The Experts below are selected from a list of 192 Experts worldwide ranked by ideXlab platform
Osamu Kusakabe - One of the best experts on this subject based on the ideXlab platform.
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applicability of cpt for construction control of seawall on soft clay improved by Sand Drain method
Soils and Foundations, 2004Co-Authors: Takeshi Fukasawa, Junichi Mizukami, Osamu KusakabeAbstract:ABSTRACT A case study is presented of an application of the cone penetration test for construction control of a seawall construction on soft ground improved by Sand Drain. Effective construction control of such a soil structure requires a systematic way to collect accurate information about the progress of consolidation and gain in soil strength. An empirical correlation is proposed concerning cone resistance measured by a cone penetration test and the unDrained shear strength of the ground. The relationship between cone resistance and the unDrained shear strength is not affected by the state of consolidation of the ground. Based on the empirical correlation found in this study, gain in unDrained shear strength during construction can be accurately evaluated by the cone penetration test. This paper also demonstrates the usefulness of cone penetration test to monitor the degree of consolidation of the improved ground. Also estimated by the cone penetration test are aging effect, classification of clay layer and strength increment ratio in normally consolidated state. Aspects geotechnical behavior of the ground are discussed such as the process of strength increment, aging effect, sequence of various shear tests to examine change in strength and considerations on shear strength of improved ground after deformation. The results of this study clearly show that the cone penetration test is a very useful investigation method and has high applicability for construction control.
Ken Skaftfeld - One of the best experts on this subject based on the ideXlab platform.
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Numerical modeling of Sand Drain performance — a case study of the Salter Street Bridge construction
Canadian Geotechnical Journal, 2008Co-Authors: Michael J. Van Heldenm.j. Van Helden, James Blatz, Nelson J. Ferreiran.j. Ferreira, Ken SkaftfeldAbstract:Several bridge crossings proposed for the Red River Floodway expansion project were recently constructed using vertical Sand Drains to accelerate excess pore-water pressure dissipation and settlement caused by embankment fill loading. With limited local data regarding the performance of Sand Drains, the calibrated model presented here addresses the need to optimize the design of Sand Drain configurations, maximize cost savings, and minimize construction delays for future structures. This study presents a coupled finite element embankment consolidation model calibrated against measured pore-water pressure and settlement data from the Salter Street Bridge embankment fill construction, which used vertical Sand Drains to dissipate excess pore-water pressures. A hydraulic conductivity modification procedure was used to simulate the axisymmetric flow conditions with a plane-strain model neglecting well resistance but incorporating the effects of a smear zone. A sensitivity analysis was performed using the calib...
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numerical modeling of Sand Drain performance a case study of the salter street bridge construction
Canadian Geotechnical Journal, 2008Co-Authors: Michael J. Van Heldenm.j. Van Helden, James Blatz, Nelson Ferreiran J J Ferreira, Ken SkaftfeldAbstract:Several bridge crossings proposed for the Red River Floodway expansion project were recently constructed using vertical Sand Drains to accelerate excess pore-water pressure dissipation and settleme...
A. M. Khan - One of the best experts on this subject based on the ideXlab platform.
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Shear strength characteristics of Madinah clay with Sand compaction piles
Geotechnical Testing Journal, 1998Co-Authors: M. Z. A. Gutub, A. M. KhanAbstract:Shear strength characteristics of soft Madinah clay have been investigated from a series of consolidated unDrained (CU) direct shear tests on specimens without and with circular Sand Drains of variable diameters. The investigation is conducted to study the shear strength behavior of soft Madinah clay in the presence of Sand Drains provided for the purpose of accelerating Drainage and enhancing its response towards stabilization by preloading. The experimental shear strength test results have been compared with the theoretical values based on shear strength of clay-Sand composite material derived from the shear properties of the individual materials. The shear strength parameters obtained from this study are expected to be of benefit and practical use for carrying out stability analysis of structures like embankments and foundations supported by clay and stabilized with vertical Sand Drains. Useful data were obtained showing a positive influence of the Sand Drain system on the enhancement of shear strength characteristics of soft Madinah clay.
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SHEAR STRENGTH CHARACTERISTICS OF MADINAH CLAY WITH Sand COMPACTION PILES. TECHNICAL NOTE
Geotechnical Testing Journal, 1998Co-Authors: M. Z. A. Gutub, A. M. KhanAbstract:The predominant soil type in the city of Madinah Almunawara, Saudi Arabia, is clay. The existence of clay in many places is a problem for construction engineers. The shear strength characteristics of soft Madinah clay have been studied in a series of consolidated unDrained (CU) direct shear tests on specimens with and without circular Sand Drains of variable diameters. The present investigation is conducted to study the shear strength behavior of soft Madinah clay in the presence of Sand Drains provided for the purpose of accelerating Drainage and enhancing its response towards stabilization by preloading. The experimental shear strength test results have been compared with the theoretical values based on shear strength of clay-Sand composite material derived from the shear properties of the individual materials. The shear strength parameters obtained from this study are expected to be of benefit and practical use for carrying out stability analysis of structures like embankments and foundations supported by clay and stabilized with vertical Sand Drains. Useful data were obtained showing a positive influence of the Sand Drain system on the enhancement of shear strength characteristics of soft Madinah clay.
Ying Long - One of the best experts on this subject based on the ideXlab platform.
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Notice of Retraction: The simulation analysis for sacked Sand Drain of soft soil foundation
2010 2nd International Conference on Computer Engineering and Technology, 2010Co-Authors: Deguang Meng, Ying LongAbstract:This article has been retracted by the publisher.
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notice of retraction the simulation analysis for sacked Sand Drain of soft soil foundation
International Conference on Computer Engineering and Technology, 2010Co-Authors: Deguang Meng, Ying LongAbstract:It is extensive use to sacked Sand Drain in the engineering of soft soil foundation. Three-dimensional finite element model is established on the based of Biot consolidation theory, the model is loaded and calculated on the based of considering lateral deformation and spatial seepage, elastic-plasticity character of soil, construction stage loading progress etc. case study is analyzed to obtain the regular of settlement and excess hydrostatic pore pressure. The calculation value of finite element method is reasonable to compare with measured data. The finite element method is used to simulate truly every position and step settlement and excess hydrostatic pore pressure. And reasonable project plan is obtained through the optimization analysis. The method can analyze reasonably on the sacked Sand Drain of soil soft foundation and forecast final settlement of embankment more exactly to supply reference of design and construction.
Takeshi Fukasawa - One of the best experts on this subject based on the ideXlab platform.
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applicability of cpt for construction control of seawall on soft clay improved by Sand Drain method
Soils and Foundations, 2004Co-Authors: Takeshi Fukasawa, Junichi Mizukami, Osamu KusakabeAbstract:ABSTRACT A case study is presented of an application of the cone penetration test for construction control of a seawall construction on soft ground improved by Sand Drain. Effective construction control of such a soil structure requires a systematic way to collect accurate information about the progress of consolidation and gain in soil strength. An empirical correlation is proposed concerning cone resistance measured by a cone penetration test and the unDrained shear strength of the ground. The relationship between cone resistance and the unDrained shear strength is not affected by the state of consolidation of the ground. Based on the empirical correlation found in this study, gain in unDrained shear strength during construction can be accurately evaluated by the cone penetration test. This paper also demonstrates the usefulness of cone penetration test to monitor the degree of consolidation of the improved ground. Also estimated by the cone penetration test are aging effect, classification of clay layer and strength increment ratio in normally consolidated state. Aspects geotechnical behavior of the ground are discussed such as the process of strength increment, aging effect, sequence of various shear tests to examine change in strength and considerations on shear strength of improved ground after deformation. The results of this study clearly show that the cone penetration test is a very useful investigation method and has high applicability for construction control.
