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Past Proceedings: First International Conference On Case Histories In Geotechnical Engineering, St. Louis (1984), Multiple Authors
Past Proceedings: First International Conference On Case Histories In Geotechnical Engineering, St. Louis (1984), Multiple Authors
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
No abstract provided.
First International Conference On Case Histories In Geotechnical Engineering, Multiple Authors
First International Conference On Case Histories In Geotechnical Engineering, Multiple Authors
International Conference on Case Histories in Geotechnical Engineering
No abstract provided.
Performance Of Diaphragm Walls In Deep Foundation Excavations, Z. C. Moh, T. F. Song
Performance Of Diaphragm Walls In Deep Foundation Excavations, Z. C. Moh, T. F. Song
International Conference on Case Histories in Geotechnical Engineering
Two case studies of using diaphragm wall as earth retaining structure for deep excavation are reported. Case A concerns excavation down to a depth of 14.7 min alternate layers of soft silty clay and silty sand. Diaphragm walls of 70 m thick and 22 m deep were installed into a dense silty sand stratum. In Case B, diaphragm walls of 60 m thick were constructed in very soft clayey soil without penetration into any firm stratum. In both cases, instrumentations including piezometers, inclinometers, earth pressure cells, reinforcing bar transducers, heave stakes, settlement points and strut strain gauges were installed and …
Preloading For Large Storage Building, A. C. Stamatopoulos, P. C. Kotzias
Preloading For Large Storage Building, A. C. Stamatopoulos, P. C. Kotzias
International Conference on Case Histories in Geotechnical Engineering
The properties and method of preloading a 11 m erratic deposit of soft clays and loose sands, are described. Under the preload embankment of 12 m the deposit compressed an average of 7%. Settlement developed rapidly and excess porepressure dissipated within few days, never exceeding 2.1 m of water head. After preload removal borings were performed to compare results with those obtained on the untreated site. This comparison showed that the compressibility and strength of both the clayey and sandy components improved substantially and that the subsurface became more homogeneous. The projected structure built on the improved ground has performed …
Performance Of Sand Drains In A Tidal Marsh, R. P. Long, W. H. Hover
Performance Of Sand Drains In A Tidal Marsh, R. P. Long, W. H. Hover
International Conference on Case Histories in Geotechnical Engineering
This paper presents the field behavior of a jetted sand drain installation at a preloaded wastewater treatment facility site in Gloucester, Massachusetts, U.S.A. The site is underlain by surficial estuary deposits above a stratum of stiff to soft clays. Detailed subsurface explorations and laboratory testing program provided data to predict amounts and rates of primary compression and rates of secondary compression in the referenced strata. The field behavior is compared to predictions through analyzed values of total settlement at the end of primary compression, coefficient of consolidation, and coefficient of secondary compression. A field instrumentation program allowed monitoring of settlements …
Pretreatment Of A Soft Soil By Surcharging - A Case History, D. Lakner, I. K. Lee, E. Armstrong, O. G. Ingles
Pretreatment Of A Soft Soil By Surcharging - A Case History, D. Lakner, I. K. Lee, E. Armstrong, O. G. Ingles
International Conference on Case Histories in Geotechnical Engineering
A normally consolidated silty clay deposit, varying in depth from 0 to 15 m, was pretreated by surcharging combined with P.V.C. vertical drains. Representative field values of the vertical coefficients of primary (0.0015 m2/kN) and secondary consolidation (0.01) were calculated from the settlements caused by a preliminary fill placed some six years prior to the detailed geotechnical studies. A conservative representative field value of the horizontal coefficient of primary consolidation was established to be 8 m2/year. Asaoka's method was used to predict future settlements due to both primary and secondary consolidation. The vertical drains were installed …
Performance Of Preload On Cohesionless Soils, A. F. Youssef, O. Erol
Performance Of Preload On Cohesionless Soils, A. F. Youssef, O. Erol
International Conference on Case Histories in Geotechnical Engineering
Common occurrence of loose normally consolidated fine sands and silts extending to considerable depths necessitates the utilization of ground improvement techniques along the coasts of Arabian Peninsula. In the case considered, the soil profile consisted of twenty meter thick compressible sands, and preloading technique was suggested to stabilize the foundation soil. The paper presents the performance of the preloading and the level of soil improvement achieved. The observed settlements and settlement-time behaviour are compared with the values estimated from various methods. The soil parameters back calculated from measured field behaviour are reported.
Settlements Induced By Soft Ground Tunneling, Miguel P. Romo
Settlements Induced By Soft Ground Tunneling, Miguel P. Romo
International Conference on Case Histories in Geotechnical Engineering
Ground settlements induced by air-pressure shield tunneling throughout the soft clays of Mexico City have been monitored in five test sections by means of settlement points installed at various depths and distances from the tunnel axis. Subsoil conditions and soil characteristics at each site were thoroughly studied in the field and in the laboratory. Measured settlement profiles have been compared to those computed by a simplified analytical procedure showing very good agreement.
Slurry Trench Wall Replaces Structure Underpinning, E. J. Zeigler, J. L. Wirth, J. T. Miller
Slurry Trench Wall Replaces Structure Underpinning, E. J. Zeigler, J. L. Wirth, J. T. Miller
International Conference on Case Histories in Geotechnical Engineering
Construction of the Charles Center Station of the Baltimore Metro required a cut-and-cover excavation 66 feet (20 m) deep in a major street in the central business district of Baltimore, Maryland. Several high-rise buildings were so close to the excavation that it was necessary to remove portions of the spread footing foundations which extended into the proposed station excavation. The contract documents required that the spread footings adjacent to the excavation be underpinned using steel pipe piles jacked to end bearing on bedrock. When it was apparent that difficulties in installation would result in substantial delays in project completion, the …
Soft Ground Tunnel Failures In Michigan, Jerome C. Neyer
Soft Ground Tunnel Failures In Michigan, Jerome C. Neyer
International Conference on Case Histories in Geotechnical Engineering
Three failures of non-reinforced concrete tunnels in Michigan have been investigated. Descriptions of the failures have been presented, together with geotechnical data for the sites. A probable failure mechanism has been described, as well as design concepts which need to be considered on future projects. Finally, construction procedures to be specified as part of the design process have been evaluated.
Soil-Cement Backfill For Nuclear Power Plant Foundations, E. Saveri, G. P. Vaccaro, G. Varosio
Soil-Cement Backfill For Nuclear Power Plant Foundations, E. Saveri, G. P. Vaccaro, G. Varosio
International Conference on Case Histories in Geotechnical Engineering
Soil-cement backfills have been analyzed, designed and tested for the Alto Lazio Nuclear Power Plant in Italy. Extensive analyses were performed to evaluate the stability of and stresses in soil-cement foundation backfills. Soil-structure interaction was also analyzed. The minimum required cement content for foundation and general backfills was established and verified by means of laboratory and field tests. Foundation backfills were designed for two major buildings of the plant.
Stabilization Of The Outenberg Hill In Geraardsbergen, R. De Paepe, M. Wallays
Stabilization Of The Outenberg Hill In Geraardsbergen, R. De Paepe, M. Wallays
International Conference on Case Histories in Geotechnical Engineering
A road, winding across the "Oudenberg" hill at Geraardsbergen, Belgium, and built partly in embankment and in excavation, suffered from three landslides from 1937 to 1966. Bored piles were used to nail the surface layers to the stable substratum, subsurface drainage to limit the fluctuations of the water table and a 220 m long low viaduct founded directly on bored piles to re-establish the traffic. Since the end of the works no additional movement appeared.
Subsidence Affects Due To Gypsum Solution In Syracuse, New York, G. W. Lee, S. P. Clemence, S. K. Bhatia, S. Anagnost
Subsidence Affects Due To Gypsum Solution In Syracuse, New York, G. W. Lee, S. P. Clemence, S. K. Bhatia, S. Anagnost
International Conference on Case Histories in Geotechnical Engineering
Two apartment buildings owned by Syracuse University in the Slocum Heights area underwent extensive differential settlement manifested by foundation cracks. Examination of rock exposures in the nearby area revealed the presence of gypsum beds. Onsite boring and investigation revealed that regrading and installation of french drains and storm sewers influenced the groundwater regime resulting in solutioning of the gypsum and subsequent collapse of underground cavities. Remedial measures included alteration of drainage system and underpinning of apartment structures.
The Behavior Of House On Seasonally Frozen Ground, Xu You Zai, Wang Zheng Qiu
The Behavior Of House On Seasonally Frozen Ground, Xu You Zai, Wang Zheng Qiu
International Conference on Case Histories in Geotechnical Engineering
This paper presents a case history of instrumented house with shallow foundation on the seasonally frozen ground. Variations of the soil frost penetration, the soil temperature, the cracks of the house, the displacements and the contact pressure on the base were systematically observed during freezing and thawing periods. It has been confirmed that the main reason why the cracks of the houses with shallow foundations occurred is that the development of the frozen depth is not uniform and the frost heaving and the redistribution of the contact pressures are unequal. This paper puts forward the principle of the effective depth …
The Brenda Mines' Cycloned- Sand Tailings Dam, Earle J. Klohn
The Brenda Mines' Cycloned- Sand Tailings Dam, Earle J. Klohn
International Conference on Case Histories in Geotechnical Engineering
For the benefit of those readers not fully conversant with mine tailings and the methods commonly used to store them, the paper presents a brief overview covering the composition of tailings and the procedures commonly used to design and construct the required tailings dams. The remainder of the paper presents a detailed description of the design, construction, and performance of the Brenda Cycloned-Sand Tailings Dam. This includes a summary and assessment of the large volume of data available from extensive field, laboratory, and office studies that have been ongoing since the start of construction in 1968. The most recent of …
The Creation Of Additional Space For The Storage Of Dredged Materials - A Case History, Nicholas Chryssafopoulos
The Creation Of Additional Space For The Storage Of Dredged Materials - A Case History, Nicholas Chryssafopoulos
International Conference on Case Histories in Geotechnical Engineering
Material dredged from the Delaware River is being stored on land in areas surrounded by man-made dikes. In the past, the height of these dikes had been increased in order to provide the needed additional storage space. However, existing land configuration and the high water table in the storage areas, together with the high water content and low strength of the stored dredged materials prohibit further increases of the dike height. A system of interconnected drainage trenches, excavated inside these areas and discharging into the river, was used to lower both the water table and the water content of the …
Time Dependent Limit Stability Of Tunnel And Dam Engineering In Difficult Rocks, Tan Tjong Kie
Time Dependent Limit Stability Of Tunnel And Dam Engineering In Difficult Rocks, Tan Tjong Kie
International Conference on Case Histories in Geotechnical Engineering
Some representative case histories of the damage of tunnels and galleries in weak fissured swelling rock formations with low competency ratios are described; a rheological analysis and suggestions for the design are presented. The basic ideas underlying the design and construction of the Ghe Zou Ba dam, founded on horizontal layers of sand-and mudstones interbedded by thin clay sheets are reported. In all such cases the time factor is important.
Twenty-Year Performance Of Soil-Cement Dam Facings, T. J. Casias, A. K. Howard
Twenty-Year Performance Of Soil-Cement Dam Facings, T. J. Casias, A. K. Howard
International Conference on Case Histories in Geotechnical Engineering
The soil-cement slope protection on three Bureau of Reclamation projects has been damaged enough to require repair. They were the first three Bureau embankments to utilize soil-cement in place of riprap and have been in service about 18 to 20 years. The soil-cement facings on other Bureau dams are in excellent condition. The lack of bond between the soil-cement lifts in combination with severe weather and wave action appear to be the main factors contributing to the damage. Laboratory tests and field test sections indicate that cement applied between the soil-cement lifts may be a practical solution to prevent damage …
Unplanned Construction Of A 210 Ft High Temple, Gopal Ranjan, Shamsher Prakash
Unplanned Construction Of A 210 Ft High Temple, Gopal Ranjan, Shamsher Prakash
International Conference on Case Histories in Geotechnical Engineering
A 210′ high temple site was located on a hillock made up of filled up soil. Taking the advantage of site topography terraced construction consisting of the main temple in the centre and rooms on the three sides were planned. The construction progressed without any soil investigations. The paper highlights the problems faced at the stage when the construction had already progressed up to +50 ft. Soil investigations were carried out at this stage. Then, the performance of structures was predicted and possible modifications in the future construction are presented.
Upgrading Existing Footings With Micro-Piles, Surinder Singh, E. Itzig Heine
Upgrading Existing Footings With Micro-Piles, Surinder Singh, E. Itzig Heine
International Conference on Case Histories in Geotechnical Engineering
The use of pressure-injected micro-piles to upgrade the load carrying capacity of existing spread footings and to limit settlement is described. Theoretical pile load capacity and predicted settlement have been verified by a full-scale pile load test.
Uranium Mill Trailings Geotechnical Investigations - A Case History, V. Singh, J.P. Berry, D.F. Kapral
Uranium Mill Trailings Geotechnical Investigations - A Case History, V. Singh, J.P. Berry, D.F. Kapral
International Conference on Case Histories in Geotechnical Engineering
Uranium mill tailings at Union Carbide Corporation's mining and mill complex at Uravan, Colorado, are deposited in two tailings piles along a steep hillside. The tailings are deposited in slurry form, allowed to decant, and the decant liquid removed for recycling in the milling operation. The impoundment dikes are raised using the coarser portion of the tailings in an upstream method of construction. At the time of the study, the height of the tailings piles was in excess of 100 feet. Continued use of these piles necessitated a detailed geotechnical stability evaluation and design of stabilizing measures in order to …
Use Of Surcharges As Treatment Of Residual Soil Foundation - A Case History, L. G. F. S. Demello, M. Cepollina, F. J. P. Deoliveira
Use Of Surcharges As Treatment Of Residual Soil Foundation - A Case History, L. G. F. S. Demello, M. Cepollina, F. J. P. Deoliveira
International Conference on Case Histories in Geotechnical Engineering
Predetermined locations for storage of leaching materials needed total warranty against cracking as result of differential settlements. Two stockpiles had to be located on a platform, one placed in area of low height cuts of unsaturated residual soils, the other over fills placed without compaction criteria over saturated clayey soils of low consistency. It was decided to preload the platform in order to minimize future absolute and differential settlements, reducing them to allowable limits. The systematic interpretation of the instrumentation allowed the optimization of the treatment. The behaviour during unloading of the soils indicated heaves much smaller than the limits …
Conference Committees, Multiple Members
Conference Committees, Multiple Members
International Conference on Case Histories in Geotechnical Engineering
No abstract provided.
Conference Participants, Multiple Participants
Conference Participants, Multiple Participants
International Conference on Case Histories in Geotechnical Engineering
No abstract provided.
Concluding Session, Multiple Authors
Concluding Session, Multiple Authors
International Conference on Case Histories in Geotechnical Engineering
No abstract provided.
Conference Schedule, Multiple Authors
Conference Schedule, Multiple Authors
International Conference on Case Histories in Geotechnical Engineering
No abstract provided.
Preface And Contents - Vol. 1, Multiple Authors
Preface And Contents - Vol. 1, Multiple Authors
International Conference on Case Histories in Geotechnical Engineering
No abstract provided.
Preface And Contents - Vol. 4, Multiple Authors
Preface And Contents - Vol. 4, Multiple Authors
International Conference on Case Histories in Geotechnical Engineering
No abstract provided.
Preface And Contents - Vol. 3, Multiple Authors
Preface And Contents - Vol. 3, Multiple Authors
International Conference on Case Histories in Geotechnical Engineering
No abstract provided.
Preface And Contents - Vol. 2, Multiple Authors
Preface And Contents - Vol. 2, Multiple Authors
International Conference on Case Histories in Geotechnical Engineering
No abstract provided.