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Articles 7531 - 7560 of 13031

Full-Text Articles in Engineering

Stabilization Of Existing Sheet Pile Cell In The Ohio River, David W. Bird Apr 2013

Stabilization Of Existing Sheet Pile Cell In The Ohio River, David W. Bird

International Conference on Case Histories in Geotechnical Engineering

An existing 40 foot diameter sheet pile cell (cell) was used to support a dry fly ash loading platform at an electrical power generating facility on the Ohio River. The cell was designed and constructed in 1986 for support of a coal barge unloading crane but was never put into service. The cell has leaned riverward several inches in the years after construction. Stability analysis indicated a less than adequate overturning factor of safety without any additional loads. The addition of the loading platform could result in an overturning failure. A stabilizing system which provided a horizontal stabilizing force of …

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Experimental Study On Mitigation Of Liquefaction-Induced Lateral Displacement Deep Soil Mixing, Rouzbeh Rasouli, Naoki Takahashi, Ali Derakhshani, Suguru Yamada, Yuji Takaoka, Ikuo Towhata Apr 2013

Experimental Study On Mitigation Of Liquefaction-Induced Lateral Displacement Deep Soil Mixing, Rouzbeh Rasouli, Naoki Takahashi, Ali Derakhshani, Suguru Yamada, Yuji Takaoka, Ikuo Towhata

International Conference on Case Histories in Geotechnical Engineering

After 1990s' earthquakes in Japan, lateral flow of liquefiable slopes became a serious concern of engineers. Espisally Kobe earthquake (1995) in which high subsidence of river levee as a result of liquefied sand lateral flow was observed, become a turning point in geotechnical engineering approach in dealing with this phenomena. From that time many different kinds of mitigation measures for preventing or at least controlling the extent of lateral flow have been proposed. Improving soil by deep mixing columns is one of the common methods of soil improvement that can also be used for controlling the consequences of liquefied sand …

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Reconstruction Of A Deteriorating, Tiered, Mse Wall Structure In Connecticut, Matthew E. Meyer, Christian B. Woods, Neritan Axhushi Apr 2013

Reconstruction Of A Deteriorating, Tiered, Mse Wall Structure In Connecticut, Matthew E. Meyer, Christian B. Woods, Neritan Axhushi

International Conference on Case Histories in Geotechnical Engineering

At a retail development site in Southington, Connecticut, a multi-tiered Mechanically Stabilized Earth (MSE) retaining wall system was constructed in the early 1990’s to facilitate development of the site. Specifically, the retaining wall system constructed consisted of a sloped structure with three tiers of MSE wall that was approximately 56-feet tall at its highest point. The MSE walls within the slope were spaced approximately 30 to 40 feet apart horizontally, were between six and nine feet in height, and ranged in length from about 375 feet to 1,325 feet. Overall, grades on the slope ranged from about elevation 225 feet …

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Prevention Of Additional Building Settlement Due To Adjacent Construction At St. Francis Hospital And Medical Center In Hartford, Ct, Giuliana Giuliana, Sean D. Radley, William P. Konicki, Drew Floyd Apr 2013

Prevention Of Additional Building Settlement Due To Adjacent Construction At St. Francis Hospital And Medical Center In Hartford, Ct, Giuliana Giuliana, Sean D. Radley, William P. Konicki, Drew Floyd

International Conference on Case Histories in Geotechnical Engineering

During excavation for the foundation of the new John T. O’Connell North Tower at St. Francis Hospital and Medical Center (SFHMC), in Hartford, Connecticut in 2008, Building 3, an immediately-adjacent five-story brick masonry building suddenly settled up to 1.5 in. and moved laterally about 5/8-in., resulting in severe cracking of interior and exterior bearing walls and floor slabs. The excavation was immediately backfilled within 30 feet of Building 3 and all construction activities were stopped until the condition of Building 3, which provided critical laboratory, pharmacy, and administrative support functions to the hospital, was evaluated and the cause of movement …

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Foundation Treatment Of Embankment Dams With Combination Of Consolidation And Compaction Groutings, Fardin Jafarzadeh, Amir Akbari Garakani Apr 2013

Foundation Treatment Of Embankment Dams With Combination Of Consolidation And Compaction Groutings, Fardin Jafarzadeh, Amir Akbari Garakani

International Conference on Case Histories in Geotechnical Engineering

Treatment of soft or weak foundation in a rockfill dam is of importance due to being susceptible to the large settlements, which may cause the dam body subjected to undesirable deformations and even, catastrophic failures. In this paper the stress- strain behavior of an under construction 58 m embankment dam in North-West of Iran, namely Gerdebin dam, and its soft and weak alluvial thick foundation has been assessed numerically. The effect of combination of consolidation and compaction grouting of the basement (as a remediation method) on the dam deformations and stress levels, is investigated. For this purpose, a finite difference …

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Deep Excavation On 3 Sides Of A 21 Story Building: Accounts Of A Successful Deep Excavation Project, S. Mohsen Haeri, Mohammadhasan Sasar, Kioumars Afshari Apr 2013

Deep Excavation On 3 Sides Of A 21 Story Building: Accounts Of A Successful Deep Excavation Project, S. Mohsen Haeri, Mohammadhasan Sasar, Kioumars Afshari

International Conference on Case Histories in Geotechnical Engineering

TOOBA deep excavation project was conducted in a densely developed area in the North West of Tehran, capital of Iran, to provide space for 4 basement levels for multiple buildings around the already functional TOOBA tower. TOOBA tower is located in the northern leg of the excavation boundary in a way that the northern side of the building abuts the excavation edge. Hence, this project involved excavation on 3 sides of the roughly rectangular plan of TOOBA tower to the depth of 16.5 meters below its foundation level. The necessity for constraining the deformations of the tower commended the construction …

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The Influence Of Freeze-Thaw Cycles On Cbr Values Of Silty Soils Stabilized With Lime And Microsilica, Reza Ziaie Moayed, Younes Daghigh, Behzad Pourhadi Lahiji Apr 2013

The Influence Of Freeze-Thaw Cycles On Cbr Values Of Silty Soils Stabilized With Lime And Microsilica, Reza Ziaie Moayed, Younes Daghigh, Behzad Pourhadi Lahiji

International Conference on Case Histories in Geotechnical Engineering

The use of byproducts of industrial materials is one the most interesting areas in geotechnical engineering in recent years. Microsilica is one of these harmful byproducts that obtained from silicon or silicon alloy metal factories. On the other hand, silty soils are not considered as suitable soils due to their low strength characteristics. In this research, the effects of lime and microsilica on stabilization of silty bed soil of a region of Karaj railway are investigated and its efficiency as a subgrade material is evaluated. To determine the best combination of the stabilizer, various contents of lime and microsilica are …

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3d Fem Modelling Of A Deep Excavation Case Considering Small-Strain Stiffness Of Soil And Thermal Shrinkage Of Concrete, Yuepeng Dong, Harvey Burd, Guy Houlsby, Zhonghua Xu Apr 2013

3d Fem Modelling Of A Deep Excavation Case Considering Small-Strain Stiffness Of Soil And Thermal Shrinkage Of Concrete, Yuepeng Dong, Harvey Burd, Guy Houlsby, Zhonghua Xu

International Conference on Case Histories in Geotechnical Engineering

A typical top-down deep excavation project in Shanghai was carefully monitored during the construction process. This case history was back-analysed with a complex 3D FEM numerical model in ABAQUS to investigate the influence of different modelling procedures. The model considered the detailed construction procedures and structural information. The calculations included the small-strain stiffness of the soil and thermal shrinkage of the concrete beams and slabs. The small-strain stiffness is modelled with a multi-surface soil model developed at Oxford which has been implemented into ABAQUS. The diaphragm wall was modelled as an anisotropic linear elastic material to represent the effect of …

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Geotechnical Characterization Of The Flood Plain Embankments Of The Serchio River (Tuscany, Italy), Barbara Cosanti, Nunziante Squeglia, Diego C. F. Lo Presti Apr 2013

Geotechnical Characterization Of The Flood Plain Embankments Of The Serchio River (Tuscany, Italy), Barbara Cosanti, Nunziante Squeglia, Diego C. F. Lo Presti

International Conference on Case Histories in Geotechnical Engineering

The flood plain embankments of the Serchio river have been constructed since the XVIII century and construction details are not known. These embankments have experienced failures several times during their life (last in December 2009). After the last event a detailed geotechnical investigation has been carried out. This paper discusses the necessary criteria for a cost – effective campaign considering the total length of the embankments (30 km) and the requested level of detail. In fact levee failure, although it is of limited extension, causes the achievement of the ultimate limit state of the entire embankment system. The campaign, in …

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Bloomfield Road Stormwater Storage Tanks Grouting Works, Blackpool, Uk, Mark Edmondson, Pamela Rigby, David Jones, Elizabeth Gallagher, Malcolm Eddleston, David Preece Apr 2013

Bloomfield Road Stormwater Storage Tanks Grouting Works, Blackpool, Uk, Mark Edmondson, Pamela Rigby, David Jones, Elizabeth Gallagher, Malcolm Eddleston, David Preece

International Conference on Case Histories in Geotechnical Engineering

Bloomfield Road Stormwater Storage Tanks, owned by United Utilities PLC, were constructed in 1999 in Blackpool UK to provide 60,000m3 of storage to prevent overflow discharges during the summer bathing water season. The asset comprises two buried tanks (36m diameter and 40m deep) constructed as circular diaphragm walls. Significant groundwater inflows with minor fines content and turbidity up to 48l/s have been reported entering one of the tanks since 2001. From 2008 an increase of fines ingress has been observed indicating potential for progressive failure of the underlying formation strata. The site stratigraphy comprises predominantly glacial superficial soils overlying …

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High-Risk Flood Control Dams On Difficult Soil Foundations, Gary S. Chow, Lori K. Thomas, Willis Walker Apr 2013

High-Risk Flood Control Dams On Difficult Soil Foundations, Gary S. Chow, Lori K. Thomas, Willis Walker

International Conference on Case Histories in Geotechnical Engineering

Addicks and Barker Dams are two flood risk management structures owned and operated by the U.S. Army Corps of Engineers (USACE) and recently classified as extremely high risk. These dams were built in the 1940’s in west Houston, Texas, upstream of a densely populated metropolitan area. The dams consist of 11 and 13 miles of rolled earth embankments, outlet structures with five barrel conduits, and uncontrolled spillways at both ends of both dams. The original design of both dams provided for four of the five outlet conduit barrels to be ungated, permitting a combined uncontrolled discharge from both dams of …

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Remediation Of Distressed Frozen Earth Cofferdams, Joseph A. Sopko, Robert Chamberland Apr 2013

Remediation Of Distressed Frozen Earth Cofferdams, Joseph A. Sopko, Robert Chamberland

International Conference on Case Histories in Geotechnical Engineering

Artificial Ground Freezing was used to provide temporary earth support and groundwater control for a complex system of three frozen earth cofferdams for the Milwaukee Metropolitan Sewer District’s Harbor Siphons Project in Milwaukee, Wisconsin. Site geometry and frozen earth structural design precluded construction of one large excavation, requiring the component system of the tangential cofferdams. High groundwater velocity prevented the formation of the frozen earth walls during various stages of the project. Remedial methods including external dewatering, permeation grouting, jet grouting, timber shoring and sheet piling were attempted to complete the project. Ultimately a more aggressive ground freezing program was …

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Some Remarks On The Influence Of Deep Excavations On Neighbouring Buildings, Cătălin Căpraru, Anton Chirică Apr 2013

Some Remarks On The Influence Of Deep Excavations On Neighbouring Buildings, Cătălin Căpraru, Anton Chirică

International Conference on Case Histories in Geotechnical Engineering

Increasing density of urban areas leads to building high-rise buildings with deep foundations, enabling their basements for car parking and facilities. Increasing depth of the foundation of these buildings increases also the need for more rigid earth retaining systems. Thus, generally, due to the importance of the neighboring buildings, great care has to be taken in the design process of the retaining structure and the support system of deep excavation in densely built urban areas. The paper summarizes a parametric study on a geotechnical model of a deep excavation, proper to Bucharest subsoil, Romania. The analysis of the excavation was …

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Koman Concrete Face Rockfill Dam Updating The Static And Seismic Evaluations, Hamid Fallah, Martin Wieland Apr 2013

Koman Concrete Face Rockfill Dam Updating The Static And Seismic Evaluations, Hamid Fallah, Martin Wieland

International Conference on Case Histories in Geotechnical Engineering

The static and seismic safety evaluation of the 115 m high Koman concrete face rockfill dam, located at the Drin river in Albania has been checked according to the current state-of-practice for the seismic safety evaluation of large embankment dams. For the dynamic analyses with the equivalent linear method a two-dimensional model of the highest dam section was used. The static analysis was carried out by a Mohr-Coulomb elasto-plastic material model of the rockfill. The safety of the dam was checked for the safety evaluation earthquake (SEE) with a peak ground acceleration of the horizontal component of 0.45 g. Spectrum-compatible …

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A Case Study On The Use Of Flexible Earth Retaining Structure In Instable Slopes, H. Turan Durgunoglu, Ahmet Sahin, Onder Akcakal Apr 2013

A Case Study On The Use Of Flexible Earth Retaining Structure In Instable Slopes, H. Turan Durgunoglu, Ahmet Sahin, Onder Akcakal

International Conference on Case Histories in Geotechnical Engineering

Recently new highway, motorway and railway projects take place in many developing countries within the aggressive infrastructure investment programme of governments. In rugged topography, engineers face the challenging problems of designing safe and cost effective cuts and fills for these projects especially under seismic loading and marginal stability conditions. Overall stability mechanism and safety of the cut generally controls the design decisions for the relevant section. In addition, because of the construction width limitations, in some mechanically stabilized earth wall projects sufficient width to accommodate the strip lengths of the retaining system cannot be provided. To eliminate all these problems, …

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Embankment Slope Stability Analysis Of Dwight Mission Mine Site Reclamation Project, Christopher D. Kiser, Prabir K. Kolay Apr 2013

Embankment Slope Stability Analysis Of Dwight Mission Mine Site Reclamation Project, Christopher D. Kiser, Prabir K. Kolay

International Conference on Case Histories in Geotechnical Engineering

The paper presents a slope stability analysis of a proposed embankment contained within an abandoned coal mine reclamation project near Sallisaw, Oklahoma. The project involved the use of computer modeling to analyze the slope stability of the earth-filled embankment. The project plans call for mine spoils and silty-clay borrow materials is used to construct a 74,000 cubic yard embankment, which will be used as a water impoundment for a small lake. The embankment, as designed, consists of a central clay core, mine spoils and a silty-clay material cap. The software program Galena was used as a modeling tool for the …

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Mississippi River Road Gabion Wall/Slope Stabilization, W. Ken Beck, Lok M. Sharma Apr 2013

Mississippi River Road Gabion Wall/Slope Stabilization, W. Ken Beck, Lok M. Sharma

International Conference on Case Histories in Geotechnical Engineering

Lee County widened Mississippi River Road north of the Keokuk, Iowa in the early 1990s, removing material from the toe of slopes along the alignment. Gabion walls were constructed to provide grade separation. Significant precipitation occurred in the spring of 2010, and two (2) wall sections (about 100 feet each in length) failed. Based on our site exploration and instrumentation monitoring data, the gabion wall sections appeared to fail due to additional lateral load from a soil mass sliding on top of the shale bedrock and a buildup of high ground water levels. To support the additional load of the …

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Reconstruction Of Road Embankment Failure Using Reinforced Geogrid: Revisiting The Site After 15 Years, Suhaimi Jamaludin, Kamal Bahrin Jaafar Apr 2013

Reconstruction Of Road Embankment Failure Using Reinforced Geogrid: Revisiting The Site After 15 Years, Suhaimi Jamaludin, Kamal Bahrin Jaafar

International Conference on Case Histories in Geotechnical Engineering

A case history of repair works of road embankment failure at KM39, Route 68, Kuala Lumpur – Bentong Road in the state of Selangor, Malaysia and an observation on the condition of the site after 15 years and some tensile strength testing carried out on buried and exposed geogrid was presented in this paper. Due to heavy rainfall in 1995, about half of the road embankment which was located at the alluvial fan of an upslope stream valley was washout. For the reconstruction of the alignment, the existing half of the alignment was converted into a buffer zone with a …

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Remediation Of A Slope Failure Above Retaining Wall Under Construction, Miroslav Cerny, Lubos Hrustinec Apr 2013

Remediation Of A Slope Failure Above Retaining Wall Under Construction, Miroslav Cerny, Lubos Hrustinec

International Conference on Case Histories in Geotechnical Engineering

In practice is for various reasons very difficult to assume a real sliding failure on the slip surface, which can be created from more parts (straight and curved) with different local soil characteristics. Therefore is usually at classical methods of slope stability shear surface replaced, for example by a cylindrical surface for cohesive soils. An important factor affecting stability is also the effect of groundwater. In practice is just the influence of groundwater very often reason of landslides on natural slopes and cut slopes. Such landslide has happened in the case of construction the retaining wall on the highway D1 …

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Analysis And Design Of Breakwater For Sea Water Intake Facility On South East Coast Of India, Jaykumar Shukla, Laxman Rajwani, Dhananjay Shah Apr 2013

Analysis And Design Of Breakwater For Sea Water Intake Facility On South East Coast Of India, Jaykumar Shukla, Laxman Rajwani, Dhananjay Shah

International Conference on Case Histories in Geotechnical Engineering

The proposed power project site on the South East coast of India required the construction of breakwaters to prevent detrimental effects owing littoral drift along the coast and also to protect the intake channel lining against sea attack. This paper describes the geotechnical design and analysis for breakwater facility proposed for the site. The preliminary design of breakwater was carried out using raw geotechnical data made available in form of the few boreholes investigation and SPT N-values. The general soil profiles suggest that the stratum consist of 37 metres of soft clay below sea bed resting on medium dense to …

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Technical Analyses And Lessons Of The Embankment Failure At The Ajka Red Mud Reservoir, József Mecsi Apr 2013

Technical Analyses And Lessons Of The Embankment Failure At The Ajka Red Mud Reservoir, József Mecsi

International Conference on Case Histories in Geotechnical Engineering

This presentation aims at providing an informative fact-based description of the complex reasons resulting in dam ruptures. The investigations focus on the tragic damage of red mud reservoir No. 10 in Ajka and restrict itself to the engineering aspects of the damage. The analysis of the direct and indirect reasons for the tragic incident may serve as a lesson to our engineers and specialists as well as provide guidelines and revelations with the intention of improvement while emphasizing the necessity of deeper comprehension. Neither this presentation nor the engineering analyses aimed at the search for scapegoats behind the failures.

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Case Study Of Landslides In Kabylia Region, Algeria, Sadaoui Omar, Sadaoui Samir, Bahar Ramdane Apr 2013

Case Study Of Landslides In Kabylia Region, Algeria, Sadaoui Omar, Sadaoui Samir, Bahar Ramdane

International Conference on Case Histories in Geotechnical Engineering

Kabylia is mountainous and coastline region of Algeria. Every year, particularly in the winter, it is affected by landslides displacing an important volume of detritic materials, and causing damages to infrastructures, housing and public facilities. It takes place in geological formations that are particularly favourable to this type of movement, because of the heterogeneity of their facies and the impermeability of some layers. Experience shows that the main cause of the landslides in this region is the combination of several passive and active factors, as geology, morphology, hydrology, climate and anthropic activities. The exceptional rains of winter 2012 triggered a …

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Effect Of The Soil Spatial Variability On The Static And Dynamic Stability Analysis Of A Lebanese Slope, Mansour Neaimeh, Rony Azar, Roni Hmaymes, Georges Nasr, Dalia Youssef Abdel Massih, Jacques Harb, Nancy Salloum, Cécile Cornou, Denis Jongmans Apr 2013

Effect Of The Soil Spatial Variability On The Static And Dynamic Stability Analysis Of A Lebanese Slope, Mansour Neaimeh, Rony Azar, Roni Hmaymes, Georges Nasr, Dalia Youssef Abdel Massih, Jacques Harb, Nancy Salloum, Cécile Cornou, Denis Jongmans

International Conference on Case Histories in Geotechnical Engineering

The accidental topography and heterogeneous Lebanese geology in addition to the active seismicity have initiated the static and dynamic stability analysis of Lebanese slopes. In this paper, the stability of a sandy Lebanese slope situated at Mansourieh near Beirut is investigated using deterministic and probabilistic approaches. The characterization of the variability of the slope soil properties is done based on geological investigation, as well as geophysical (Resistivity and Ambient noise) and geotechnical tests performed on this slope. Three dimensional 3D static deterministic analyses is performed to determine the overall safety factor of the slope and to find the location of …

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Highway Section Affected By Two Neighboring Landslides – Performance, Monitoring And Design Of Stabilization Measures, Vassilis Houssiadas, Eleni Sakoumpenta, Manolis Haralambakis Apr 2013

Highway Section Affected By Two Neighboring Landslides – Performance, Monitoring And Design Of Stabilization Measures, Vassilis Houssiadas, Eleni Sakoumpenta, Manolis Haralambakis

International Conference on Case Histories in Geotechnical Engineering

Two separate deep-seated, creeping landslides exist in close proximity in a mountainous area with highly heterogeneous geological and geotechnical conditions. The ground movements are measured at a depth greater than 50m and affect 65m-high G4 embankment and 240m-long S3 tunnel that are under traffic since 2004. The first landslide affecting the embankment initiated shortly after completion of construction in an area where the highway was realigned after an old, pre-existing unstable area was identified during the design. Tunnel S3, about 300m to the east of embankment G4, suffered from slope instability during construction. This was successfully dealt with and the …

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Rainfall-Induced Debris Flows Case History Along Al-Hada Descent Highway West Of Saudi Arabia, Bahaaeldin Sadagah, Abdulrahman Al-Amri, Mohammed S. Aazam, Omar Al-Hoseiny Apr 2013

Rainfall-Induced Debris Flows Case History Along Al-Hada Descent Highway West Of Saudi Arabia, Bahaaeldin Sadagah, Abdulrahman Al-Amri, Mohammed S. Aazam, Omar Al-Hoseiny

International Conference on Case Histories in Geotechnical Engineering

Al-Hada descent lies at the western region of Saudi Arabia at elevation of about 2000m, characterized by sharp cliff. Al-Hada descent road was constructed with an elevation difference of 1500m between the highest and lowest heights along the road. The road alignment is intersected by 8 very steep gullies of almost 60 to 80 degrees. The gullies contain large quantity of mud, old levees and large rock blocks. Al-Hada descent road hit two weeks ago with heavy rainfall last about 2 hours. The rainstorm initiates 11 debris flows on steep gullies, and caused them to travel rapidly down along the …

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Stabilisation Of Deep Soil Cut Using Micropiles And Soil Nailing, V. V. Vaishampayan, S. P. Bhosle Apr 2013

Stabilisation Of Deep Soil Cut Using Micropiles And Soil Nailing, V. V. Vaishampayan, S. P. Bhosle

International Conference on Case Histories in Geotechnical Engineering

The Railway route through south-west part of India (Konkan Railway) is passing through a hilly terrain. The route is developed by cutting the mountains in slopes and construction of tunnels. Many slopes along this route are very deep and steep. The region is characterized by lateritic soil. A heavy monsoon initiates some of the deep slope failures resulting in large magnitude of loss – both in money and life. The initial failure of one of the slope at Chainage 344/900 Km was stabilized by Gabion walls. West side of the Soil cutting was about 100 m long and a lateritic …

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Stabilizing A Landslide On A Highway Under Traffic: A Case History On Egnatia Motorway In Greece, Eleni Sakoumpenta, Vassilis Houssiadas, Manolis Haralambakis Apr 2013

Stabilizing A Landslide On A Highway Under Traffic: A Case History On Egnatia Motorway In Greece, Eleni Sakoumpenta, Vassilis Houssiadas, Manolis Haralambakis

International Conference on Case Histories in Geotechnical Engineering

In the winter of 2010, a landslide occurred on Egnatia motorway affecting an embankment approximately 300m long and 8–20 m high. The crest of the slide was at a distance of 60m uphill from the highway and the maximum depth of movement was 28 m. The bedrock in the area consists of alternating layers of siltstone and sandstone with local conglomerate intercalations covered by a soil layer of variable thickness (up to 30m) and consistency. The sliding occurred within a zone of plastic red clay just above bedrock exhibiting strength parameters between peak and residual values. A horizontal movement of …

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Seismic Retrofit Of Crane Valley Dam, David Ritzman, Faiz Makdisi, Joseph De Larios, Joseph Sun, Charles Ahlgren Apr 2013

Seismic Retrofit Of Crane Valley Dam, David Ritzman, Faiz Makdisi, Joseph De Larios, Joseph Sun, Charles Ahlgren

International Conference on Case Histories in Geotechnical Engineering

Crane Valley Dam is located on the North Fork of Willow Creek in Madera County, California, and is owned by Pacific Gas & Electric Company (PG&E). The results of seismic stability analyses performed in 2005 and 2006 showed that the dam’s hydraulic fill embankments would experience large deformations during and after the earthquake shaking postulated for the site. To improve the seismic stability and performance of the dam, PG&E initiated the Crane Valley Dam Seismic Retrofit Project (Project), which includes placing new rockfill buttresses on the upstream and downstream slopes of the dam, constructing internal drainage improvements, reinforcing portions of …

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Selection Of Most Appropriate Procedures For Seismic Evaluation Of Levees Based On Case Histories, Vlad Perlea, Khaled Chowdhury, Mary Perlea, George Hu Apr 2013

Selection Of Most Appropriate Procedures For Seismic Evaluation Of Levees Based On Case Histories, Vlad Perlea, Khaled Chowdhury, Mary Perlea, George Hu

International Conference on Case Histories in Geotechnical Engineering

The current methodology for embankment dams evaluation is not appropriate for levees of low heights, which have little effect on the stress state of the foundation soil and, therefore, on its response to the seismic action. In many cases the liquefaction potential of the alluvial deposits is not affected by the levee presence, although is the main factor in levee degradation. Lateral spreading of liquefiable foundation is the main cause of small levee cracking and settlement induced by earthquakes. On the other part, the procedures recommended for evaluation of lateral spreading are not directly applicable to the analysis of levees. …

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Influenced Factor Of Site Information On The Environmental Ground, Katsuya Tanaka, Kiyoshi Hayakawa, Shuuji Honda Apr 2013

Influenced Factor Of Site Information On The Environmental Ground, Katsuya Tanaka, Kiyoshi Hayakawa, Shuuji Honda

International Conference on Case Histories in Geotechnical Engineering

The relationship between “Landform Geology Classification” factor of site information and environmental ground vibration caused by the public transportation in metropolitan was related, and considered.

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