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Articles 181711 - 181740 of 197221

Full-Text Articles in Engineering

Lipari Landfill: Leachate Containment System – Geotechnical Considerations, John Ramage Jun 1988

Lipari Landfill: Leachate Containment System – Geotechnical Considerations, John Ramage

International Conference on Case Histories in Geotechnical Engineering

The Lipari Landfill, located near Pitman, New Jersey, is a 16-acre former sand and gravel and waste disposal site that operated from 1958 through early 1970. This site was ranked the number one site in the U.S. EPA's first National Priority List of uncontrolled hazardous waste disposal sites. Site investigations and analysis of contamination both on- and off-site began in late 1979. Design of the Phase I remediation, consisting of encapsulation utilizing a vertical barrier keyed into a relatively impermeable clay layer and a cover over the entire site, began in late 1982. Construction of the leachate containment system began …

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Model Test Of Reinforced Earth Retaining Wall, A. S. Stipho Jun 1988

Model Test Of Reinforced Earth Retaining Wall, A. S. Stipho

International Conference on Case Histories in Geotechnical Engineering

Reinforced Earth techniques are fast growing procedures within geotechnical engineering practice. The ease and flexibility of the techniques make them widely accepted. In the last two decades, considerable advances have been realized in utilization of concepts in retaining structures. The analysis and design procedures for earth reinforced retaining walls had been exercised within Rankin and Mohr Coulomb theory. An earth retaining model wall was designed according to Mohr Coulomb theory with minimum factor of safety. The wall was constructed in the laboratory in much the same way as the large walls in the fields. The wall was then brought to …

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Movement In The Powerhouse Excavation Saguling Project, Indonesia, George F. Sowers Jun 1988

Movement In The Powerhouse Excavation Saguling Project, Indonesia, George F. Sowers

International Conference on Case Histories in Geotechnical Engineering

Ground expansion and finally sliding occurred in one corner of the 25 m deep open excavation for the powerhouse. The movement occurred in a slickensided claystone overlain by water bearing sandy gravel. The cause was expansion of the claystone followed by its weakening from water pressure in the open slickensided cracks. The excavation was finally stabilized by drainage plus reinforced sloping walls restrained by cable anchors in the rock below. The paper summarizes the pertinent soil and rock properties and describes the analyses of the movements, the corrective measures and their varied performance, an9 the professional lessons to be gained.

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Partial Underpinning A Five-Storey Building, Phung Duc Long, Nguyen Van Quang, Bo Berggren Jun 1988

Partial Underpinning A Five-Storey Building, Phung Duc Long, Nguyen Van Quang, Bo Berggren

International Conference on Case Histories in Geotechnical Engineering

Partial underpinning is often not accepted because of dangerous damage that may be caused by the redistribution of stresses in the superstructure. A five-storey building was partially underpinned successfully. To give stability to the building only a small number of piles, about 70% fewer than with the conventional method, were used. The results observed have proved the success of the partial underpinning.

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Performance Evaluation Of Pile Foundation Using Cpt Data, Keith D. Tucker Jun 1988

Performance Evaluation Of Pile Foundation Using Cpt Data, Keith D. Tucker

International Conference on Case Histories in Geotechnical Engineering

The Southern California Edison Company (SCE) has utilized cone penetrometer test (CPT) data for design of concrete drilled shafts and driven piles at various facilities over the past seven years with substantial cost savings in field exploration and foundation design. This paper incorporates a performance evaluation of drilled shafts and driven piles to predict the uplift load versus deflection curves based on the embedded length to diameter ratio of each foundation. A revised design methodology is presented to correlate the side friction values from CPT data with field uplift load test results in granular and cohesive soils.

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Post-Tensioned Caissons Permit Interstate Construction: A Case History, A. Joseph Nicholson Jr., John R. Wolosick Jun 1988

Post-Tensioned Caissons Permit Interstate Construction: A Case History, A. Joseph Nicholson Jr., John R. Wolosick

International Conference on Case Histories in Geotechnical Engineering

Due to severe right of way restrictions associated with the relocation and widening of Interstate 85 in Atlanta Georgia, a special post-tensioned caisson retaining wall was constructed within 12 inches of an adjacent parking garage and office building. National Foundation Company's design for the twenty foot high retaining structure was used in lieu of an L-shaped cantilevered concrete retaining wall that required extensive temporary shoring for construction. The caisson wall was instrumented and monitored during and after construction using slope indicators and optical survey.

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Predicting Performance Of Large-Diameter Buried Flexible Pipes: Learning From Case Histories, Koon Meng Chua, Larry J. Petroff Jun 1988

Predicting Performance Of Large-Diameter Buried Flexible Pipes: Learning From Case Histories, Koon Meng Chua, Larry J. Petroff

International Conference on Case Histories in Geotechnical Engineering

Analytical approaches to predicting pipe deflections are based on the predetermined pipe properties, the anticipated soil properties and on the assumption that the specified installation configuration can be met. However, in-place pipe deflections do often deviate from the predicted. This paper summarizes the observations made from more than twenty case histories of entrenched large-diameter flexible high density polyethylene pipes and discusses the effects of construction methods and site conditions on pipe performance. Procedures are also presented on how site conditions and construction methods can be accounted for when using the TAMPIPE (Texas A&M PIPE) method and the Spangler's method. Procedures …

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Reconstruction Of The Settlement History Of Building, G. Hannink Jun 1988

Reconstruction Of The Settlement History Of Building, G. Hannink

International Conference on Case Histories in Geotechnical Engineering

Although it is a well-known fact that buildings can settle, it is often not known how much settlement has occurred since the construction. Three case studies in the Netherlands are presented which deal with the following questions: has the settlement process stopped or is it continuing and if so, what settlements can still be expected in the future? All three cases show large settlements of up to a maximum of 0.8 m since construction. This paper shows how the magnitude of the settlement since the construction can be reconstructed by analysing settlement data, covering only a relatively short period of …

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Repair And Rehabilitation Of A Residential Building At Nile River In Cairo, Sayed Abdel-Salam, Mohsen Mashhour Jun 1988

Repair And Rehabilitation Of A Residential Building At Nile River In Cairo, Sayed Abdel-Salam, Mohsen Mashhour

International Conference on Case Histories in Geotechnical Engineering

Five floors were added to a six storey building during its construction without carrying out necessary structural calculations. When such calculations were later performed they revealed that both the spread footing foundation and many columns were unsafe. The contact pressure beneath footings exceeded the allowable soil pressure. The repair method described in this paper depended on disregarding the spread footing foundation and constructing a new deep foundation system for the existing building. This consisted of end bearing bored piles drilled and cast in the voids between the footings using a special low rise rig. The piles were connected to a …

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The Case Record Of Ba-Yu-Quan Anchor Slab Retaining Wall, Z. S. Zhang, D. Z. Luan, X. X. Zhang Jun 1988

The Case Record Of Ba-Yu-Quan Anchor Slab Retaining Wall, Z. S. Zhang, D. Z. Luan, X. X. Zhang

International Conference on Case Histories in Geotechnical Engineering

Anchor slab retaining wall is a kind of retaining structure, which consists of prefabricated rib-columns, panel slabs, tie-bars and anchor slabs embedded in earth fill. Since the structure was first used and developed in China in 1974, many such structure have been built on railways and other engineering projects. The reviewer of Second International Conference on Case Histories in Geotechnical Engineering gave a comments about this structure as follows: "Chinese method anchor slab the construction should interest the western world". Ba-Yu-Quan anchor slab retaining wall has been instrumented to measure the load on the tie-bar, the horizontal displacement of the …

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The Effects Of Mining Subsidence On A Motorway Bridge, C. J. F. P. Jones Jun 1988

The Effects Of Mining Subsidence On A Motorway Bridge, C. J. F. P. Jones

International Conference on Case Histories in Geotechnical Engineering

Mining subsidence causes ground movements which are imposed on any structure in the area of influence. Bridges are particularly susceptible to subsidence, which frequently causes damage and occasionally collapse. Special bridge designs have been developed to cater for mining subsidence. This paper provides details of the performance of such a structure subjected to significant ground strain.

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Driven Pile Foundation In Coral Sand, Jeddah, Saudi Arabia, Waddah Akili Jun 1988

Driven Pile Foundation In Coral Sand, Jeddah, Saudi Arabia, Waddah Akili

International Conference on Case Histories in Geotechnical Engineering

Tubular steel piles, 1.42 meter in diameter, were driven into coral and coral contaminated sands to support marine structures on the Red Sea coast of Saudi Arabia. The paper describes the design evolution process, highlights the pile test program conducted on site to verify design and compares pile design penetration with actual penetration lengths. Despite corrections introduced to the design using site-specific load tests; the final design overestimated capacities in over 50 per cent of the total piles driven. The unpredictable and erratic pile behaviour observed during pile driving ascertains the need for more appropriate pile design and installation methodology …

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Illicon Analysis Of Ellingsrud Test Fill, G. Mesri, D. O. K. Lo, K. Karlsrud Jun 1988

Illicon Analysis Of Ellingsrud Test Fill, G. Mesri, D. O. K. Lo, K. Karlsrud

International Conference on Case Histories in Geotechnical Engineering

The 50-m diameter test fill at Ellingsrud, Norway was constructed by NGI to determine preconsolidation pressure of a soft clay, mobilized under field conditions. The height of the fill was increased in four increments during 1972 to 1978. Settlement observations as well as pore water pressure measurements over a period of eleven years are used to evaluate predictions made by the ILLICON computer program. ILLICON analysis requires vertical profiles of compressibility and permeability parameters. The computed surface settlements are within 2 cm of the measured values during the first three loading stages. After the fourth loading, there is a larger …

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Prediction And Performance Of Piles Under Static And Dynamic Loads, Shamsher Prakash, Karunakar Sreerama, Sally Prakash Jun 1988

Prediction And Performance Of Piles Under Static And Dynamic Loads, Shamsher Prakash, Karunakar Sreerama, Sally Prakash

International Conference on Case Histories in Geotechnical Engineering

Pile driving changes the soil properties for use in analysis of piles under lateral static and dynamic loads. In this study, the analytical predictions of pile group use soil and pile data obtained from tests on a single pile. The group predictions are compared with field and laboratory test results for both static and dynamic lateral response. A reasonably good agreement is found between the computed and measured dynamic response.

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Settlement Predictions In Residual Soils By Dilatometer, Pressuremeter And One-Dimensional Compression Tests: Comparison With Measured Field Response, Roy H. Borden, William J. Sullivan, Weichen Lien Jun 1988

Settlement Predictions In Residual Soils By Dilatometer, Pressuremeter And One-Dimensional Compression Tests: Comparison With Measured Field Response, Roy H. Borden, William J. Sullivan, Weichen Lien

International Conference on Case Histories in Geotechnical Engineering

A case study investigating settlement predictions based on data from one dimensional compression, pressuremeter (PMT) and dilatometer (DMT) tests is presented. A relationship is established between PMT and DMT evaluated moduli and the standard penetration N values. These relationships are utilized in the settlement computations. The predictions obtained by each method are compared to the actual measured settlement. The column location at which settlement observations were made was instrumented with strain gages to measure the actual applied loads. A comparison between actual and design loads is made. Settlement predictions using PMT were performed utilizing two different existing approaches. A distinction …

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Stress Analysis Of Gravity Dam Founded On Rock Mass Having Horizontal Seam (A Case Study Of Bargi Dam In Madhya Pradesh, India), J. K. Jain, R. K. Khare Jun 1988

Stress Analysis Of Gravity Dam Founded On Rock Mass Having Horizontal Seam (A Case Study Of Bargi Dam In Madhya Pradesh, India), J. K. Jain, R. K. Khare

International Conference on Case Histories in Geotechnical Engineering

Under certain situations where horizontal seams of weaker material are detected below a depth of relatively competent rock and if it is decided to found the base of the dam on the rock below weak seam, the current practice of extending the triangular profile right down to base proves to be uneconomical both in terms of cost of excavation and quantity of concrete. In such situations for realistic assessments it becomes imperative to study the effect of foundation block having seam, on the behaviour of entire dam structure. With a view to assist the design of such dams, results of …

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Preface, Shamsher Prakash Jun 1988

Preface, Shamsher Prakash

International Conference on Case Histories in Geotechnical Engineering

No abstract provided.

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Disclaimer, Multiple Authors Jun 1988

Disclaimer, Multiple Authors

International Conference on Case Histories in Geotechnical Engineering

No abstract provided.

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Table Of Contents, Multiple Authors Jun 1988

Table Of Contents, Multiple Authors

International Conference on Case Histories in Geotechnical Engineering

No abstract provided.

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Conference Snapshots, Multiple Participants Jun 1988

Conference Snapshots, Multiple Participants

International Conference on Case Histories in Geotechnical Engineering

No abstract provided.

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A Geotextile Reinforced Embankment For A Four Lane Divided Highway – U.S. Hwy. 45, West Bend, Wisconsin, B. R. Christopher, A. B. Wagner Jun 1988

A Geotextile Reinforced Embankment For A Four Lane Divided Highway – U.S. Hwy. 45, West Bend, Wisconsin, B. R. Christopher, A. B. Wagner

International Conference on Case Histories in Geotechnical Engineering

Geotextile reinforcement was used to construct an embankment for a four lane divided highway over up to 22 feet of low strength peat. The embankment had heights up to 7 feet. Special field testing and conventional laboratory tests were performed to measure the shear strength and compressibility. Stability analysis indicated that geotextile reinforcement could be used to construct a stable embankment on the peat deposit, provided the geotextile had sufficient strength to prevent rotational shear failure and to limit lateral deformation of the embankment. Construction of the embankment was begun in late summer of 1984. The highway opened for traffic …

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Accelerated Consolidation Of Soft Clays Using Wick Drains, J. R. Davie, M. R. Lewis, L. W. Young Jr. Jun 1988

Accelerated Consolidation Of Soft Clays Using Wick Drains, J. R. Davie, M. R. Lewis, L. W. Young Jr.

International Conference on Case Histories in Geotechnical Engineering

Construction of the New Istana for the Sultan of Brunei required that fill slopes up to 85 feet high be placed on very soft compressible floodplain soils. Wick drains installed in the soft sediments accelerated their consolidation and reduced long-term settlements. The consolidation also produced a strength increase in the soft soils that allowed the fill to be constructed without danger of a major base slip failure. Instrumentation installed in the floodplain soils provided data on excess porepressures built up during the fill placement, and on the resulting settlements. The measured porepressures and settlements were in good agreement with the …

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Advances In The Construction And Design Of Jet Grouting Methods In South America, Giorgio Guatteri, Joseph L. Kauschinger, Antonio C. Doria, Edward B. Perry Jun 1988

Advances In The Construction And Design Of Jet Grouting Methods In South America, Giorgio Guatteri, Joseph L. Kauschinger, Antonio C. Doria, Edward B. Perry

International Conference on Case Histories in Geotechnical Engineering

This paper presents a brief historical development of the two most popular jet grouting methods used in South America, namely, the chemical churning pile method (CCP) and jumbo jet grouting. Advantages and limitations of each procedure are cited. A brief discussion follows covering the history of CCP jet grouting in South America. Field trials performed to improve the design methodology and construction of CCP and jumbo jet grouted columns are presented. Finally, three case histories are presented to illustrate the use of jumbo jet grouting where limited head room exists, jet grouting in close proximity to pile supported structures, formation …

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Behaviour Of A Geogrid Reinforced Embankment Over Waste Material, P. Rimoldi, D. Cazzuffi, A. Pagotto Jun 1988

Behaviour Of A Geogrid Reinforced Embankment Over Waste Material, P. Rimoldi, D. Cazzuffi, A. Pagotto

International Conference on Case Histories in Geotechnical Engineering

The paper deals with the monitoring of a geogrid reinforced embankment, 5.0 m high and 600 m long, built to contain additional waste material in the municipal landfill in Modena (Northern Italy). The embankment was founded directly over the waste already placed in the landfill, consisting of' compressible and dishomogeneus material, varying from solid urban waste to muddy industrial material. The geotechnical parameters assumed to characterize the fill soil and the waste material of the foundation soil are described. The settlements of the embankment and the forces and strains in the geogrids were monitored from the beginning of the construction …

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Case Histories Of Foundations With Stone Columns, K. R. Dayte, M. R. Madhav Jun 1988

Case Histories Of Foundations With Stone Columns, K. R. Dayte, M. R. Madhav

International Conference on Case Histories in Geotechnical Engineering

The paper presents case histories of performance of foundations where stone columns were provided, along with relevant data regarding structural systems, soil conditions, construction methods and field control criteria. A wide range of applications are included comprising stone columns for area treatment and stone column in small and large groups for isolated footings, pipe pedestals and bridge abutments. In some of the cases design load exceeded the estimated yield load over a part of the stone column length yet collapse did not occur because the soil stress around the stone column increased as more load was passed on to the …

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Compaction And Chemical Grouting For Drain Tunnels In Phoenix, T. J. Lyman, M. J. Robison, D. S. Lance Jun 1988

Compaction And Chemical Grouting For Drain Tunnels In Phoenix, T. J. Lyman, M. J. Robison, D. S. Lance

International Conference on Case Histories in Geotechnical Engineering

Ground runs during ml.m.ng of the Papago Freeway Drain Tunnels posed significant potential risk to utilities, street pavement, and buildings located above and adjacent to one of the three tunnel alignments. Ground response to the larger ground runs resulted in open chimneys and settlement of the ground surface of up to several feet. Modifications to the tunneling machine included addition of poling plates and breasting boards. Further modification to the tunneling method included use of compaction grouting in conjunction with mining for the entire length of one tunnel alignment, and use of chemical grouting to prestabilize the ground surrounding the …

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Construction Of A Double Tunnel With Ground Windows, Helmut Meissner, Günter Borm Jun 1988

Construction Of A Double Tunnel With Ground Windows, Helmut Meissner, Günter Borm

International Conference on Case Histories in Geotechnical Engineering

A double tunnel of 6.3 m height has been driven in loess underground of low friction and relatively large capillary cohesion. To attain a tunnel climate corresponding to natural underground conditions, earth windows were provided along the side walls of the tunnel. The portal was supported by steel profiles, anchors and a shotcrete layer. The stability of the retaining construction was ensured by two independent methods. A preexcavation of the tunnel was found to be necessary. The works were performed simultaneously with excavation of the hillside facing the portal. The tunnel lining consists of reinforced shotcrete. The bearing behaviour of …

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Demonstrating Borehole Drilling Accuracy At The Navajo Dam, Stephen J. Kravits, Hunter C. Harrel Jun 1988

Demonstrating Borehole Drilling Accuracy At The Navajo Dam, Stephen J. Kravits, Hunter C. Harrel

International Conference on Case Histories in Geotechnical Engineering

The U.S. Bureau of Mines recently demonstrated the accurate directional drilling of a near-horizontal borehole with the objective of intercepting a designated target. The project was conducted at the Navajo Dam for the Bureau of Reclamation, U.S. Department of the Interior. The Bureau of Reclamation's objective was to determine the feasibility of accurately drilling long near-horizontal boreholes, from the surface, in lieu of constructing a tunnel under an embankment dam from which shorter boreholes would be accurately drilled to control water seepage. As a result of the demonstrated drilling accuracy, the Bureau of Reclamation can consider the option of using …

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Design And Monitoring Of Earth Embankments Over Permafrost, S. Dufour, A. S. Judge, P. Lafleche Jun 1988

Design And Monitoring Of Earth Embankments Over Permafrost, S. Dufour, A. S. Judge, P. Lafleche

International Conference on Case Histories in Geotechnical Engineering

As the northern regions of Canada are developed, there is an increasing need to protect the fragile ecology as well as to maximize usage of local construction materials. The construction of earth dykes to retain liquid wastes is a common requirement in municipal and industrial developments. Frozen core earthfill dykes provide an effective technique to cut off seepage in cold permafrost areas (Sayles, 1984). The seepage of water through an unfrozen overburden or fractured bedrock foundation can occur and accelerate the thermal deterioration of an earth embankment. The development of the active layer during the summer reduces the dam's ability …

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Distribution Of Contact Pressure And Stresses Under Skirted Footings, M. L. Ohri, A. Singh, G. R. Chowdhary Jun 1988

Distribution Of Contact Pressure And Stresses Under Skirted Footings, M. L. Ohri, A. Singh, G. R. Chowdhary

International Conference on Case Histories in Geotechnical Engineering

Skirted footings posses many novel characteristics which render them eminently suitable for construction of structures in situations involving heavy loads and poor soil conditions with promise of economy. The results of the present investigations will help considerably to understand a detailed picture of the complex phenomenon of contact pressure distribution and vertical stress distribution in soil under skirted footings.

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