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Articles 177511 - 177540 of 197991

Full-Text Articles in Engineering

Behavior Of Laterally Loaded Drilled Shafts In Stiff Soil, A. J. Lutenegger, G. A. Miller Jun 1993

Behavior Of Laterally Loaded Drilled Shafts In Stiff Soil, A. J. Lutenegger, G. A. Miller

International Conference on Case Histories in Geotechnical Engineering

Results of lateral load tests on four drilled shafts installed in stiff cohesive soil are presented. Predictions of the load/displacement behavior were made using p-y curves generated from the results of Prebored Pressuremeter and Dilatometer Tests. A new method to develop p-y curves from the DMT is presented and discussed.

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Case Histories Of Bored Pile Foundations, T. Z. Rao Jun 1993

Case Histories Of Bored Pile Foundations, T. Z. Rao

International Conference on Case Histories in Geotechnical Engineering

A kind of bored pile with large diameter is being used in civil engineering in China. The maximum length in earth of the pile is greater than 100 m. This pile may be built in rock. In the paper, the constructing methods of the bored pile foundation of a bridge and a grade separation are described. Relating the result with its cause, the failure of the bored pile in construction, the cause of the failure and the treatment methods are related.

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Case History Of Foundation Design For 50000 M3 Oil Tank, Hai-Chen Hsu Jun 1993

Case History Of Foundation Design For 50000 M3 Oil Tank, Hai-Chen Hsu

International Conference on Case Histories in Geotechnical Engineering

This paper introduces the case history of foundation design for 50000 m3 oil tank in collapsible loess region. After field deep blasting test and laboratory soil test, author design deep Explosion-Squeeze-Foundation under the foundations of two oil tanks in a refinery for refining 5 million tons of crude oil per year. Diameter of E.S.F. :D1=66.43m; thickness of E.S.F.: H1=12m. It was the largest engineering practice in collapsible loess region in China in 1979 that deep foundation of 50000 cubic meter oil tanks are built by explosion squeeze technique first time.

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Damage Of A Broadcasting Station Due To Shrinkage Of Soil, M. A. El-Sohby, A. M. Elleboudy Jun 1993

Damage Of A Broadcasting Station Due To Shrinkage Of Soil, M. A. El-Sohby, A. M. Elleboudy

International Conference on Case Histories in Geotechnical Engineering

This paper discusses the causes of damage of a broadcasting transmission station suffered from settlement cracks. The station buildings were low-rise reinforced concrete structures with isolated footings founded on alluvial deposit. Investigations revealed that the main causes of the observed nonuniform settlement were the existence of silt pockets below some footings, and the shrinkage of clayey soils due to dryness of the subsoil after ceasing the cultivation of land and using it as construction site. Rehabilitation scheme included structural repair of the cracked columns, beams and walls, and injection grouting of the foundation soil beneath the settled columns.

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Failure Of A Shipping Berth, Dinesh Mohan Jun 1993

Failure Of A Shipping Berth, Dinesh Mohan

International Conference on Case Histories in Geotechnical Engineering

A Major port in India had six cargo berths and a seventh one was to be added to cater for the heavy cargo traffic. The top layer of the soil along the berth was 20 m thick soft and sensitive marine silty clay with an average shear strength of 2 tons/Sqm. The design provided for a berth 342 m long. It had a quay and transit area supported on 750 mm diameter bored piles which was followed by open stacking ground 60 m wide, to be preconsolidated by sand drains. Finally it had a paved unconsolidated area 120 m wide. …

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Friction Pile Foundations Subject To Regional Subsidence, A. Rico, J. M. Orozco, J. L. León Jun 1993

Friction Pile Foundations Subject To Regional Subsidence, A. Rico, J. M. Orozco, J. L. León

International Conference on Case Histories in Geotechnical Engineering

A load mechanism and its associated displacements for friction piles driven in a soil subject to regional subsidence is presented. The effect of a surficial crust, which is not under consolidation, is analyzed and to avoid pile emersion, a boundary for the piles safety factor is established. Foundations supported on friction piles, where the foundation slab should always be in contact with the supporting soil, is also analyzed. It is proposed to consider that the load transmitted by the foundation slab be equal to the excavated weight and it is suggested that the increase pile-soil adherence with time, should be …

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Successful Design Of Expansive-Soil Foundation For A Large Modern Chemical Fertilizer Plant, H. B. Qian Jun 1993

Successful Design Of Expansive-Soil Foundation For A Large Modern Chemical Fertilizer Plant, H. B. Qian

International Conference on Case Histories in Geotechnical Engineering

Various methods of foundation treatment had been adopted in the design of different parts of the plant according to its particular needs respectively. The adopted methods include: selecting rational depth of foundation; increasing pressure on the base of foundation; replacement of soils; sand mat; pier foundation and large diameter cast-in-place piles. In addition to the foundation treatments, measures were also taken to prevent the infiltration of water and to protect the moisture of sub-soils. The super-structure were also designed to have a greater rigidity.

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Deformation Prediction For An Underground Opening, Yang Zhifa, Du Yonglian, Wang Sijing, Ji Liang Jie Jun 1993

Deformation Prediction For An Underground Opening, Yang Zhifa, Du Yonglian, Wang Sijing, Ji Liang Jie

International Conference on Case Histories in Geotechnical Engineering

For excavation of a large underground opening, how to predict the deformation caused by excavation is a subject of interest to the engineers. In this paper, the main underground opening of Lubuge Hydroelectric Power Station will be cited to explain the method predicting its deformation. The successful application shows that the method called MDBD could, perhaps, be used for deformation prediction of other large underground excavations if they satisfy some special conditions basically.

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Performance Of Prefabricated Vertical Drains In Improvement Of Malaysian Soft Marine Clay, F. Haji Ali, B. Kim Huat Jun 1993

Performance Of Prefabricated Vertical Drains In Improvement Of Malaysian Soft Marine Clay, F. Haji Ali, B. Kim Huat

International Conference on Case Histories in Geotechnical Engineering

In Malaysia, an increasing need has developed for various types of construction on sites underlain by soft cohesive soil. The use of vertical drains in conjunction with preloading is one of widely used methods to improve the geotechnical properties of the soft soil. This is due to its relatively cheap cost and availability of drains as well as the practical ease of application. This paper presents a number of high quality case studies which had been carried out to study the effectiveness of the vertical drains. The results of the studies are presented and discussed. The performance as well as …

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Geotechnical Problems In The Construction Of Underground Structures, E. Padilla Jun 1993

Geotechnical Problems In The Construction Of Underground Structures, E. Padilla

International Conference on Case Histories in Geotechnical Engineering

The paper describes, one of the typical cases in the construction of subterrain works in the city of Guadalajara , Jalisco; México; placed in a big landfill of pyroclastic materials, that are good aquifers that is why in the subsoil exists important hydrological resources and is the reason that when digging underground structures that exceed the groundwater level there were a lot of problems. The case presented is of one of the stretches of the tunnel for the urban electric train, that since its construction had failures; these are analyzed, the solutions implemented are described , and the behavior of …

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Author Index Volume I And Ii, Multiple Authors Jun 1993

Author Index Volume I And Ii, Multiple Authors

International Conference on Case Histories in Geotechnical Engineering

No abstract provided.

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Meeting Minutes Of The Organizing And Steering Committees, Multiple Members Jun 1993

Meeting Minutes Of The Organizing And Steering Committees, Multiple Members

International Conference on Case Histories in Geotechnical Engineering

No abstract provided.

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Table Of Contents - Vol. I, Multiple Authors Jun 1993

Table Of Contents - Vol. I, Multiple Authors

International Conference on Case Histories in Geotechnical Engineering

No abstract provided.

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Past Proceedings: First International Conference On Case Histories In Geotechnical Engineering (1984): Vol. Iii, Multiple Authors Jun 1993

Past Proceedings: First International Conference On Case Histories In Geotechnical Engineering (1984): Vol. Iii, Multiple Authors

International Conference on Case Histories in Geotechnical Engineering

No abstract provided.

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Past Proceedings: First International Conference On Case Histories In Geotechnical Engineering (1984): Vol. Ii, Multiple Authors Jun 1993

Past Proceedings: First International Conference On Case Histories In Geotechnical Engineering (1984): Vol. Ii, Multiple Authors

International Conference on Case Histories in Geotechnical Engineering

No abstract provided.

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Conference Schedule, Multiple Participants Jun 1993

Conference Schedule, Multiple Participants

International Conference on Case Histories in Geotechnical Engineering

No abstract provided.

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Analysis Of Small Pipe Piles Using The Field Vane, G. A. Miller, A. J. Lutenegger Jun 1993

Analysis Of Small Pipe Piles Using The Field Vane, G. A. Miller, A. J. Lutenegger

International Conference on Case Histories in Geotechnical Engineering

Results of axial compressive load tests on three small diameter pipe piles driven in a varved clay deposit are presented. Predictions of the axial pile capacity were made using the a-method originally proposed by Tomlinson (1957, 1971) and incorporating undrained strength profiles determined with the field vane. Predicted and measured capacities are compared and discussed in light of the various factors which can affect the outcome such as vane geometry, vane testing procedure and interpretation, pile load testing conditions, and empirical relationships incorporated in predictions.

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Bearing Capacity And Load-Displacement Behavior Of Rigid Pads On Soft, Sensitive, Clay, R. J. Jardine, B. M. Lehane, P. R. Smith, P. A. Gildea Jun 1993

Bearing Capacity And Load-Displacement Behavior Of Rigid Pads On Soft, Sensitive, Clay, R. J. Jardine, B. M. Lehane, P. R. Smith, P. A. Gildea

International Conference on Case Histories in Geotechnical Engineering

The paper describes tests on rigid square pads at the UK national soft clay research site at Bothkennar, Scotland. The work was performed as a low cost adjunct to the instrumented pile research described by Lehane and Jardine (1992). Its aims were to investigate (i} bearing capacity, (ii) load-displacement response to short and long term loading, (iii) the applicability of relevant theories and (iv) relationships between soil properties determined in-situ and those measured in high quality laboratory tests.

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Case Histories: Geology, Value Engineering And Deep Foundations In New York Area, S. K. Jain Jun 1993

Case Histories: Geology, Value Engineering And Deep Foundations In New York Area, S. K. Jain

International Conference on Case Histories in Geotechnical Engineering

The geologic and subsurface conditions in the Metropolitan New York area are highly variable and complex. The Building Code of the City of New York (henceforth, The Code) requires soil identification based on their geological history and engineering characteristics. The code is very stringent and it specifies elaborate subsurface exploration, field testing and geotechnical analysis for the foundation design and its installation. In this paper three deep foundation construction case histories in the New York City are presented which emphasize the importance of site geology, subsurface exploration and value engineering.

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Case History Of Soil Improvement For A Large-Scale Land Reclamation, Bang W. Shin, Eun C. Shin, Sun W. Kim, Byung C. Yeo, Paghunath Dass Jun 1993

Case History Of Soil Improvement For A Large-Scale Land Reclamation, Bang W. Shin, Eun C. Shin, Sun W. Kim, Byung C. Yeo, Paghunath Dass

International Conference on Case Histories in Geotechnical Engineering

In recent years, land reclamation works have been extensively implemented along the coastal lines for a variety of purposes. This paper relates to the case history of a land reclamation project for a steel mill complex construction in Korea. Site improvement techniques used in this project include construction of sand drains and pre loading. Construction procedures of sand drains are described as well as staged loading process along with field observations. Field measurement of settlement and theoretically estimated values are compared. The results of standard penetration tests and unconfined compression tests at various depths of soil, and time intervals are …

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Crack Damage And Treatment Of Low House On Expansive-Contractive Red Clay, Ke Zunjing, Shan Mei Jun 1993

Crack Damage And Treatment Of Low House On Expansive-Contractive Red Clay, Ke Zunjing, Shan Mei

International Conference on Case Histories in Geotechnical Engineering

Red clay distributes widely in China, it can be classified into two kinds: swell- shrinking and non-swell-shrinking red clay. According to the strong strength and low compressibility features of the Expansive-contractive Red Clay (ECRC), it can be used as an excellent natural ground. Sometimes its swell- shrinkage property may cause crack damage to the low house which based on the ECRC. This rupture is quite common and serious, the crack house became dangerous and had to be rebuilt. In China, the main preventive measures against the crack damage are: moisture holding, deep embedment, soil replacement method (sand cushion), sand surrounding …

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Discussions And Replies Session 1, T. P. Smith, Y. Iwasaki, D. Sielbach, C. Mirza Jun 1993

Discussions And Replies Session 1, T. P. Smith, Y. Iwasaki, D. Sielbach, C. Mirza

International Conference on Case Histories in Geotechnical Engineering

No abstract provided.

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Dynamic And Static Analysis And In Situ Investigation Of Vibro-Fundex Piles, A. Tejchman, K. Gwizdala Jun 1993

Dynamic And Static Analysis And In Situ Investigation Of Vibro-Fundex Piles, A. Tejchman, K. Gwizdala

International Conference on Case Histories in Geotechnical Engineering

Based on dynamic and static formulas and loading tests analysis of bearing capacity of type Vibro-Fundex driven piles is presented. The piles were embedded into noncohesive soils of various origin and degree of compaction. Using this analysis and performed investigations, the lengths of piles designed on the basis of static formulae have been corrected for safety transferring of loads into subsoil.

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Eccentric Loading Of Helical PiersTm For Underpinning, Gary Seider Jun 1993

Eccentric Loading Of Helical PiersTm For Underpinning, Gary Seider

International Conference on Case Histories in Geotechnical Engineering

Over the last six years, Helical Piers have been utilized as compression members in the remedial repair of residential and light commercial structures. Current installation techniques create a small offset between the pier shaft and the grade beam or footing being underpinned. The purpose of this study was to examine the effects of the eccentric load that is applied to the top of the shaft on the Helical Pier. Three different sizes of piers were installed at a building site where the soil is predominantly clay. Compressive loads were applied, and data was recorded from which bending moments versus depth, …

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Engineering Illustrations Of Correcting Building Inclination By Stress Redistribution Method, Shi-Tao Hou, Xiao-Xue Ding, Zai-Cheng Bai Jun 1993

Engineering Illustrations Of Correcting Building Inclination By Stress Redistribution Method, Shi-Tao Hou, Xiao-Xue Ding, Zai-Cheng Bai

International Conference on Case Histories in Geotechnical Engineering

By drilling large diameter holes in foundation soil and digging out soils to release (or redistribute) lateral stress in subsoil so as to create new settlement, a new method, which is called stress redistribution method, has been developed for correcting inclined building on soft foundation soil. Using this method, tens buildings with inclination up to 1-2% have been corrected and resumed their normal function in Wuhan, China. Some typical case histories are selected to illustrate the sensitive, controllable, and reliable characteristics of this method. The technical problems encountered in correcting process, such as the induced settlement, its influence on neighbour …

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Failure Of Offshore Concrete Piles During Construction, V.D. S. Raju, R. Sundaravadivelu, V. G. Idichandy Jun 1993

Failure Of Offshore Concrete Piles During Construction, V.D. S. Raju, R. Sundaravadivelu, V. G. Idichandy

International Conference on Case Histories in Geotechnical Engineering

Two offshore piles of 1000 mm diameter with 1 m socketing into rock in 15 m water depth have failed during construction. The analysis of failure considering wave and current forces, structural and foundation capacities and vibration measurement on freshly concreted and well set piles is discussed.

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Foundation Strengthening And Protective Measures For Sri Sangameshwar Temple At Kudal Sangam, Karnataka, Devendra Sharma Jun 1993

Foundation Strengthening And Protective Measures For Sri Sangameshwar Temple At Kudal Sangam, Karnataka, Devendra Sharma

International Conference on Case Histories in Geotechnical Engineering

Sri Sangameshwara temple situated at the confluence of two rivers developed noticeable tilt. Also the temple site be inundated by the back waters of the dam during floods. An elaborate plan of dismantling the temple and reconstructing it by the same stone pieces and statuary could be carried through partially only and the sanctum santorum portion housing the ‘Lingam’ had to be retained. Now the entire temple is to be reconstructed as and where it was. The temple was founded on a boulder platform with hetrogeneous river deposits below it. Honouring the constraints of uninterrupted daily worship rituals in the …

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Foundations Failures Of Bridges And Geotechnical Investigations, J. K. Jain, Rajesh Bhargava, A. K. Saxena Jun 1993

Foundations Failures Of Bridges And Geotechnical Investigations, J. K. Jain, Rajesh Bhargava, A. K. Saxena

International Conference on Case Histories in Geotechnical Engineering

In the present paper two cases of foundation failures due to which the complete bridge structure have failed are reported. The 93m long Palakmati high level brick masonry arch bridge on Hoshangabad - Piparia Road was constructed in year 1910. This bridge has shallow well brick masonry foundation with brick masonry wall type piers. Foundations of piers were on two circular shallow independent wells. The wells are resting on yellow soil. During floods of 1989, the pier No.3 sunk. This brought down 5 spans. Two well foundations were up-rooted. Cracks were developed in other arches also. The 90.5m long submersible …

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Instrumented Load Test On A Bent Pile, P. Dunlop, R. E. Sandiford, D. R. Erali Jun 1993

Instrumented Load Test On A Bent Pile, P. Dunlop, R. E. Sandiford, D. R. Erali

International Conference on Case Histories in Geotechnical Engineering

The load carrying capacity of a bent shell pile in soft silts and clays was determined from an instrumented test. Lateral pile displacements along the pile were measured during loading and unloading using an inclinometer traveling in a plastic casing. Pile capacity was estimated by Johnson's (1962) method prior to the load test and by the STRUDL structural engineering program after performing the load test. Both methods adequately predicted the pile performance. STRUDL, however, accommodated more realistic soil parameter variation and boundary conditions necessary for an integral soil-pile-structure interaction analysis.

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Monitoring Of Load And Distribution In Long Caissons Under 49 Story Structure, W. A. Trow, T. G. Orpwood, R. L. Carrington Jun 1993

Monitoring Of Load And Distribution In Long Caissons Under 49 Story Structure, W. A. Trow, T. G. Orpwood, R. L. Carrington

International Conference on Case Histories in Geotechnical Engineering

This paper presents the results of settlement and load distribution monitoring carried out during the construction of a 49 storey condominium supported on long end-bearing caissons socketed into shale bedrock. Four caissons were instrumented to determine load distribution within the rock socket. One of these caissons also was instrumented to measure actual load reaching the top and bedrock level of the shaft. As of early March 1992, with the building already topped-off for over 6 months and about 100% of anticipated dead load applied, the settlement appears to consist entirely of elastic compression of the caisson shafts. Although the estimated …

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