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Articles 61 - 90 of 351
Full-Text Articles in Engineering
Case History Illustrating The Challenges Of Foundation Design And Construction In Karst Terrain, Frederick A. Brinker, Petro W. Kazaniwsky, Melissa Logan
Case History Illustrating The Challenges Of Foundation Design And Construction In Karst Terrain, Frederick A. Brinker, Petro W. Kazaniwsky, Melissa Logan
International Conference on Case Histories in Geotechnical Engineering
This paper discusses the challenges associated with design and construction of foundation systems for a Corporate Campus located in Chester County, Pennsylvania that is underlain by Karst terrain. A comprehensive subsurface investigation was implemented to develop adequate foundation systems and related site work precautions. Because there was evidence of sinkhole activity prior to any construction work, and the subsoils revealed some variability from a consistency/density standpoint, the selected foundation system design included a combination of soil improvement using compaction grouting for shallow foundations and deep drilled-pier foundations. After construction activities began, several occurrences of solution activity were documented and repaired. …
The Experience Of Reinforcement Of Existing Buildings During Construction In Conditions Of Compact Urban Planning, V. V. Semkim, A. Shaposhnikov
The Experience Of Reinforcement Of Existing Buildings During Construction In Conditions Of Compact Urban Planning, V. V. Semkim, A. Shaposhnikov
International Conference on Case Histories in Geotechnical Engineering
Two-level underground part of 12-storeyed dwelling building was constructed in the historical center of Moscow in 2000. The strengthening of foundations was carried out by pressing in of tubular and concrete piles or by placing of bore and injection piles, depending on the results of mathematical modeling. Geotechnical monitoring of the adjacent buildings was carried out in the process of strengthening and new construction. The results of monitoring confirmed the correct way of the chosen solutions: the settlements did not exceed the ultimate permissible values.
Moorhouse Development – London Deep Sleeved Base-Grouted Piles And Perimeter Retaining Walls, John Coupland, Mouwafak Kassir
Moorhouse Development – London Deep Sleeved Base-Grouted Piles And Perimeter Retaining Walls, John Coupland, Mouwafak Kassir
International Conference on Case Histories in Geotechnical Engineering
The construction of the deepest base grouted piles in London was a challenge in itself, but to do this in a city center site measuring 85m by 53m in plan and 3.5m below street level was a true achievement. The piled foundations had been designed to isolate the building from future ground movements associated with construction of the CrossRail underground rail tunnels linking east and west London, which would run below the building. To achieve the required isolation, the design of the foundations called for the provision of frictionless pile sleeves to depths of 26m (85ft), and base grouting of …
Foundation Works For Aktau Port, I. Rasin Duzceer
Foundation Works For Aktau Port, I. Rasin Duzceer
International Conference on Case Histories in Geotechnical Engineering
The purpose of this paper is to review the design, installation and performance of steel tubular piles and steel sheet piles in the Port of Aktan, Kazakhstan. Due to steady increase in the level of Caspian Sea since 1977, the level of the exisitng quay was increased. The workd consisted of rehabilitation of quay frontage including general raising of the port working areas by about 2 meters. The subsoil consiste of 5m medium dense to dense fine sand underlain by 6m thick very stiff silty clay. Fractured limestone were encountered at a depth of 14m. A total 592 vertical and …
Ground Improvement Methods Recently Practiced To Solve The Geotechnical Engineering Problems In Bangladesh, Muhammad Alamgir, Khaled Hassan Chowdhury
Ground Improvement Methods Recently Practiced To Solve The Geotechnical Engineering Problems In Bangladesh, Muhammad Alamgir, Khaled Hassan Chowdhury
International Conference on Case Histories in Geotechnical Engineering
The field performance of the foundation systems recently practiced in the soft ground of Khulna region to solve the geotechnical engineering problems is described in this paper. The foundation systems adopted to construct the structures in Khulna Medical College, Khulna University, BIT Khulna and a Six-vent regulator on Passur River at Fakirhat are considered for study. In Khulna Medical College project, a shallow foundation system using Geotextilies at the foundation base was employed, while in Khulna University and BIT Khulna, a foundation system using replacing the soft compressible soil layer by compacted sand was used. The soft compressible soil at …
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 …
A Foundation Chart For Historical Town Restoring, Filippo Ciuffi
A Foundation Chart For Historical Town Restoring, Filippo Ciuffi
International Conference on Case Histories in Geotechnical Engineering
A Thematic Area called “Geotechnics and Foundation Analyses” is an important stage of a large, interdisciplinary research activity, carried out on the subsoil of a historical site, in a seismic area, in Italy: the old town of Potenza, capital of the Basilicata Region. Within the said Thematic Area, the design and the construction of a “Foundation Map of a Historical Town” have been performed. The present paper summarizes the basic methodology, the most interesting procedures and the different stages developed for constructing the said map. Described is also the very exceptional effort, made by the Research-team. Foundation and geotechnical parameters …
Foundation Reinforcement Of The Ipanema Beach Offshore Sewage Pipeline, Jayme R. C. Mello, Nelson Szilard Galgoul
Foundation Reinforcement Of The Ipanema Beach Offshore Sewage Pipeline, Jayme R. C. Mello, Nelson Szilard Galgoul
International Conference on Case Histories in Geotechnical Engineering
The Ipanema Beach offshore sewage pipeline was installed thirty years ago in water depths up to 31m, in Rio de Janeiro, Brazil. It has a unique design, because steel piles were driven every 41 to 50m at joint along its length, in order to support it, keeping a constant gradient flow. These piles maintain the pipeline above mudline. After only a few years a first of these pile supports collapsed, allowing the pipeline to drop on the seabed, because of the occurrence of micro-cracks triggered by corrosion and environmental loads. Similar failures took place again before corrective measures could be …
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 …
Unique Foundation Solution For Organic Soil Site, Keith E. Robinson
Unique Foundation Solution For Organic Soil Site, Keith E. Robinson
International Conference on Case Histories in Geotechnical Engineering
A soft soil site, located near Vancouver, BC, presented a unique challenge for the Owner and geotechnical engineer. The relatively narrow but long site was covered by a variable thickness of silty sand and gravel fill overlying about 3 m of peat, organic silt to 12 m depth and very soft, sensitive clay to about 35 m depth. A three/two-story, 27 by 200 m, concrete tilt-up warehouse type structure was proposed for the site. The two foundation options initially considered included the full structure and slab supported on piles driven down to refusal at about 40m depth or conventional spread …
Case Study On The Foundation And Site Geotechnical Evaluation For The Rehabilitation Of An Emergency Hospital Building, Ion Vlad
International Conference on Case Histories in Geotechnical Engineering
This case study is about the foundation and the site geotechnical potential evaluation for the rehabilitation of an emergency hospital building, placed in Bucharest. This building was strongly damaged by the main earthquakes that occurred in Romania, within the last 30 years (March 4th, 1977, August 30th, 1986 and May 30th, 1990). The building had, from the beginning, an unfavorable structural concept, in what concerns its shape in plane. The paper presents the methods used for the rehabilitation of the existing building foundation, together with the integration of a new foundation for a new building, that appeared necessary to be …
Driven Pile Capacity In Clay And Drilled Shaft Capacity In Rock From Field Load Tests, Yasser A. Hegazy, Andrew G. Cushing, Christopher J. Lewis
Driven Pile Capacity In Clay And Drilled Shaft Capacity In Rock From Field Load Tests, Yasser A. Hegazy, Andrew G. Cushing, Christopher J. Lewis
International Conference on Case Histories in Geotechnical Engineering
In this study, two case histories of deep foundations are discussed, including driven piles and drilled shafts. The first case history is an assessment of driven pile capacity in clay. As part of selecting the deep foundation system, steel pipe, concrete, and timber piles were driven at the site. Static compression and uplift load tests were performed on the concrete and timber piles, while only static compression tests were performed on the steel pipe piles. Measured pile capacities from the static load tests were compared to predicted pile capacities, which were obtained from empirical design methods employing laboratory and in-situ …
Deep Foundation Construction In Bouldery Bed: An Overview, R. K. Dhiman
Deep Foundation Construction In Bouldery Bed: An Overview, R. K. Dhiman
International Conference on Case Histories in Geotechnical Engineering
Deep foundation has been used for number of bridge piers in various parts of the world. Construction of deep foundation in case of sandy soil strata is a very easy task however to construct deep foundation in case of bouldery bed is really a challenge for bridge engineers. There are number of cases where this type of foundation has used in the form of caisson of different shapes and it has posed a challenge to bridge engineer due to heterogeneous character of the soil strata underneath. Deep foundations in such strata have been completed using pneumatic sinking based on the …
A Case History Of Site Instability Due To The Presence Of A Shale Layer Above Sloping Bedrock, Sanjeev Kumar, Braja M. Das, Michael L. Hall
A Case History Of Site Instability Due To The Presence Of A Shale Layer Above Sloping Bedrock, Sanjeev Kumar, Braja M. Das, Michael L. Hall
International Conference on Case Histories in Geotechnical Engineering
A study conducted for St. Louis County of Missouri, United States of America classified several areas of the county as unstable for any type of construction because of the presence of high plastic shaley clay or clayey shale on sloping bedrock. These areas are considered to have a potential for site instability to occur due to any change in natural conditions that may increase the moisture content of the high plastic shaley clay or clayey shale. A two-story parking garage, founded on shallow foundations, constructed in one of the potentially unstable zones, showed some movement after several years of its …
Treatment For A Full Weathering Rock Dam Foundation, Yisen Wang, Sihong Liu
Treatment For A Full Weathering Rock Dam Foundation, Yisen Wang, Sihong Liu
International Conference on Case Histories in Geotechnical Engineering
The main dam for the upper reservoir of the Tianhuanping pumped storage power station is a rockfill dam with an asphalt concrete impervious lining on the upstream face constructed on a full weathering rock foundation. In this paper, we present the case study on the treatment for this full weathering rock dam foundation. The treatment includes the partial excavation of the full weathering rock at the main dam foundation, the increase of the transition curvature at the parts where the lining is extended from the upstream face to the reservoir bottom and turned to both the left and the right …
Investigation And Treatment Analysis Of Barikan Landslide, Nader Shariatmadari, Masoud Samimi, Mohammad Rezania
Investigation And Treatment Analysis Of Barikan Landslide, Nader Shariatmadari, Masoud Samimi, Mohammad Rezania
International Conference on Case Histories in Geotechnical Engineering
In last several years periodic reports indicating damages toward resident;s homes due to ground movements in Barikan region, 120km far from tehran, have been issued. The earth movements are demonstrated by tension cracks and scraps on ground surfaces and walls of in site homes and gardens. Since the slow and continuous earth movements were observed in the site, a course of site investigation consisted of the monitoring of surface and deep earth movements has been considered to study the affecting factors and the extent of of landslide. In addition to ground movement measurements, by using the geotechnical properties of different …
Evaluation Of Alternatives For Earthquake Hazard Mitigation Of An Embankment Dam In Kansas, Vlad Perlea, David Mathews, William Empson
Evaluation Of Alternatives For Earthquake Hazard Mitigation Of An Embankment Dam In Kansas, Vlad Perlea, David Mathews, William Empson
International Conference on Case Histories in Geotechnical Engineering
A major embankment dam, approximately 140 feet high and over one mile long, is located in a zone of moderate seismicity in Eastern Kansas. It was determined that slightly cohesive soils and fine sands in the foundation are vulnerable to significant loss of strength by liquefaction during a potential strong earthquake. Numerous seismic retrofit solutions were studied, including the extreme options of “no action” and “replace embankment”. The recommended solution, which is currently designed in detail, considers jet grouting for foundation soil stabilization under the upstream slope and deep soil mixing under the downstream slope.
Mathematical Modeling And Field Evaluation Of Embankment Stabilized With Vertical Drains Incorporating Vacuum Preloading, Buddhima Indraratna, Cholachat Rujikiatkamjorn
Mathematical Modeling And Field Evaluation Of Embankment Stabilized With Vertical Drains Incorporating Vacuum Preloading, Buddhima Indraratna, Cholachat Rujikiatkamjorn
International Conference on Case Histories in Geotechnical Engineering
This study presents the analytical modeling of vertical drains incorporating vacuum preloading in both axisymmetric and plane strain conditions. The effectiveness of vacuum pressure (i.e. both constant vacuum pressure and varied vacuum pressure) applied along the drain is considered. A multidrain plane strain model is employed to analyse an embankment at the site of Second Bangkok International Airport (SBIA) stabilised with prefabricated vertical drains. At this site, a significantly reduced height of sand surcharge was applied by reducing the pore pressures through vacuum preloading. The results of FEM analysis confirm the efficiency of vacuum preloading in comparison with the conventional …
Stože Landslide – A Case History, Stanislav Lenart
Stože Landslide – A Case History, Stanislav Lenart
International Conference on Case Histories in Geotechnical Engineering
The paper describes the Stože landslide that occurred in western Slovenia in November, 2000. It presents the landslide particularities and laboratory tests results. A numerical analysis of the slope failure was performed. It indicated the important role of the ground water level, and the dependence of slope stability upon it. Special laboratory equipment, a large-scale shear cell, was constructed in order to test the landslide material and to indicate the roles of the water content and loading velocities on the residual shear strength of material. A testing method is presented. It was assumed that the behaviour of material with a …
3-D Seismic Response Analysis For Zipingpu Concrete Faced Rockfill Dam, Gang Luo, Jian-Min Zhang
3-D Seismic Response Analysis For Zipingpu Concrete Faced Rockfill Dam, Gang Luo, Jian-Min Zhang
International Conference on Case Histories in Geotechnical Engineering
Zipingpu concrete faced rockfill dam is located at upstream of Min River in Yangtze River drainage basin. It is the main body of Zipingpu hinge who governs irrigating, water supplying, generating electricity, preventing flood and so on. The dam is 156 meters high and 663.8 meters long. And the normal water level is 148 meters high. Investigations indicate the peak ground accelerations is 0.26g and the characteristic period of the ground is 0.17 second. Three-dimensional seismic response analysis was carried out for this dam. Improved equivalent visco-elastic model was adopted in FEM analysis. And the method of equal node force …
Case Study On Failure Mechanism Of Flood Embankments Due To Rapid Sand Boiling On Alluvial Flood Plains And The Identification Of Vulnerable Levee Sections, Sándor Tóth
International Conference on Case Histories in Geotechnical Engineering
Hungary is situated in the deepest part of the Carpathian basin. The majority of the country is alluvial plain. Rivers crossing these plains filled the basin with their sediments and meandered on the deposited sediment during the geological ages. Thus the continuous levee systems developed in the second half of the 19th century, replacing the earlier, rather local defenses, intersected at a number of locations the unforgotten and invisible ancient riverbeds. Experience showed that as the height of the levees was raised to follow the rising tendency of the flood crests, the number of failures due to foundation stability loss …
Landslide Monitoring And Remediation – A Case History, Fan Xi, William Broderick, Paul Rizzo, Jeffery Bair
Landslide Monitoring And Remediation – A Case History, Fan Xi, William Broderick, Paul Rizzo, Jeffery Bair
International Conference on Case Histories in Geotechnical Engineering
An ancient landslide is situated in the vicinity of one of the two reservoirs of a pumped storage power project. Ground movements of the landslide accelerated following the construction of the reservoirs about thirty years ago. Though at a relatively low rate of movement, the active landslide jeopardizes the serviceability of transmission lines and roads traveling through the landslide area. The landslide also poses a potential threat to the adjacent reservoir. Based on long-term monitoring and thorough engineering investigations, remedial measures were developed and implemented in an effort to stabilize the active landslide. Different facets of the remediation construction were …
A Fem Seepage Analysis For Upstream Cofferdam Of Xiluodu Hydraulic Power Station, Ga Zhang, Jian-Min Zhang
A Fem Seepage Analysis For Upstream Cofferdam Of Xiluodu Hydraulic Power Station, Ga Zhang, Jian-Min Zhang
International Conference on Case Histories in Geotechnical Engineering
The upstream cofferdam of Xiluodu hydraulic power station project, with height of 72 meters, is designed as the main body of the project. It is characterized by its high retaining water head, short construction period and complex geological conditions. Presented in this paper is a three-dimensional FEM analysis used to investigate the seepage behavior of the upstream cofferdam for two different design schemes. In the analysis, the cracks in cut-off wall which may be caused in construction are also properly considered. Based on 3D seepage model of saturated-unsaturated flow for non-uniform soils, a fixed-mesh FEM is used in the seepage …
Monitoring And Stabilisation Of The Giants Seat Landslip, U.K., David E. Jones
Monitoring And Stabilisation Of The Giants Seat Landslip, U.K., David E. Jones
International Conference on Case Histories in Geotechnical Engineering
The landslip is located in the Giant’s Seat Woods area of Kearsley, Bolton in Greater Manchester, England. The ground conditions at the site comprise made ground material over mudstones of the Manchester Marls. An area of land crossed by Red Rock Lane had, since the late 1700s, experienced land slip resulting in the ground generally moving south towards the adjacent river. By the late 1990’s the movement of the slip had resulted in fractures and fissures under the road and damage to several other services. A project was developed to stabilise the land along approximately 130m of Red Rock Lane. …
An Unstable Deep Canal Cut In Fat Clay – A Case History Of Slope Failures On The Mcclusky Canal, North Dakota, Mark C. Gemperline
An Unstable Deep Canal Cut In Fat Clay – A Case History Of Slope Failures On The Mcclusky Canal, North Dakota, Mark C. Gemperline
International Conference on Case Histories in Geotechnical Engineering
The McClusky Canal, located in central North Dakota, crosses the divide between the Hudson Bay and Gulf of Mexico drainages. The 74 mile (120 km) long canal has a maximum cut depth of approximately 115 feet (35.1 m) and an average cut depth of 40 ft (12.2 m). Slope failures in deep cuts of high plasticity clay have occurred sporadically since its construction in the 1970s. In addition, a large number of deep failures occurred during construction and recently. The slope failures are examples of the classic problems of construction slope instability and progressive failure. This paper chronicles half a …
Slope Stability Aspects Of The Egnatia Odos Highway Project In Northern Greece, M. N. Skempas, A. W. Livadas
Slope Stability Aspects Of The Egnatia Odos Highway Project In Northern Greece, M. N. Skempas, A. W. Livadas
International Conference on Case Histories in Geotechnical Engineering
The section near the village of Koumaria of the Egnatia Odos highway included a 300 m long cut and cover structure near the foot of a slope being undercut by a river. The combination of the temporary steep cut slopes and the unfavourable weather conditions with low field shear strengths led to successive slope failures in that area and resulted in a heavily affected profile. As a result the cut and cover structure was abandoned in favour of an open cut and various remedial measures were applied for the rehabilitation of the affected area. In the case of another 140 …
Stability And Serviceability Of Tailing Heaps With Visco-Plastic Materials, Rolf Katzenbach, Johannes Giere, Matthias Seip
Stability And Serviceability Of Tailing Heaps With Visco-Plastic Materials, Rolf Katzenbach, Johannes Giere, Matthias Seip
International Conference on Case Histories in Geotechnical Engineering
The tailings of potash mining are piled up in huge heaps with heights of up to more than 200 m and a ground area of often more than a square km. The material behaviour of the salt is strongly visco-plastic, so that the slopes of the heaps are moving constantly at slow rates. As the strength of the salt is rate-dependent, structural analysis of the slope stability has to consider the deformations and deformation rates and the interaction of subsoil and slope. Due to the complex material behaviour the structural analysis is accompanied by an extensive measuring programme within the …
A Dangerous Place To Dig Excavation At The Toe Of Saluda Dam, Elena Sossenkina, Scott Newhouse, Matt Glunt
A Dangerous Place To Dig Excavation At The Toe Of Saluda Dam, Elena Sossenkina, Scott Newhouse, Matt Glunt
International Conference on Case Histories in Geotechnical Engineering
Remedial work on the Saluda Dam will entail excavation at the toe to depths of over 50 ft. Excavation at the toe of a large high hazard dam is an unusual event. Although statically stable the Dam doesn’t meet modern standards for dynamic stability. Based on the assessment of liquefaction potential, the dam requires remediation. The downstream hazard entails consequences of failure of potential loss of life. Due to such consequence, the Regulator called for renovation of Saluda Dam. Engineers evaluated several remedial alternatives. The chosen alternative entails excavation at the toe for construction of new RCC and Rockfill Berms. …
Rock Mass Evaluation Of The Sardar Sarovar (Narmada) Dam And Underground Powerhouse, India, Indra Prakash, Nikhil Desai
Rock Mass Evaluation Of The Sardar Sarovar (Narmada) Dam And Underground Powerhouse, India, Indra Prakash, Nikhil Desai
International Conference on Case Histories in Geotechnical Engineering
Geotechnical evaluation of the 163 m high concrete gravity Sardar Sarovar (Narmada) dam, under construction, and 1200 MW underground powerhouse (210m x 23m x 57.5m) and its ancillary structures has been done. The dam and powerhouse sites are occupied by basalt flows underlain by infra-trappean sedimentary rocks (Bagh beds) intruded by basic dykes. The area is structurally complex and seismically active. Intra-formational shears and sub-horizontal to low dipping weak layers like red bole, tuff, argillaceous sandstone having low values of shear parameters posed the problem of sliding stability of dam blocks. Concrete shear keys were provided as one of the …
Cherry Island. Assessing The Behavior Of A Large Landfill Using Geotechnical Instrumentation, Darrell Wilder, Allen Cadden, Jesús Gómez, Anne M. Germain
Cherry Island. Assessing The Behavior Of A Large Landfill Using Geotechnical Instrumentation, Darrell Wilder, Allen Cadden, Jesús Gómez, Anne M. Germain
International Conference on Case Histories in Geotechnical Engineering
The 513-acre Cherry Island Landfill is located at the junction of the Delaware and Christina Rivers near Wilmington, Delaware. Today the landfill receives approximately 1,850 tons of waste per day. The landfill was constructed directly on soft dredge materials and river deposits which act as a natural liner. Due to the unique geotechnical characteristics at the site, potentially large deformation and slope stability were concerns during the planning and development of the landfill due to the expected high rates of waste placement. Slope stability and finite difference analysis were performed to develop adequate filling plans to cope with the expected …