankment, with a berm …
Dynamic Geotechnical Characterization For The Microzonation Of The Seismic Area Of Catania, Antonio Cavallaro, Michele Maugeri
Dynamic Geotechnical Characterization For The Microzonation Of The Seismic Area Of Catania, Antonio Cavallaro, Michele Maugeri
International Conference on Case Histories in Geotechnical Engineering
The present study is part of a research programme, namely "Detailed Scenarios and Actions for Seismic Prevention of Damage in the Urban Area of Catania", financed by the National Department for the Civil Protection and National Research Council – National Group for the Defence Against Earthquake (CNR – GNDT). Among the objectives of the project there are in particular the geotechnical characterisation of soils of the city of Catania and the evaluation of site effects due to local site amplification phenomena. The investigation program was performed in seven different test areas of Catania. One of which is the "Plaja beach" …
Channel Tunnel Rail Link – Contract 220 Graham Road Deep Vent Shaft, John Coupland, Peter Openshaw
Channel Tunnel Rail Link – Contract 220 Graham Road Deep Vent Shaft, John Coupland, Peter Openshaw
International Conference on Case Histories in Geotechnical Engineering
The 53m deep, 1.2m thick, heavily reinforced diaphragm wall, constructed to form this vent shaft, would not normally merit special mention. What makes this project notable is that the work was carried out within the confines of a very small city site, surrounded by residential properties, immediately adjacent to an operating rail line and with strict limits on permitted working hours and noise levels. This paper describes the construction phase of the work including the planning, preparation, means and methods undertaken to overcome the constraints noted above. Because of the potential problems and consequently the inherent significant construction risk the …
Lining Design For Alborz Tunnel In Iran, N. S. Bulychev, N. N. Fotieva, A. S. Sammal, I. Siavoshi
Lining Design For Alborz Tunnel In Iran, N. S. Bulychev, N. N. Fotieva, A. S. Sammal, I. Siavoshi
International Conference on Case Histories in Geotechnical Engineering
The paper describes the application of analytical methods if tunnel linings design under static, tectonic and seismic effects for the design of the transport tunnel Albors in Iran. The methods are based on solutions of the corresponding plane problems of the elasticity theory simulating the initial stress fields in the rock mass caused by gravitational or tectonic forces and actions of long arbitrary directed longitudinal (P) and shear (S) waves propagating in the plane of the tunnel cross-section. For the design of tunnel linings under seismic effects the original approach has been applied consisting in the determination of maximal compressive …
Directionally Drilled Raw Water Intakes, Grand Forks, North Dakota, Brian C. Dorwart, Gregory R. Fischer, Wayne L. Gerszewski, Michael K. Yavarow
Directionally Drilled Raw Water Intakes, Grand Forks, North Dakota, Brian C. Dorwart, Gregory R. Fischer, Wayne L. Gerszewski, Michael K. Yavarow
International Conference on Case Histories in Geotechnical Engineering
The City of Grand Forks, North Dakota obtains drinking water from both the Red River and Red Lake River through a system of raw water intakes, shallow pipelines and pump stations. During flood events, the City often loses access to the system. In addition, the banks of the rivers are subject to land sliding, which can easily damage the shallow intakes. This proved particularly true during the record flood event in 1997, and resulted in the design of a new setback levee system by the U.S. Army Corps of Engineers. As a result, the City decided to construct a new …