Foundations Conditions Study For Aeolian Power Units On Soft Soils Under Static And Seismic Loads. Case Study,
2013
Technical University of Civil Engineering, Romania
Foundations Conditions Study For Aeolian Power Units On Soft Soils Under Static And Seismic Loads. Case Study, Anton Chirica, Dragos Vintila, Diana Tenea
International Conference on Case Histories in Geotechnical Engineering
The paper presents the analysis of foundations conditions under static and seismic loads for a wind farm located in the Eastern part of Romania. From lithological point of view, the location is characterized by a soft cohesive strata alternation over 40m deep. Some design considerations for obtaining the most economical foundation options are discussed. By taking into account the static and seismic conditions, the soil – structure interaction (S.S.I.) is also revealed together with conclusions on the aeolian towers’ foundations solutions.
Ground Improvement And Settlement Monitoring Program For A Power Plant Project,
2013
CH2M HILL, Santa Ana, CA
Ground Improvement And Settlement Monitoring Program For A Power Plant Project, John J. W. Lee, Ravee Raveendra, Curt Basnett, Yoga Chandran, Robert Howard, Roy Snover
International Conference on Case Histories in Geotechnical Engineering
CH2M HILL is providing engineering, procurement, and construction services for a power plant project in Utah. Before beginning construction on the power plant, geotechnical studies were performed to characterize the subsurface conditions for the anticipated settlement and to determine a ground improvement method to accelerate the construction period. Ground improvement with wick drains and surcharge fill placement was carried out to improve the soft soil conditions at the project site. Settlement monitoring instrumentations were installed before placing structural fill and surcharge fill. An extensive settlement monitoring program was also implemented inside and around the perimeter of the project site to …
Ground Improvement For Redevelopment Of Former Landfill,
2013
Soil and Materials Engineers, Inc., Plymouth, MI
Ground Improvement For Redevelopment Of Former Landfill, Larry P. Jedele, Brandon Buschmeier
International Conference on Case Histories in Geotechnical Engineering
A former industrial landfill site was selected for the design and construction of a large industrial building. Due to the soil and groundwater conditions along with potential environmental impacts discussed in this paper, support of the building using shallow spread foundations or conventional deep foundations, such as driven or cast-in-place piles or drilled piers were not considered to be reasonable foundation support alternatives. Therefore, ground improvement was deemed the best alternative to support the building, floor slabs and machine foundations for the project, although timber piles with a structural slab were also considered. Controlled modulus columns and rammed aggregate piers …
Impacts Of Drain Water On Soils And Crops And It Causes: A Case Study Of Kamber Taluka, Pakistan,
2013
Shah Abdul Latif University Khairpur, Pakistan
Impacts Of Drain Water On Soils And Crops And It Causes: A Case Study Of Kamber Taluka, Pakistan, Noor Hussain
International Conference on Case Histories in Geotechnical Engineering
Taluka Kamber has been the receiving of natural calamities turned disasters due to its geographical location. The area is in constant threat of the surface drainage effluent coming from Balochistan Plateaus and Local drains. The toxic and highly contaminated water from different drains has devastating and impact on the natural lakes and agricultural lands of the region. The natural flow routes of the flood water have been interrupted at many places which have increased the impact and frequency of the floods in the area. The investigated area is very famous for the paddy and wheat production in the country, but …
Innovative Ground Improvement For Liquefaction Control Near Charleston, South Carolina,
2013
Geopier Foundation Company, Davidson, NC
Innovative Ground Improvement For Liquefaction Control Near Charleston, South Carolina, Brian Metcalfe, Kord Wissmann, Kenneth Zur
International Conference on Case Histories in Geotechnical Engineering
Liquefaction remediation solutions often encompass high prevailing costs particularly in heterogeneous soil profiles. Common liquefaction control measures consist of deep foundations, soil mixing, and stone columns. Rammed Aggregate Pier methods have been used in the past two decades to support structures in cohesive and cohesionless soil profiles and control foundation settlements to building tolerances. These methods have recently been adapted to treat liquefiable soil profiles by improving the soil through densification, drainage, and shear stress redistribution. This paper focuses on a case history on Daniel Island, SC where a new variation of RAP methods, called the Rammed Compaction Point™ (RCP) …
Investigation On Geosynthetic Reinforced Two Layered Soil System,
2013
S. G. G. S. Institute of Engineering and Technology, India
Investigation On Geosynthetic Reinforced Two Layered Soil System, P. B. Ullagaddi, T. K. Nagaraj
International Conference on Case Histories in Geotechnical Engineering
Use of geosynthetics for flexible pavements founded on expansive soil subgrade is one of feasible and economic solution to minimize the undulation and required pavement thickness. In this present investigation the effect of inclusion of the geosynthetic reinforcement on California Bearing Ratio (CBR) value of a two layered soil system with black cotton soil at bottom and granular soil at top as a buffer layer, with different thickness configuration and geotextiles of different physical and mechanical properties was studied by laboratory and field California bearing ratio tests. Thickness of flexible pavement over the two layer soil system of different thickness …
Offshore Stone Columns Under Embankment With Embedded Pipes,
2013
Bechtel Power Corporation, Frederick, MD
Offshore Stone Columns Under Embankment With Embedded Pipes, Mohab Sabry, Mohamed A. Mostafa
International Conference on Case Histories in Geotechnical Engineering
A breakwater embankment was constructed as part of a settling basin for the intake of a thermal power plant in the north of Egypt. The 440-m long breakwater surrounds the intake basin which has an area of about 18000 m2. Sea water is supplied to the intake basin through 50 concrete pipes embedded in the breakwater. Subsurface soil conditions in the area indicated that the embankment would be founded on soft silty clay underlain by a layer of silty sand. Results from the settlement analysis showed that the embedded pipes could not tolerate the predicted differential settlement in …
Reducing Static Settlement Potential Using Prefabricated Wick Drains – A Case History,
2013
Earth Systems Pacific, San Luis Obispo, CA
Reducing Static Settlement Potential Using Prefabricated Wick Drains – A Case History, Judd J. King
International Conference on Case Histories in Geotechnical Engineering
Soft fine-grained soils subjected to heavy loads, such as those imposed by rigid structures or fill, have a high potential to consolidate over time. Depending upon subsurface conditions, soil consolidation can take many years to occur. This consolidation results in settlement, and subsequent differential settlement of the ground surface, which can have damaging consequences to structures. To reduce the potential for damage to structures due to consolidation settlement, various solutions have been devised by geoprofessionals. Such solutions include pile foundations, rigid mat/raft foundations, chemical stabilization, and over-excavation/replacement. Another method is the use of prefabricated wick drains in combination with a …
Response Of Piles Under A Combination Of Axial Static Loads And Lateral Harmonic Vibrations,
2013
University of Politecnico di Milano, Italy
Response Of Piles Under A Combination Of Axial Static Loads And Lateral Harmonic Vibrations, Ahmad Dehghanpoor
International Conference on Case Histories in Geotechnical Engineering
This paper presents a new mathematical method for analysis of piles under a combination of static and dynamic loads. In this study has been used the SSM (segment by segment method), which is verified using existing numerical and analytical solutions, is more efficient than the equivalent numerical solutions for example finite eminent methods. This method is useable inhomogeniouse soils. The characteristic effects of surrounding soil on the pile response are determined using stiffness and damping parameters of the soil - pile system. These effects can be taken into account if a proper soil reaction is employed. The soil reaction on …
Sedimentation Behavior Of Fly Ash-Kaolinite Mixtures,
2013
Missouri University of Science and Technology
Sedimentation Behavior Of Fly Ash-Kaolinite Mixtures, Xin Kang, Xiaoyi Zhao, Bate Bate
International Conference on Case Histories in Geotechnical Engineering
The sedimentation behavior of fine grained soil is largely dependent on its pore fluid chemistry. Different ionic concentration will lead to different fabrics of soil suspension, such as dispersion, aggregation, and flocculation. The ionic concentration also influences the thickness of the Diffuse Double Layer (DDL), which leads to the change in the final sediment volumes. Besides the ionic concentration influence, adding different amount of fly ash (FA) can also cause different sedimentation behaviors. The objective of this research was to quantify the interaction between fly ash and fine grained soils by comparing the influence of ionic concentration with that of …
Seismic Bearing Capacity Of Strip Footing Resting On Reinforced Earth Bed,
2013
Inderprastha Engineering College, India
Seismic Bearing Capacity Of Strip Footing Resting On Reinforced Earth Bed, Apoorva Agarwal, Swami Saran, S. Mukerjee
International Conference on Case Histories in Geotechnical Engineering
With an increase in demand for construction the use of poor soils becomes imperative. Soil bearing capacity and settlement play an important role in the design of foundations. Seismicity of the site is another important parameter in the design of the foundation for a structure. Hence seismic bearing capacity of soil becomes an important component in the design. In weak soils often deep foundations are recommended on account of the low soil bearing capacity available. In poor soils, ground improvement techniques are commonly used to improve the soil bearing capacity. Reinforcing earth with geo synthetic is one such technique adopted …
Selection Activity Optimization For A Geotextile-Ash System From Filtration Function Point Of View,
2013
Technical University of Civil Engineering, Romania
Selection Activity Optimization For A Geotextile-Ash System From Filtration Function Point Of View, Raluca Ioana Chirică, Liviu Tit Taloş
International Conference on Case Histories in Geotechnical Engineering
The paper presents a complex study concerning the fly ash deposits. It is known that the fly ash is an industrial by-product which is stored in landfills, with important implications on the environment. On this line, the general stability problem under different hydraulic and mechanical conditions was studied. Experimental and numerical analysis results are presented. The paper is about a fly ash embankment protected against erosion with different geotextile types. In order to obtain the main parameters of this compatibility problem, before performing a numerical analysis, some laboratory tests were undertaken. Conclusions were drawn regarding the optimum geotextile-fly ash filtration …
Settlement Of Large Embankment Construction Adjacent To A Buried Gas Pipeline — A Case History In Settlement Mitigation Using Lightweight Fill,
2013
Kleinfelder, Taylorsville, UT
Settlement Of Large Embankment Construction Adjacent To A Buried Gas Pipeline — A Case History In Settlement Mitigation Using Lightweight Fill, Bret N. Lingwall, Scott Anderson
International Conference on Case Histories in Geotechnical Engineering
As part of the $1.7 Billion I-15 CORE highway reconstruction project in Utah, several new or enlarged large embankments were constructed adjacent to existing buried utilities. Lightweight fill was selected as the technology to limit distress to the adjacent utilities. In order to estimate the impact from new construction to the utilities, settlement estimates for the lightweight embankment were performed using traditional settlement estimating techniques. Numerical models using FLAC3D were then performed to refined estimates. Estimates of lightweight embankment foundation settlements from this construction were obtained from the finite difference modeling. Three-dimensional numerical modeling was used in order to evaluate …
Simulation Of Inorganic And Organic Contaminants Transport In Sanitary Landfills,
2013
Motilal Nehru National Institute of Technology, India
Simulation Of Inorganic And Organic Contaminants Transport In Sanitary Landfills, R. P. Singh
International Conference on Case Histories in Geotechnical Engineering
The modelling of leachate generation and transport is important for estimating the possible groundwater pollution below the sanitary landfills. The numerical solution of the mathematical models for the total solids (inorganic) and chemical oxygen demand (organic) transport is presented. The existing one dimensional leachate transport model which accounts for advection and diffusion is modified with the addition of desorption term and the simulation results are compared for different case studies from the literature. The maximum error is reduced to 28.24 % with modified inorganic model against 38.93 % with the existing model for the TS concentration when simulated with literature …
Soil Liquefaction Analysis Based On Geotechnical Exploration And In Situ Test Data In The Tabriz Metro Line 2,
2013
Islamic Azad University, Iran
Soil Liquefaction Analysis Based On Geotechnical Exploration And In Situ Test Data In The Tabriz Metro Line 2, Mikail Yousefzadeh Fard, Mahyar Babazadeh, Pouya Yousefzadeh
International Conference on Case Histories in Geotechnical Engineering
Liquefaction is one of the most important and complex topics in geotechnical earthquake engineering. During this phenomenon, pore water pressure increases as long as it will be equal to confining stresses. Hence, the effective confining stress becomes zero and the soil will not have any shear resistance. As a result the soil mass is unstable and causes much destruction. In this research, according to information from boreholes of Tabriz Urban Train Line 2 all required parameters including total stresses, pore water pressures and effective stresses, the results according to soil type and water depth for all 53 preliminary boreholes were …
Soil Property Improvement Using Slag Binder,
2013
Penza State University of Architecture and Construction, Russia
Soil Property Improvement Using Slag Binder, Gennadii Boldyrev, Ilya Idrisov
International Conference on Case Histories in Geotechnical Engineering
In the majority of cases this is cement, which is used for soil improvement both for sandy soils and clays in order to increase its strength and reduce its compressibility. However this effect could be reached by using lime or in some cases slag binder for soil improvement. Comparing with cement and lime blast furnace slag used for improvement of soft clays prove more effective. Soils can be improved by means of wet soil mixing or dry soil mixing. The result is that we get a new composite material and its strength is much higher when comparing with natural soils. …
Stabilization And Reinforcement Of Slope With Geogrid: A Case Study,
2013
Asil sazan abnieh Co., Iran
Stabilization And Reinforcement Of Slope With Geogrid: A Case Study, Khashayar Hemmati, Seyed Vahid Masoomi, Javad Nazari Afshar
International Conference on Case Histories in Geotechnical Engineering
This paper presents a case study example of appropriate method selection of stabilization and reinforcement of slope by introducing engineering and economical aspects. Introduced slope is located in science and research campus of Islamic Azad University (IAU) in north of Tehran with height of 4-29 m and length of 370 m. A big building with 9 floors and total area of 70000 square meters is located upper and near edge of slope, so that existence of this building has increased sensitivity of projects design and construction method. Slope is located in vulnerable area with a high risk of seismicity based …
Stabilization Of Contaminated Soil By Dicalcium Phosphate,
2013
Payame Noor University, Iran
Stabilization Of Contaminated Soil By Dicalcium Phosphate, Amin Falamaki, Hossein Tavallali, Sharbanoo Rezanejad Farahmand
International Conference on Case Histories in Geotechnical Engineering
Stabilization of heavy metals contaminated soils using phosphate amendments is relatively a simple, quick and cheap method to reduce the transport of contaminants in the environment. The objective of this study is to stabilize the polluted soil using dicalcum phosphate (DCP). In this study a series of leachate column tests were conducted to find out the effect of DCP on Pb and Cu polluted soil. In addition, to understand the concentration of DCP on the efficiency of the method, different samples with different polluted soils were tested. DCP with 0.1, 0.2 and 0.5 mg/kg dry soil were added to the …
Static And Cyclic Triaxial Testing Of A Compacted Limestone Rockfill,
2013
Purdue University, West Lafayette, IN
Static And Cyclic Triaxial Testing Of A Compacted Limestone Rockfill, Hamid Fallah
International Conference on Case Histories in Geotechnical Engineering
The results of large scale static and cyclic triaxial tests for the Siah Bishe rockfill are presented. The test specimens are made of a modeled gradation with Dmax of 5 cm, reduced from the real Dmax of 80 cm by scalping method. Static triaxial tests resulted in the rockfill shear strength parameters within the expected range. The cyclic triaxial strength tests showed that the dam body rockfill failure criterion is not affected by earthquake loading. On the other hand, the cyclic triaxial parametric tests results were used to define shear modulus and damping curves of the compacted rockfill, …
Study Of Extent Of Soil Improvement By Employing Vibro-Compaction Technique,
2013
TATA Consulting Engineers Ltd., India
Study Of Extent Of Soil Improvement By Employing Vibro-Compaction Technique, Tejas Belani, Shailendra Nagrikar, Deepak Raj
International Conference on Case Histories in Geotechnical Engineering
India has seen a substantial growth in various Soil Improvement Techniques over last decade. A particular technique has been chosen based on Project location, Sub soil profile, Technical requirements, Time available and allowed budget for foundation. An expansion was planned for a leading fertilizer plant in North India. Project was located in high seismic zone having PGA of 0.24g. The site was underlain by liquefiable loose fine sands up to depth of 10m to 12m. Existing plant structures were built on Stone Columns few years back. This paper presents a case study where Vibro-compaction technique was successfully used to mitigate …
