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Full-Text Articles in Engineering
Epoxy Resin Grout System For Solutions To Traditional Geotechnical Problems, A. V. Shroff, D. P. Amin, D. L. Shah
Epoxy Resin Grout System For Solutions To Traditional Geotechnical Problems, A. V. Shroff, D. P. Amin, D. L. Shah
International Conference on Case Histories in Geotechnical Engineering
Use of chemicals for foundation treatment and sealing of crack is of recent origin. The aim of this paper is to find time-viscosity and time-strength relationships of epoxy grout system for proper flow mechanism and strength interaction with rock collected from dam sites of India. The bonding mechanism of gel in the injected mass is explained with the help of Scanning electron microscopy and Infra-red spectroscopy. After trial field grouting the stratascopy has revealed better bonds of moist surface with flexibility to accommodate movement before bond or shear failure occurred and had lower volumetric shrinkage during curing.
Evaluation Of The Effect Of Saturated Silty And Fine Sand Foundation Improved By Vibro-Flotation In Seismic Area, Wang Yuqing, Zhang Weiquan, Qiao Taiping
Evaluation Of The Effect Of Saturated Silty And Fine Sand Foundation Improved By Vibro-Flotation In Seismic Area, Wang Yuqing, Zhang Weiquan, Qiao Taiping
International Conference on Case Histories in Geotechnical Engineering
The improvement of liquefaction foundations in seismic region has been concerning many engineers. The authors had carried out experimental studies on the improvement of saturated silty and fine sand foundations at the suburbs of Beijing by vibroflotation method. The test results are described and the improvement effects are evaluated in this paper.
Experience In Ground Improvement By Dynamic Compaction And Preloading At Half Moon Bay – Saudi Arabia, N. Ghosh, M. M. Tabba
Experience In Ground Improvement By Dynamic Compaction And Preloading At Half Moon Bay – Saudi Arabia, N. Ghosh, M. M. Tabba
International Conference on Case Histories in Geotechnical Engineering
Ground improvement techniques were used to meet the design requirements for a beach resort complex at Half Moon Bay on the Arabian Gulf. Extensive site exploration revealed upper layers consisting of loose to medium fine sand, having variable silt content. The original specification called for filling and ground improvement using Dynamic Compaction to achieve 100kN/m2 surface bearing capacity and 50% relative density at a depth of 10m. Dynamic Compaction (DC) and subsequent field testing, using full scale loading tests as well as CPT and SPT tests, proved that it was possible to achieve these requirements over most areas using …
Field Measurement On A Slope Cutting With Tensile Inclusions, Tamotsu Matsui, Ka Ching San, Terumasa Amano, Yoshinori Otani
Field Measurement On A Slope Cutting With Tensile Inclusions, Tamotsu Matsui, Ka Ching San, Terumasa Amano, Yoshinori Otani
International Conference on Case Histories in Geotechnical Engineering
In a road widening project, tensile inclusions were used to stabilize some parts of cut slope works. The site condition and the construction of reinforced slope cutting are presented. A full scale field test on a reinforced cut slope was performed being incorporated with this road widening project. The field test consisted of a field loading test and a field excavation test. Details of the field test, field measurements and site observation are presented. Finite element analysis of the field test is performed. Based on the field measurements together with the analytical results, the reinforcement mechanism of a reinforced cut …
Foundations On Stone Columns Resting On Coralline Limestone, K. S. A. Rahim, A. W. Dhowian
Foundations On Stone Columns Resting On Coralline Limestone, K. S. A. Rahim, A. W. Dhowian
International Conference on Case Histories in Geotechnical Engineering
The subsoil conditions along the Red Sea coast in Saudi Arabia are complex due to existence of very thick beds of coralline limestone of recent geological origin. These coral beds are soft, porous and nonhomogeneous. They are often interspaced with large cavities and soft sandwiched layers of finer particles. Analysis of the subsoil conditions to a fifty meter depth based on data from deep boreholes, Standard Penetration Tests (SPT), Quasi Static Cone Tests (DCT) and large size Plate Load Tests is presented. The strength and compressibility characteristics of the strata and the correlation factors for the SPT and DCT in …
Geogrid Reinforced Soil Retaining Wall On Compressible Soils, R. L. Curtis, V. E. Chouery-Curtis, D. A. Miller
Geogrid Reinforced Soil Retaining Wall On Compressible Soils, R. L. Curtis, V. E. Chouery-Curtis, D. A. Miller
International Conference on Case Histories in Geotechnical Engineering
A geogrid reinforced soil wall with a wrap-around facing system was successfully constructed on soft, compressible alluvial and residual soils. An originally designed 20-foot (6.1 m) high, reinforced concrete cantilever retaining wall was not constructed because of the expected settlements induced by the wall and backfill. The geogrid reinforced wall was utilized because of its ability to withstand the estimated settlement and because it was considered less expensive than providing deep foundation support of a cantilever wall. This paper discusses the design, construction, and performance of the geogrid reinforced wall.
Geotechnical Studies Of Foundation Of A Tilted Tank At Parikshatgarh, India, G. C. Nayak, B. Singh, P. K. Jain
Geotechnical Studies Of Foundation Of A Tilted Tank At Parikshatgarh, India, G. C. Nayak, B. Singh, P. K. Jain
International Conference on Case Histories in Geotechnical Engineering
An overhead tank of 200 KL capacity and 9 m staging was constructed in year 1975 at the ancient historical site at Parikshatgarh, Meerut, India. The depth of foundation is 1.6 m and inner and outer diameters of annular raft is 6.8 m and 10.3 respectively. In year 1978, the overhead tank was observed to be tilted. Detailed geotechnical studies have been conducted in 1987 to find out the causes of tilting of the tank and tilts have been measured every month for last one year. It is interesting to note that in spite of severe tilt of 4.3 cm/meter …
Impact Of Tunneling On Two Brick-Bearing-Wall Structures, Marco D. Boscardin
Impact Of Tunneling On Two Brick-Bearing-Wall Structures, Marco D. Boscardin
International Conference on Case Histories in Geotechnical Engineering
The responses or a pair or brick-bearing-wall structures to nearby construction or twin, shield driven 21-ft-diameter tunnels in soil are examined. Horizontal and vertical ground displacements are summarized and discussed, as well as, horizontal and vertical displacements, tilting, distortion, and damage sustained by the structures. Transient features or the developing settlement trough and effects on building response are also examined and discussed.
Long Term Building Performance Over An Injected Subgrade, Ronald F. Reed, Paul Wright
Long Term Building Performance Over An Injected Subgrade, Ronald F. Reed, Paul Wright
International Conference on Case Histories in Geotechnical Engineering
Several foundation designs and stabilization methods are used with varying degrees of success to cope with the problem of expansive clays. Many of these methods are very expensive, therefore alternate technology that is both cost and performance effective has been developed. This paper presents a case history with pre- and post- stabilization test data for a 4-building project where pressure injection of lime and water was used to preswell weathered clay-shale to a depth of 10 feet. Use of pressure injection technology economically reduced post construction movements to 0.5 inches to 1.8 inches over a 7 year monitoring period. Movements …
Oversteepened Slopes Reinforced With Tensar Geogrid, James E. Laier, Robert M. Mattox
Oversteepened Slopes Reinforced With Tensar Geogrid, James E. Laier, Robert M. Mattox
International Conference on Case Histories in Geotechnical Engineering
This paper describes geotechnical design concepts used in developing 45-degree and 56-degree embankment slopes to meet strict stability criteria. Typical design sections are presented along with example stability computations to illustrate factors of safety developed under static and rapid drawdown conditions. This paper also discusses pertinent, site specific aspects of construction considered germane to successful, long term performance of oversteepened slopes at this site.
Performance Of Lpg Storage Tanks On Ground Improved By Stone Columns, E. R. Farrell, T. L. L. Orr, T. O'Donovan
Performance Of Lpg Storage Tanks On Ground Improved By Stone Columns, E. R. Farrell, T. L. L. Orr, T. O'Donovan
International Conference on Case Histories in Geotechnical Engineering
This paper describes the construction of four large tanks on poor soil conditions consisting of hydraulic fill placed over estuarine silt in Dublin port. The limited differential settlement that could be tolerated by the tanks required that they could not be placed on the existing ground. The optimum solution was found to be ground treatment using vibro-replacement with the formation of stone columns and compaction of the fill. The paper describes the design method used and the control tests. The predicted settlements are compared with settlement readings of the tanks following construction. These show that the chosen solution has performed …
Performance Of Prefabricated Drains In Soft Soils, R. David Charles
Performance Of Prefabricated Drains In Soft Soils, R. David Charles
International Conference on Case Histories in Geotechnical Engineering
The use of vertical drains to accelerate the consolidation of soft soils has become a cost effective alternative to the use of pile foundations at many sites. This paper presents a case history of the use of vertical drains to accelerate the consolidation of 20 to 25 feet of low shear strength, highly compressible soils, under embankments of 12 to 25 feet in height. Two separate vertical drain installations at the project site allowed the use of a shallow foundation system for approximately one-half of the foundations. This resulted in a significant savings in foundation costs and allowed an ambitious …
Progress In The Use Of Natm For The São Paulo Subway, T. B. Celestino, O. A. Ferrari, C. T. Mitsuse, L. C. Domingues
Progress In The Use Of Natm For The São Paulo Subway, T. B. Celestino, O. A. Ferrari, C. T. Mitsuse, L. C. Domingues
International Conference on Case Histories in Geotechnical Engineering
The first time that the New Austrian Tunnelling Method (NATM) was used for underground works in the Sao Paulo Subway was in 1981. Since that time, significant progress has been achieved in successfully optimizing the support and lowering the construction costs. This paper will describe the latest experience of two single-track parallel tunnels excavated in 1986 through tertiary stiff clay. All the experience accumulated in previous jobs led to design improvements, such as (1) no steel ribs for support along 72% of the tunnels length (2) no temporary invert, and (3) no spiles, forepoles, soil grouting or any other type …
Recent Examples Of Cut And Fill Reinforcement On A41-Highway In France, Trân Vô Nhiêm
Recent Examples Of Cut And Fill Reinforcement On A41-Highway In France, Trân Vô Nhiêm
International Conference on Case Histories in Geotechnical Engineering
At EVIRES PASS, between ANNECY and MONT BLANC in FRANCE, subsoil is made up of unstable clayey natural versants and marly bedrock affected by previous or current slidings. The problems encountered during the new A41-Highway construction were aggravated by the proximity of Road and Railway located on top of the same versant. The final Design consisted of succession of cuts and embankments with special soil reinforcement techniques to improve stability. So two existing unstable Railway embankments were promptly consolidated by "soil nailing" with driven steel dowel-piles which were either anchored or not. Two other high cuts in marls and sandstones …
Reinforced Soil In The Repair Of Embankment And Cutting Slip Failures, James Paul
Reinforced Soil In The Repair Of Embankment And Cutting Slip Failures, James Paul
International Conference on Case Histories in Geotechnical Engineering
The paper considers the causes of slips in embankments and cuttings and examines the traditional methods of repair and reinstatement. Reinforced soil solutions are examined and compared with the more traditional systems. Following consideration of the structure and properties of a polymer geogrid for use in reinforced soil applications, two case histories are presented. The first involves the repair of a cutting slip in overconsolidated clay in S.E. England. Both the design method and construction system are examined along with indications of relative costs. The second example is a slip in a highway embankment in Sweden where a reinforced soil …
The Performance Behaviour Of A Grain Silo Foundation In Jeddah Supported On Stone Columns, D. L. Jones, G. J. Macdonald, M. H. Golder
The Performance Behaviour Of A Grain Silo Foundation In Jeddah Supported On Stone Columns, D. L. Jones, G. J. Macdonald, M. H. Golder
International Conference on Case Histories in Geotechnical Engineering
This paper describes the ground treatment carried out and the subsequent load settlement behaviour of a grain silo in Jeddah, Saudi Arabia. Predicted performance based on the results of both SPT and cone penetration tests are compared with actual behaviour. The prediction based on the SPT results is poor, with the cone penetration analyses giving a significant improvement. A knowledge of cone resistance and hence modulus values for the full depth of influence of the silo would have further refined the prediction.
The Rehabilitation Of Terminal 2 – A Case History, D. J. Hardin, M. L. Byington, S. V. Mills
The Rehabilitation Of Terminal 2 – A Case History, D. J. Hardin, M. L. Byington, S. V. Mills
International Conference on Case Histories in Geotechnical Engineering
The Port of Portland, Oregon recently completed the rehabilitation of the downstream portion of Terminal 2. The project included the placement of more than 1 million cy of dredged hydraulic sand fill and the construction of a 1,400-ft-long pile-supported wharf. Up to 60 ft of sand fill was placed over soft, submerged sediments. The silt along the toe of the slope was removed prior to placing the fill. No shear failures or mudwaves were detected during filling. The fill induced settlements of up to 63 in., which agreed well with the predicted maximum settlement of about 60 in. Underwater sand …
The Use Of Synthetic Liner And/Or Soil-Bentonite Liner For Groundwater Protection, Harl D. Sharma, Paul Kozicki
The Use Of Synthetic Liner And/Or Soil-Bentonite Liner For Groundwater Protection, Harl D. Sharma, Paul Kozicki
International Conference on Case Histories in Geotechnical Engineering
This paper briefly reviews the various liner materials, their properties and applications to prevent contaminate spread into the groundwater. Following this, two cases have been described that cite the use of two liner types for this purpose. One case provides the details of designing the reinforced CPE liner and its under-drainage system to store the fluids at a new petrochemical plant. The second case provides the details of designing and constructing a soil-bentonite liner for aerated lagoon facilities.
Vertical Excavation Below Footing Solved By Compaction Grouting, Harry Grice, Ernest T. Mosley, Richard M. Berry
Vertical Excavation Below Footing Solved By Compaction Grouting, Harry Grice, Ernest T. Mosley, Richard M. Berry
International Conference on Case Histories in Geotechnical Engineering
One of the problems regularly facing engineers in designing additions to buildings or other structures is dealing with excavating for footings directly adjoining existing footings but at a deeper level. This was accomplished in sandy soils economically and quickly for a noted Conference Center in 1983 by using compaction grouting. Compaction piles were utilized to pick up existing loads as well as the horizontal loads which would normally allow the building to tip, settle and crack. We believe this was the first use of compaction piles as "anchor" piles to pick up horizontal loads. By using this process, the sandy …