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Articles 7591 - 7620 of 13031
Full-Text Articles in Engineering
Levee Foundation Remediation Using The Deep Mix Method, Wesley Schmutzler, Filippo Maria Leoni, Kyle Sansing
Levee Foundation Remediation Using The Deep Mix Method, Wesley Schmutzler, Filippo Maria Leoni, Kyle Sansing
International Conference on Case Histories in Geotechnical Engineering
Hurricane Katrina was responsible for hundreds of deaths, billions of dollars of damage, and left the levee system in New Orleans in a state of disrepair. Many levees that make up the Flood Protection system for New Orleans were overtopped and sustained considerable damage. This case history will look at one section of levee in New Orleans East designated LPV (Lake Pontchartrain and Vicinity) -111 that is 5.3 miles in length. LPV-111 was overtopped and breeches occurred adjacent to structures. The United States Army Corps of Engineers (USACE) was tasked to not only repair the levee, but also to raise …
Susceptibility Analysis On Landslide Triggering Factors During The 2008 Wenchuan Earthquake, Deping Guo, Masanori Hamada
Susceptibility Analysis On Landslide Triggering Factors During The 2008 Wenchuan Earthquake, Deping Guo, Masanori Hamada
International Conference on Case Histories in Geotechnical Engineering
The 2008 Wenchuan earthquake with Mw7.9 induced numerous landslides along the Longmen Mt. zone in Sichuan Province of China. The authors investigated into various influential factors on the slope stability of 119 landslides in Wenchuan County, such as horizontal peak ground acceleration, slope angle, slope height, rock materials and geological structures. The authors developed hanging wall and footwall‟s acceleration attenuation formulae from 115 seismic stations and the formulae confirmed hanging-foot wall effect had notable influence on landslide distribution density and occurrence probability. The results of multivariable analysis clarified that slope height, horizontal peak ground acceleration and geological structures …
The Simplified Kzp6 Method For Tieback Wall Design In Granular And Cohesive Soils, Kumars Zand-Parsa, Kamran Zand-Parsa
The Simplified Kzp6 Method For Tieback Wall Design In Granular And Cohesive Soils, Kumars Zand-Parsa, Kamran Zand-Parsa
International Conference on Case Histories in Geotechnical Engineering
Tieback retaining walls are using as temporary shoring systems for bridge footings or other structures that need deep excavations. Design and design review process are time consuming, and the possibility of making mistakes encourages us to find a simplified method for designing the tieback walls. Tieback walls with maximum 20m height and with 1 to 4 rows of anchors is considered in this paper. Whole length of the drilled holes will be filled with grout after setting the rods or stressing cables. Sometimes for temporary shoring the rod will be anchored to a concrete block supported by dirt, so there …
Finding F.O.S For Flow Type Landslide With Static Liquefaction At Karshingsa – A Case Study, Gokul K. Bayan
Finding F.O.S For Flow Type Landslide With Static Liquefaction At Karshingsa – A Case Study, Gokul K. Bayan
International Conference on Case Histories in Geotechnical Engineering
Karshingsa is a hilly terrain situated in lower Himalayan region under Arunachal Pradesh in India. It expresses occurrence of severe landslides of debris flow nature almost every year as and when consecutive 3-month rainfall precipitation during peak monsoon period exceeds about 2,300 mm, all along the lower Himalayan region of Eurasian plateau most particularly in Karshingsa area. Study carried out in the lower belt of Arunachal Himalaya for about more than one decade proclaims that 45%-55% landslides are flow type origin, the debris of which are flowing like liquid. Mechanism of such flow failure is static liquefaction developed in a …
Case Study On The Rehabilitation Of A Distressed Retaining Wall, G. L. Sivakumar Babu, Pawan Kumar, Raja Jaladurgam
Case Study On The Rehabilitation Of A Distressed Retaining Wall, G. L. Sivakumar Babu, Pawan Kumar, Raja Jaladurgam
International Conference on Case Histories in Geotechnical Engineering
Earth retaining structures usually need careful monitoring after construction in order to detect any signs of distress. In cases where failure is likely to occur, appropriate remedial techniques need to adopted, backed by a detailed analysis. This paper presents a case study on the rehabilitation of a retaining wall that was constructed for a bypass road project. The structure showed clear signs of distress immediately after completion and hence could not be opened for traffic. Preliminary finite element analysis of the wall showed values of factor of safety that are lesser than permissible values. The values of factor of safety …
Observations Save The Day At The Wachovia Cultural Center Excavation, D. Bruce Nothdurft, E. J. Cording, J. Sid Davis
Observations Save The Day At The Wachovia Cultural Center Excavation, D. Bruce Nothdurft, E. J. Cording, J. Sid Davis
International Conference on Case Histories in Geotechnical Engineering
In the observational method, gaps in the available information are filled by observations. Such observations were invaluable during the construction of a 54-story building with an 8-story underground parking deck in Charlotte, North Carolina, which required an excavation nearly 100-feet deep into rock. Cracks appeared in an adjacent brick office building by the time the north side of the excavation had reached a depth of about 40 feet. Blast-induced settlement was initially suspected. As excavation continued, some soilfilled weathered joints, seams, and fractures in the rock sidewalls were observed, and displacement of the cracks increased. Inclinometer casings were installed along …
Geotechnical Aspect For Protection Bunds, Janvi Talsaniya, Vaishali Pandya, Jigar Rana
Geotechnical Aspect For Protection Bunds, Janvi Talsaniya, Vaishali Pandya, Jigar Rana
International Conference on Case Histories in Geotechnical Engineering
The design team of Water & Environment division of Mott MacDonald, Ahmadabad was involved in design of Rubble mound protection bund for a Sea water intake and outfall project. The project was to provide make up sea water for 2x250 MW Lignite based Thermal Power Pant (TPP) at Bhavnagar for Bhavnagar Energy Company Limited. The makeup water required for TPP was drawn through Sea water Intake (SWI) area constructed in the intertidal zone of Gulf of Khambhat. The SWI area consists of a Pumping Station for pumping sea water from storage pond. The storage pond was surrounded by all around …
Three Dimensional Soil-Structure-Interaction Analysis Of A Flood Wall Under Full-Scale Load Test, Jian Hu, Faiz Makdisi, Zhi-Liang Wang, Kent Hokens, Neil Schwanz
Three Dimensional Soil-Structure-Interaction Analysis Of A Flood Wall Under Full-Scale Load Test, Jian Hu, Faiz Makdisi, Zhi-Liang Wang, Kent Hokens, Neil Schwanz
International Conference on Case Histories in Geotechnical Engineering
The U.S. Army Corps of Engineers (Louisville District) conducted a number of full-scale tests to determine the behavior of continuous steel sheet pile flood walls when subjected to hydrostatic loads simulating actual flood conditions. Among these tests, Test Series III (sheet piling with concrete jacket) was conducted at the Tell City site in Indiana. The results of these full-scale load tests provide valuable data that could help verify geotechnical design procedures. In addition, numerical analyses simulating these tests could be useful in interpreting the foundation and structure behavior and in predicting the performance of similar I-wall-type levee systems subjected to …
Liquefaction Potential Evaluation: Energy-Based Method Compared To Stress-Based Method, Takaji Kokusho
Liquefaction Potential Evaluation: Energy-Based Method Compared To Stress-Based Method, Takaji Kokusho
International Conference on Case Histories in Geotechnical Engineering
A data set of undrained cyclic triaxial test with parametrically changing relative density and fines content is reviewed and interpreted in the scope of energy. It is found that the strain amplitude or pore-pressure buildup during cyclic loading is uniquely related to the energy dissipated in soil specimens. This further indicates that a RL (cyclic stress ratio)-Nc (number of cycles) line corresponding to specific soil strain represents a line of equal dissipated energy. An energy-based method (EBM) is proposed in which liquefaction potential can be evaluated by comparing the dissipated energy with upward seismic wave energy with no …
Bridge Foundation Pile Driving Vibration Monitoring, Kumars Zand-Parsa, Kamran Zand-Parsa
Bridge Foundation Pile Driving Vibration Monitoring, Kumars Zand-Parsa, Kamran Zand-Parsa
International Conference on Case Histories in Geotechnical Engineering
In southern California a big bridge was under construction in urban area. Based on the size and depth of the steel and concrete piles some of the residential buildings within the 200ft distance from the center of the different footings (there were six footings sitting on steel pipe piles) were selected and vibration monitoring devices installed in their back yard. Some of the owners complained during the excavation process for a big channel behind their back yard before starting any pile driving operations. Three of those residential owners informed the authorities during the bottom of that big channel compaction operation …
Effects Of Silt Content On Dynamic Properties Of Solani Sand, Bablu Kirar, B. K. Maheshwari
Effects Of Silt Content On Dynamic Properties Of Solani Sand, Bablu Kirar, B. K. Maheshwari
International Conference on Case Histories in Geotechnical Engineering
In the present article, the results of cyclic triaxial tests conducted on Solani sand, collected from the bed of Solani River near Roorkee, are presented. Results of strain controlled undrained tests carried out as per ASTM D3999 for determinations of dynamic soil properties are presented. The variations of shear modulus with shear strain are reported. Remoulded samples were prepared with different percentage of silt contents and tested. The effects of silt content on shear modulus of Solani sand at different shear strain are evaluated. This effect is studied at two relative densities. It was found that the effect of silt …
Influence Of Relative Position Of The Tunnels: A Numerical Study On Twin Tunnels, W. Channabasavaraj, B. Visvanath
Influence Of Relative Position Of The Tunnels: A Numerical Study On Twin Tunnels, W. Channabasavaraj, B. Visvanath
International Conference on Case Histories in Geotechnical Engineering
The development of cities requires the use of underground area for the construction of transportation infrastructure facilities. Construction of twin tunnels or new tunnel close to the existing ones may be done horizontally, vertically or in inclined manner. In the case of horizontal tunnels the distribution of tunnel load will be more in lateral direction. Since cities are densely concentrated with tall structures, laterally distributed loads will induce settlement in the foundation of the structures. For a particular orientation of tunnels, the soil movement and internal forces in the lining will be affected by both the relative position of tunnels …
Amirkabir Natm Tunnel — A Case Study Of Design Challenges In A Mega Project Of Tunnel In Soft Ground, Aliakbar Golshani, Ehsan Moradabadi
Amirkabir Natm Tunnel — A Case Study Of Design Challenges In A Mega Project Of Tunnel In Soft Ground, Aliakbar Golshani, Ehsan Moradabadi
International Conference on Case Histories in Geotechnical Engineering
In spite of enhancement in modeling techniques as well as site investigation methods, uncertainty exists seriously in the process of construction of underground structure in soft soils. These uncertainties arise from limited data of geological data, measurement errors, interpolation of spatially geological properties, and extrapolation of results of experiments and natural analogue studies over times and conditions relevant to the project. Robust and optimize design of tunnel support pattern consists of many important parameters including advance rate and excavation method. However, quantitative definition of these parameters is difficult because of restricting in site investigation data and uncertainties related to them. …
Understanding Sinkhole Consequences On Masonry Structures Using Large Small-Scale Physical Modeling, Marwan Al Heib, Huu Luyen Nghiem, Fabrice Emeriault
Understanding Sinkhole Consequences On Masonry Structures Using Large Small-Scale Physical Modeling, Marwan Al Heib, Huu Luyen Nghiem, Fabrice Emeriault
International Conference on Case Histories in Geotechnical Engineering
Subsidence and sinkhole are one of important geological risk due to the collapse of underground cavities either natural cavities or due to the human activities (such as mines). The impact of the subsidence and sinkhole on the existing structures can be sever and dramatic. The prediction of the level of damage depends on the characteristics of the sinkhole and the characteristics of the structures. A large small-scale physical model is developed by the INERIS in order to improve the understanding of the behavior of individual masonry structures subjected to ground subsidence or the collapse of underground cavities. The masonry structure …
A Case History Of Super-Large Scale Bridge Pile Foundation In Soft Soil, Chao Yang, Guoliang Dai, Weiming Gong
A Case History Of Super-Large Scale Bridge Pile Foundation In Soft Soil, Chao Yang, Guoliang Dai, Weiming Gong
International Conference on Case Histories in Geotechnical Engineering
The Sutong Yangtze River Bridge is the longest cable-stayed bridge in the world with main span of 1088 m. The pile cap is 113.8 m by 48.1 m by 13.3 m under each pylon and the foundation is super-long large-diameter drilled pile groups consisting of 131 piles with the length of 114/117 m and the diameter of 2.8/2.5m. This paper presents the static loading tests on single piles, centrifugal model tests on pile groups, finite element analysis, cap model tests and field monitoring for the super-large scale pile foundation. The results show that: the super-long large-diameter bored pile of Sutong …
Ellis Island: Vibration Effects On Historic Buildings Caused By Pile Driving, Sixto Fernandez
Ellis Island: Vibration Effects On Historic Buildings Caused By Pile Driving, Sixto Fernandez
International Conference on Case Histories in Geotechnical Engineering
The seawalls that surround Ellis Island were constructed in the early 1900s and now show varying degrees of deterioration. The approach to the structural repair of the seawalls consisted of installing H-piles and ground anchors for stabilization of vertical and horizontal seawall movements. The H-piles were driven through the retained soils along the seawalls to top of rock. This paper presents ground vibration data collected simultaneously by four seismographs during driving of 40 piles (up to 100 ft depth) at various distances from the historical buildings. A correlation between the recorded PPV values and the distance to pile driving is …
Geotechnical Opportunities On A Fast-Track Bridge Project, Joel W. Rinkel, Christopher G. Naida
Geotechnical Opportunities On A Fast-Track Bridge Project, Joel W. Rinkel, Christopher G. Naida
International Conference on Case Histories in Geotechnical Engineering
The bridge for Nine Mile Road over Interstate 75 in Hazel Park, Michigan was destroyed by a tanker fire. The loss of the bridge was considered an emergency situation. Therefore, the bridge replacement was put on a fast-track schedule. Geotechnical engineering challenges included the design of shallow and deep foundations, design of light-weight backfill behind abutments, design of temporary earth retention systems to minimize traffic disruption during construction, and coordinating design changes during construction based on variable subsurface conditions. The design was based on the Bridge Design Specifications from the American Association of State Highway and Transportation Officials (AASHTO) Load …
Pressuremeter Testing In Stiff To Hard Cohesive Soils, Robert G. Lukas
Pressuremeter Testing In Stiff To Hard Cohesive Soils, Robert G. Lukas
International Conference on Case Histories in Geotechnical Engineering
The pressuremeter which was introduced into the U.S. in about 1970 provides the geotechnical engineer with a new tool for measuring soil properties. It is conducted in-situ thereby minimizing sample disturbance. It also tests the soil under the prevailing stress conditions in the soil mass. Measurements of the failure pressure and modulus of the soil are used to predict bearing capacity and settlement. This paper discusses a few commercial projects plus sites where load tests were performed and settlement measurements were obtained for comparison to predictions based upon pressuremeter parameters.
Table Of Contents, Multiple Authors
Table Of Contents, Multiple Authors
International Conference on Case Histories in Geotechnical Engineering
No abstract provided.
Conference Schedule, Multiple Authors
Conference Schedule, Multiple Authors
International Conference on Case Histories in Geotechnical Engineering
No abstract provided.
Preface, Shamsher Prakash
Preface, Shamsher Prakash
International Conference on Case Histories in Geotechnical Engineering
No abstract provided.
Sally Prakash: Program Director, Spouse Program, Sally Prakash
Sally Prakash: Program Director, Spouse Program, Sally Prakash
International Conference on Case Histories in Geotechnical Engineering
No abstract provided.
Vijay K. Puri, Vijay K. Puri
Vijay K. Puri, Vijay K. Puri
International Conference on Case Histories in Geotechnical Engineering
No abstract provided.
Ahmed Elgamal: Short Curriculum Vitae, Ahmed Elgamal
Ahmed Elgamal: Short Curriculum Vitae, Ahmed Elgamal
International Conference on Case Histories in Geotechnical Engineering
No abstract provided.
Eq-1: Misco Cubrinovski, Misco Cubrinovski
Eq-1: Misco Cubrinovski, Misco Cubrinovski
International Conference on Case Histories in Geotechnical Engineering
No abstract provided.
Spl-1: Sarfaz Ali, Sarfaz Ali
Spl-1: Sarfaz Ali, Sarfaz Ali
International Conference on Case Histories in Geotechnical Engineering
No abstract provided.
Steering Committee, Multiple Members
Steering Committee, Multiple Members
International Conference on Case Histories in Geotechnical Engineering
No abstract provided.
An Investigation Of Load And Resistance Factor Design Of Drilled Shafts Using Historical Field Test Data, Kam Ng, Jessica Garder, Sri Sritharan, Jeramy Ashlock
An Investigation Of Load And Resistance Factor Design Of Drilled Shafts Using Historical Field Test Data, Kam Ng, Jessica Garder, Sri Sritharan, Jeramy Ashlock
International Conference on Case Histories in Geotechnical Engineering
To achieve engineered designs with consistent levels of reliability, the Federal Highway Administration (FHWA) mandated that all new bridges initiated after October 1, 2007, including those founded upon drilled shafts, be designed according to the Load and Resistance Factor Design (LRFD) approach. As the first step in developing efficient regional LRFD procedures for drilled shafts, the Drilled SHAft Foundation Testing (DSHAFT) database was formulated. DSHAFT was aimed at assimilating high quality, historical drilled shaft test data from Iowa and the surrounding states, and it presently contains data from 41 drilled shaft load tests, 38 of which are O-cell load tests, …
Braced Sheet Pile Shoring Wall In Sensitive Clay, Yadav Pathak, Marc Sabourin, Brian Hall, Jake Brucker
Braced Sheet Pile Shoring Wall In Sensitive Clay, Yadav Pathak, Marc Sabourin, Brian Hall, Jake Brucker
International Conference on Case Histories in Geotechnical Engineering
This case history describes the design and performance of a temporary braced sheet pile shoring wall constructed within the median between heavily-trafficked lanes of the Trans Canada Highway in Langley near Vancouver, British Columbia, Canada. The excavation extended to 9.7 m depth below the existing road grade into soft, high plasticity, sensitive glaciomarine clay. Glaciomarine clay is locally notorious for excavation and embankment stability and foundation settlement problems. The shored excavation was required to provide an access pit to allow the installation of a 3 m diameter steel pipe culvert by Horizontal Pile Driving (HPD). The braced sheet pile wall …
Case Studies — Pavement Of The Educator's Road, Richard Ray, Peter Scharle, Robert Szepesházi
Case Studies — Pavement Of The Educator's Road, Richard Ray, Peter Scharle, Robert Szepesházi
International Conference on Case Histories in Geotechnical Engineering
One of the lessons of educational strategies in geo-engineering is to inspire the students’ motivation by telling them how the geoengineer thinks and why is it worth attaining. The Geotechnical Triangle developed by Burland proved to be a useful conveyance to deliver essentials of the geo-engineers’ habit of mind. Slight extension of this simplex to a tetrahedron brings into the framework the construction technology, equivalent of importance with ground profile, observed behavior and appropriate model. Case histories retain their central role within this 3D simplex. In this perspective geo-engineering proves to be analogous with medicine where concepts such as symptom, …