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Articles 1 - 30 of 351
Full-Text Articles in Geotechnical Engineering
Sub-Surface Corrosion Research On Rock Bolt System, Perforated Ss Sheets And Steel Sets For The Yucca Mountain Repository, Dhanesh Chandra, Jaak J.K. Daemen, Jaime Gonzalez, Raymond Keeler, Amy J. Smiecinski
Sub-Surface Corrosion Research On Rock Bolt System, Perforated Ss Sheets And Steel Sets For The Yucca Mountain Repository, Dhanesh Chandra, Jaak J.K. Daemen, Jaime Gonzalez, Raymond Keeler, Amy J. Smiecinski
Publications (YM)
The objective of the proposed investigation is to conduct corrosion research and predict the durability of rock-bolts and other underground metallic roof supports. In critical areas, it is possible to use highly corrosion resistant steels for rock bolts at Yucca Mountain (YM) repository, as the steel rock bolts, as well as other materials such as Bernold type shields for tunnels at YM site [1-4]. In addition, there is propensity for stress corrosion cracking as well as hydrogen induced cracking in rock bolts likely to occur in YM repository emplacement under drift conditions. As corrosion of these materials for underground support …
Review Of The Product Development Process And Information Flow In The Manufacturing Industry: Problems And A Possible Wav Forward, E Opiyo
Tanzania Journal of Engineering and Technology (TJET)
No abstract provided.
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 …
Reclamations – Case Studies, Madhira R. Madhav, Norihiko Miura
Reclamations – Case Studies, Madhira R. Madhav, Norihiko Miura
International Conference on Case Histories in Geotechnical Engineering
Increasing demands for urban water fronts and the need for continually operational airports coupled with shortages of land spaces has led to the growth of lands reclaimed from the near and off-shore regions of the world. Case histories of reclamations of recent times in the east, especially in Japan, Hong Kong, Korea, Singapore, etc. are reviewed. The paper also reports the methods of reclamation, the improvement of reclaimed ground and examples of observed settlements in typical cases.
Mitigation Of Train-Induced Ground Vibrations; Lessons From The Ledsgård Project, Mehdi Bahrekazemi, Anders Bodare, Bo Andréasson, Alexander Smekal
Mitigation Of Train-Induced Ground Vibrations; Lessons From The Ledsgård Project, Mehdi Bahrekazemi, Anders Bodare, Bo Andréasson, Alexander Smekal
International Conference on Case Histories in Geotechnical Engineering
Ground vibrations due to train traffic on ground surface railways built on soft soil can cause annoyance to people, disturb the function of sensitive machinery in nearby buildings and increase the maintenance costs of the track. At low frequencies (< 20 Hz) the level of vibrations is highly dependent on train weight and speed. This issue must be considered in the design of new railway lines or upgrading old ones. In 1997, shortly after inauguration of the X-2000 high-speed passenger trains between Gothenburg and Malmö in the southern Sweden, extremely high vibration levels were reported in the railway structure, nearby soil and the catenaries at the Ledsgård site and other locations along the newly built ¨West Coast Line¨. In order to mitigate the vibrations and allow the trains to run at their design speed of 200 km/h, soil stabilization using the lime-cement column method was carried out in summer 2000. Measurements before and after the countermeasure showed that, vibrations in the track at maximum speed (200 km/h) were reduced by factor of ten or more. The paper presents the soil stabilization project and some results from the measurements carried out in connection with it.
Vibration Prediction And Optimization: The Case Histories Of Quarry Blasts In Thailand, Sanga Tangchawal
Vibration Prediction And Optimization: The Case Histories Of Quarry Blasts In Thailand, Sanga Tangchawal
International Conference on Case Histories in Geotechnical Engineering
Vibration measurements for 3 types of quarry rock at a number of sites in Thailand have been carried out and analyzed. The dominant vibration parameters in bench blasting are based on the peak particle velocity and the blast frequency. These readings are evaluated using the threshold limit of damage and the probability method. Results indicate that the damage possibility is low and within the acceptable limit. A further step of evaluation is to predict the safe distance from vibration by utilizing the modified trend line. This paper also describes steps taken in the planning stage to determine the optimal design …
Observations And Performance Of A Soil Nail Shoring Wall In Seattle Silts And Clays, Shaun D. Stauffer, Daniel J. Campbell, Andrew E. Sparks, Keith Miller, Michelle Leviant
Observations And Performance Of A Soil Nail Shoring Wall In Seattle Silts And Clays, Shaun D. Stauffer, Daniel J. Campbell, Andrew E. Sparks, Keith Miller, Michelle Leviant
International Conference on Case Histories in Geotechnical Engineering
The Seattle Central Library project, which replaced the existing downtown library, consists of a twelve-story building with several below-grade levels. The excavation encompassed an entire city block and had plan dimensions of approximately 250 feet by 240 feet. The original excavation depth was up to 53 feet in height. The excavation was made in highly overconsolidated Seattle silts and clays (Lawton Clay). The Lawton Clay has been documented to exhibit expansive behavior along planes of weakness associated with stress relief upon excavation. The original excavation was designed to be supported using a tieback soldier pile wall, typical of shoring systems …
Improvement Of Fine Sand Properties With Water Soluble Epoxy Resin Grouts, Costas Anagnostopoulos, Evangelos Stavridakis, Ioannis Grammatikopoulos
Improvement Of Fine Sand Properties With Water Soluble Epoxy Resin Grouts, Costas Anagnostopoulos, Evangelos Stavridakis, Ioannis Grammatikopoulos
International Conference on Case Histories in Geotechnical Engineering
It is generally accepted, that only chemical grouts or solutions are available to penetrate and fill narrow joints or soils with very small pore size. During the last 30 years, a few hundreds of different compounds have been used for this purpose. Such materials show a wide spectrum of properties. Epoxy resins are some of the common compounds which are used in chemical grouting due to their high strength and durability against mechanical or physical erosion. In this paper, the improvement of physical and mechanical properties of fine sand injected with a water soluble, two component epoxy resin is investigated. …
Foundation Optimization And Design For Replacement Of The Woodrow Wilson Bridge, Roderic A. Ellman Jr., Sissy Nikolaou, Mishac K. Yegian
Foundation Optimization And Design For Replacement Of The Woodrow Wilson Bridge, Roderic A. Ellman Jr., Sissy Nikolaou, Mishac K. Yegian
International Conference on Case Histories in Geotechnical Engineering
The new Woodrow Wilson Bridge (WWB) will replace the existing bridge over the Potomac River to connect Alexandria, Virginia to Prince Georges County, Maryland. The new WWB will extend approximately 1.1 miles across the river, with a 367-ft long bascule span in the main river channel where the water depth is about 36 ft. The subsurface soil profile consists of up to 50 ft of a soft organic silty clay layer that is very vulnerable to scour, underlain by a deep deposit of hard sandy clay. This paper will present results from a Pile Demonstration Program (PDP) that was conducted …
Steering Committee, Multiple Members
Steering Committee, Multiple Members
International Conference on Case Histories in Geotechnical Engineering
No abstract provided.
Table Of Contents - Papers, Multiple Authors
Table Of Contents - Papers, Multiple Authors
International Conference on Case Histories in Geotechnical Engineering
No abstract provided.
Settlement Of Shallow Foundations Constructed Over Reinforced Soil: Design Estimates Vs. Measurements, Michael Majchrzak, Marshall Lew, Ken Sorensen, Tom Farrell
Settlement Of Shallow Foundations Constructed Over Reinforced Soil: Design Estimates Vs. Measurements, Michael Majchrzak, Marshall Lew, Ken Sorensen, Tom Farrell
International Conference on Case Histories in Geotechnical Engineering
Faced with difficult soil conditions for the support of two 6-story office towers in Dublin, CA and of a 6-story parking garage in Sacramento, CA, engineers recommended the use of Geopier Rammed Aggregate Piers to reinforce the soil for the support of high bearing capacity spread footings instead of deep foundations. Foundation selection for both sites was influenced by long-term settlement performance, schedule and cost savings, and seismic uplift resistance. Rammed aggregate piers were installed to strengthen upper weak and compressible soil layers resulting in a substantially stiffer soil layer on which shallow, high bearing capacity spread footings were constructed. …
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.
Static And Dynamic Response Analysis Of A High Rock-Fill Dam With A Clay Core, Gang Wang, Bing-Yin Zhang, Jian-Min Zhang
Static And Dynamic Response Analysis Of A High Rock-Fill Dam With A Clay Core, Gang Wang, Bing-Yin Zhang, Jian-Min Zhang
International Conference on Case Histories in Geotechnical Engineering
Stress strain analysis based on Biot’s consolidation theory is performed for Nuozhadu dam, which is a high rock-fill clay-core dam located in the Langcangjiang River in Yunnan province, China. Attention is mainly focused on arching effect and possibility of hydraulic fracturing of the core. Equivalent linear approach is employed to evaluate the seismic response of the dam under design earthquakes, and two empirical formulas relating residual shear and volumetric strain to cyclic stress and strain history are proposed to evaluate the permanent deformation. It is found that: 1) the modulus ratio of the clay in the core to rockfills around …
A Study On The Performance Of A Reinforced Dike Section With Geogrid During The Tottori-Ken Seibu Earthquake, Yasushi Sasaki, Takashi Fukuwatari, Tomoharu Tsuji, Seiji Kano, Shun-Ichi Sawada, Hideyasu Uekuma
A Study On The Performance Of A Reinforced Dike Section With Geogrid During The Tottori-Ken Seibu Earthquake, Yasushi Sasaki, Takashi Fukuwatari, Tomoharu Tsuji, Seiji Kano, Shun-Ichi Sawada, Hideyasu Uekuma
International Conference on Case Histories in Geotechnical Engineering
A dike section reinforced with geogrid against soil liquefaction was hit by a damaging earthquake in 2000. As the site condition of this dike section was anticipated to be liquefied by an earthquake, so it was decided to take remedial measures against possible damage. However, since the hinterland of this newly constructed dike section was a rural area, primary objective of the treatment design was set to avoid the stretching effect caused by the liquefaction. For this purpose, three sheets of geogrid were laid at the bottom of the embankment. It was detected that 85% length of the dike section …
Conditions Of Structural Stability And Vibration Damage, Arinos Xavier Tavares
Conditions Of Structural Stability And Vibration Damage, Arinos Xavier Tavares
International Conference on Case Histories in Geotechnical Engineering
The paper presents the investigation conducted in a one-story-house and its rear annex which suffered severe damages due to a process of differential settlements of their foundations, flowing water in the subsoil and vibrations of the traffic of vehicles on the street nearby. The house is located in the city of Curitiba in the south of Brazil. The subsoil is composed of tropical clay and sand silty soils of Guabirotuba Formation. It is formed of pleistocene sediments in Curitiba area. The foundations of the house and the annex were in excavated small 8” diameter short concrete piles. Due to the …
On-Line Response Tests On Case History Of Earthquake Induced Deformation Of River Dykes Founded On Saturated Sandy Deposits, Masayuki Hyodo, Teruhisa Fujii, Norimasa Yoshimoto, Naoki Takahashi, Adrian F. L. Hyde
On-Line Response Tests On Case History Of Earthquake Induced Deformation Of River Dykes Founded On Saturated Sandy Deposits, Masayuki Hyodo, Teruhisa Fujii, Norimasa Yoshimoto, Naoki Takahashi, Adrian F. L. Hyde
International Conference on Case Histories in Geotechnical Engineering
River dykes and road embankments are frequently damaged during earthquakes. The liquefaction of foundation, the behavior of which is not yet well realized, is considered to be the main cause of the damage. Based on the results of past studies, the foundation of an embankment was divided into three zones to examine the failure modes. One-dimensional on-line earthquake tests, which were conducted by a combination of element tests and computer earthquake response analyses, were performed for such zones of actual river dykes damaged during earthquake. The cumulative horizontal displacement values obtained by the tests were compared with the measured embankment-crest …
Foundation System For “ Akshardham” To Control Deformations Related To Probable Liquefaction, Mahesh D. Desai, Pranav L. Desai, Nehal H. Desai
Foundation System For “ Akshardham” To Control Deformations Related To Probable Liquefaction, Mahesh D. Desai, Pranav L. Desai, Nehal H. Desai
International Conference on Case Histories in Geotechnical Engineering
The paper presents a system of foundation for 38.0 m high monumental unique structure “ Akhsardham” on bank of “Yamuna” river at Noida ,New Delhi(India). The design is outcome of interaction of ideological requirements of Architects, Seismologist, Geotechnical and Structural engineers, as well as those empirical rules of Vastu- Shastra for religious places. The structure is typical flexible stone monument. It is located on alluvium of “Yamuna” river in seismic Zone IV of Bureau of Indian standards. The preliminary exploration report indicated liquefaction potential and suggested deep foundations. The engineering priests decided against use of steel for the structure expected …
Deep Excavation Braced By Diaphragm Wall In Gdańsk (Poland), G. A. Horodecki, A. F. Bolt, E. Dembicki
Deep Excavation Braced By Diaphragm Wall In Gdańsk (Poland), G. A. Horodecki, A. F. Bolt, E. Dembicki
International Conference on Case Histories in Geotechnical Engineering
Protection of deep excavation by cast in situ concrete diaphragm walls for Shopping Center in Gdansk (Poland) is described. The structure was designed as five-storey-building with three additional underground floors and founded on diaphragm walls. The excavation was made by “half-floor” method with temporary supports of floor in the form of steel columns. Static calculations of excavation bracing were carried out by PLAXIS numerical code for both design stage (for two calculation schemes: anchored and supported by floor ring) as well as after its construction (back analysis). The calculations served for an assessment of predicted wall displacements, deformations of soil …
History Of Passive Pressure Of Non-Cohesive Mass And Its Consequences For Theory Of Earth Pressure, Petr Koudelka, Tomáš Koudelka
History Of Passive Pressure Of Non-Cohesive Mass And Its Consequences For Theory Of Earth Pressure, Petr Koudelka, Tomáš Koudelka
International Conference on Case Histories in Geotechnical Engineering
Recently, the long-term research of passive pressure has been carried out. The rotation about the toe of the physical model sized 3.0*1.0*1.2 m has brought unexpected results similarly as the previous research of active pressure. The research contains among others the investigation of time stability of both pressure components, i.e. normal component and shear component. The paper presents latest information about physical modelling and its results and compares the results with the concept of the developed the General Lateral Pressure Theory (GLPT). This theory is supported also by the monitored time instability of lateral pressure, which is discussed as well. …
Jacking Pits In Boston’S Central Artery Project, Arturo Ressi Di Cervia
Jacking Pits In Boston’S Central Artery Project, Arturo Ressi Di Cervia
International Conference on Case Histories in Geotechnical Engineering
The jacking of the largest concrete tunnels ever built in the United States required the construction of jacking pits of unusual dimensions and requirements. The location of the pits posed the additional challenge of difficult ground conditions, since the bottom of the pits was in the Boston blue clay. The pits had to have an unsupported span of over 40 feet to accommodate the dimensions of the tunnel, have a solid base to carry the weight of the sections being built and provide lateral resistance to the thrust of the jacks. Treviicos met those challenges by constructing a four feet …
Analysis Of The Invert Damage And Its Rehabilitation Design. The Saint Louis Les Aygalades Tunnel Case Study, Verya Nasri, Christian Winum
Analysis Of The Invert Damage And Its Rehabilitation Design. The Saint Louis Les Aygalades Tunnel Case Study, Verya Nasri, Christian Winum
International Conference on Case Histories in Geotechnical Engineering
The combined effect of time with the non-homogenous mechanical and hydraulic behaviors of the various intermediate layers between the foundation soil and the tracks often result in undesired deformation and misalignment of the tracks, which can compromise performance of the railway tunnel. The tunnel of Saint-Louis les Aygalades is located on the Paris Marseille mainline. This 476 m long tunnel was built in 1847, from the two portals and two intermediate shafts, under a maximum cover of 35 m in the tertiary formation of Stampien. The section of the tunnel consists of an elliptical vault with large vertical axis resting …
Economic Aseismic Design Of Rigid Retaining Wall, Yingwei Wu, Shamsher Prakash, V. K. Puri
Economic Aseismic Design Of Rigid Retaining Wall, Yingwei Wu, Shamsher Prakash, V. K. Puri
International Conference on Case Histories in Geotechnical Engineering
Rigid retaining walls experience significant displacements during earthquakes. Several investigators have developed 1- D and 2-D models to predict displacements. A critical review of the state of the art shows that these model may not predict realistic displacements Wu (1999). A new 2-D model, which considers strain dependant soil stiffness and material damping, sliding and rocking motions, and practical field water conditions behind the wall as per Eurocode (1994) has been developed (Wu 1999). This model represents a considerable advance over the existing solutions and is easily useable by the practicing engineer. It has been shown that walls inclined on …
A Model Based On Mechanics To Predict Settlements In Bioreactor Landfills, C. H. Hettiarachchi, J. N. Meegoda, J. P. Hettiaratchi
A Model Based On Mechanics To Predict Settlements In Bioreactor Landfills, C. H. Hettiarachchi, J. N. Meegoda, J. P. Hettiaratchi
International Conference on Case Histories in Geotechnical Engineering
Prediction of waste settlement behavior during the construction phase of a landfill is vital to effective functioning of leachate recirculation systems and gas collection pipe network, yet prediction of waste settlement is complex and difficult to perform. Few models, are currently available which can be used to calculate landfill settlement of the entire waste thickness after closure without accounting for variation in density and other parameters with depth. By starting after closure, these models do not account for settlements during construction. The use of entire depth does not allow for the calculation of strains at different depths. When landfills are …
Estimation Of Site Effects In The Israel Seacoast Area By Ambient Noise Records For Microzonation, Y. Zaslavsky, A. Shapira, M. Gorstein, M. Kalmanovich
Estimation Of Site Effects In The Israel Seacoast Area By Ambient Noise Records For Microzonation, Y. Zaslavsky, A. Shapira, M. Gorstein, M. Kalmanovich
International Conference on Case Histories in Geotechnical Engineering
Owing to the proximity to seismically active faults as well as the population density in the band of Israel Seacoast between the towns of Ashqelon and Haifa, this region may be considered a high seismic risk zone. For quantitative assessment of seismic response in terms of horizontal-to-vertical (H/V) spectral ratios the ambient noise survey was carried out at 190 sites. Results derived from H/V analysis indicate site amplifications ranging from 1 to 8 within the frequency band 1.0-6.0 Hz. The soil profiles at the investigated sites were very different. Some sites have simple profiles in the uppermost surface layer and …
Source Process Of Normal Earthquakes: The 3 February 2002, M6.3 Afyon, Turkey And The 7 September 1999, M5.9 Athens, Greece Earthquakes, Zafeiria Roumelioti, Christoforos Benetatos, Anastasia Kiratzi, Nikos Theodoulidis, Mustafa Aktar, Hayrullah Karabulut, Gonca Orgulu
Source Process Of Normal Earthquakes: The 3 February 2002, M6.3 Afyon, Turkey And The 7 September 1999, M5.9 Athens, Greece Earthquakes, Zafeiria Roumelioti, Christoforos Benetatos, Anastasia Kiratzi, Nikos Theodoulidis, Mustafa Aktar, Hayrullah Karabulut, Gonca Orgulu
International Conference on Case Histories in Geotechnical Engineering
The source process of two normal-fault earthquakes, the 3 February 2002, M6.3 Afyon, Turkey and the 7 September 1999, M5.9 Athens, Greece earthquakes are studied using regional, teleseismic and strong motion data. Detailed information derived from teleseismic waveform modeling and source time functions inversions are combined and used to forward model recorded strong ground motion. Both events presented evidence for emergence of strong directivity effects during their rupture, which greatly affected the distribution of strong ground motion. These results are indicative of the contribution of the source factor to the distribution of earthquake damage and consequently of its importance in …
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 …
Seismic Response Analysis Of Historical Towns Rising On Rock Slabs Overlying A Clayey Substratum, G. Lanzo, L. Olivares, F. Silvestri, P. Tommasi
Seismic Response Analysis Of Historical Towns Rising On Rock Slabs Overlying A Clayey Substratum, G. Lanzo, L. Olivares, F. Silvestri, P. Tommasi
International Conference on Case Histories in Geotechnical Engineering
Two case histories are presented which refer to the historical towns of Orvieto and Bisaccia, both located on top of rock buttes overlying a more deformable clayey substratum. The comparison of the two case histories indicates that apparently similar geological conditions do not lead to the same type of seismic response. In fact, the specific physical and dynamic properties of the substratum and the overlying slab can determine different seismic behaviour at the hill top and at the rock-clay interface. In particular, at Bisaccia a deamplification of the seismic motion at the hill top was predicted, as well as the …
Case Histories Of Jet Grouting For Canal Excavations, Saravut Jaritngam
Case Histories Of Jet Grouting For Canal Excavations, Saravut Jaritngam
International Conference on Case Histories in Geotechnical Engineering
This paper presents a several case histories of jet grouting for the slope protection on soft soil. The design concept and the method of analysis of jet grouting, the method of adopted installation and effectiveness of jet grouting are presented and discussed. The project site of this study is located at Nakornsrithamarat province, South of Thailand. The comparison of soil properties before and after improvement by the jet grouting is presented. The jet grouted was adopted to serve as firm foundations and increases the slope stability during the construction process. Finally, it can be concluded that this case study can …
Quality Control Of Cement Deep Soil Mixing Work For The Port Of Oakland Projects, David S. Yang, Christopher J. Coutu, Larry L. Scheibel
Quality Control Of Cement Deep Soil Mixing Work For The Port Of Oakland Projects, David S. Yang, Christopher J. Coutu, Larry L. Scheibel
International Conference on Case Histories in Geotechnical Engineering
The Cement Deep Soil Mixing (CDSM) method is an in situ soil treatment technology that introduces and mixes cementitious materials with native soils using hollow-stem rotating shafts equipped with a cutting tool at the tip and mixing paddles above the tip. The successful use of the soil-cement produced by CDSM relies on the selection of acceptance criteria and construction quality control during the in situ soil mixing process. Two CDSM projects for the Port of Oakland are used as case examples to present the acceptance criteria set and the execution of the quality control program for the soil mixing work. …