- Pressuremeter Testing Along Interstate 10 in Tucson, Arizona
- Naresh C. Samtani
- Book Title / Journal: International Journal of Geoengineering Case Histories
- Year: 2020 , Volume: 5
- Pressuremeter
- Keywords: Pressuremeter ; Cementation ; Induration ; Alluvial Soils ; Interstate 10 ; Drilled Shaft ; Side Resistance ; Base Resistance ; Collapse Potential
- Abstract
In arid to semi-arid regions alluvial soil deposits can range from collapse-susceptible, variably cemented to indurated. In these soils, reliable estimation of soil properties based on penetration resistance indicators such as N-values from Standard Penetration Tests (SPTs) is difficult. Varying content of gravels and cobbles provides additional complexity. In such conditions, sample recovery from SPTs is limited and refusal N-values occur. This paper presents a database of 74 pressuremeter tests along portions of Interstate 10 (I10) through Tucson, Arizona, where soil conditions noted above were encountered. The results are used to evaluate the subsurface stratigraphy. Estimated side and base resistance for drilled shafts are presented and compared with recommendations by the American Association of State Highway and Transportation Officials (AASHTO) and the Federal Highway Administration (FHWA). Comparisons of estimated side and base resistances from pressuremeter tests with those from a large-scale load test are presented. Evaluation of the collapse potential of soils using pressuremeter tests is also discussed and the results compared with collapse potential based on 1-D laboratory tests. PDF |
- Estimation of the Hydroconsolidation Susceptibility of the Anthropogenic Fill of the Historical Center of Thessaloniki, Greece
- Nikolaos P. T. Chatzigogos ; Thomas K. Makedon ; George E. Tsindaris ; Stefanos C. Tsotsos ; Basile C. Christaras
- Book Title / Journal: International Journal of Geoengineering Case Histories
- Year: 2017 , Volume: 4
- Soil Mechanics ; Settlements ; Laboratory Testing ; Site Characterization & In-situ Testing (General)
- Keywords: hydroconsolidation ; anthropogenic historical fill ; collapse settlement ; oedometer simulation ; Thessaloniki’s Metro
- Abstract
The collapse of the soil structure due to wetting is called hydroconsolidation and it occurs only once under constant loading, in cases of perturbation of the soils moisture content. It is encountered usually in non-sedimentary soils such as anthropogenic fills and residual materials. This paper presents an interpretation of hydroconsolidation settlements in a building of the historical centre of Thessaloniki followed after a rise of the water table. The interpretation is based on the results of laboratory evaluation of hydroconsolidation properties, in conjunction with in situ measurements of settlements. PDF |
- The May 25th 2011 Railroad Embankment Failure in Ann Arbor, Michigan, As a Means for Teaching Geotechnical Engineer
- Dimitrios Zekkos ; Adda Athanasopoulos-Zekkos ; Athena Grizi ; William Greenwood
- Book Title / Journal: International Journal of Geoengineering Case Histories
- Year: 2016 , Volume: 3
- Slope Stability Analysis ; Site Characterization & In-situ Testing (General) ; Seepage ; Railway Geotechnics
- Keywords: Education ; Embankment ; stability ; Seepage ; railroad ; site characterization
- Abstract
A 30-m long railroad embankment failure that occurred on May 25 2011 in the city of Ann Arbor, Michigan, is presented. Emphasis is given on the field observations of the failure, the characterization of the site conditions and the seepage and slope stability analyses, all of which represent important components of the training and practice of a geotechnical engineer. The failure occurred following a record wet season that resulted in ponding water against the embankment and high enough water pressures and exit gradients that resulted in instability of the railroad embankment. Detailed background material and the methodology for using the case history in geotechnical engineering education are presented. PDF |
- Relationship Between Coefficient of Consolidation and Over-Consolidation Ratio from Piezo-cone and Oedometer Testing
- B. Poon ; K. Chan
- ICGE Colombo 2015
- Year: 2015
- Site Characterization & In-situ Testing (General) ; Laboratory Testing
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- DEM modelling of the dynamic penetration process on Mars as a part of the NASA InSight Mission
- N.I. Komle ; G. Kargl ; H.F. Schweiger ; J. Poganski
- Year: 2015
- Site Characterization & In-situ Testing (General)
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- Testing of landslide triggering mechanism by pore pressure inflation with back pressure shear box
- K. Bondars ; P. Skels
- Year: 2015
- Site Characterization & In-situ Testing (General)
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- Qualitative Evaluation of Undisturbed GP Samples Extracted from Alluvial Sandy Soil Deposits Based on Dynamic Shear Modulus Measurements
- G. Chiaro ; T. Kiyota ; Y. Hosono ; Y. Umehara ; Y. Yagiura ; H. Chiba
- ICGE Colombo 2015
- Year: 2015
- Site Characterization & In-situ Testing (General) ; Soil Dynamics In-Situ ; Soil Dynamics Testing in the Laboratory
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- Relevant relations in order to better assess preconsolidation pressure values for the design of underground constructions in soft ground
- J. C. Gress
- IS SEOUL '14
- Year: 2014
- Underground Structures ; Site Characterization & In-situ Testing (General)
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- Field tests of long-range design conical foundations in Karaganda coal basin
- A. Zh. Zhussupbekov ; B. A. Bazarov ; A. N. Konakbaeva
- IS SEOUL '14
- Year: 2014
- Site Characterization & In-situ Testing (General)
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- Soil Liquefaction/Nonliquefaction in the Achaia-Ilia (Greece) 2008 Earthquake: Field Evidence, Site Characterization and Ground Motion Assessment
- Anastasios Batilas ; Panagiotis Pelekis ; Vasileios Vlachakis ; George Athanasopoulos
- Book Title / Journal: International Journal of Geoengineering Case Histories
- Year: 2014 , Volume: 2
- Geotechnical Earthquake Engineering ; Liquefaction Engineering ; Cone Penetration Testing (CPT) ; Geophysics ; Standard Penetration Testing (SPT)
- Keywords: soil liquefaction ; Field observations ; site characterization ; Achaia-Ilia Earthquake (2008) ; Peak ground acceleration
- Abstract
Macroseismic observations in the meizoseismal area of the Achaia-Ilia, Greece, Mw 6.4 earthquake of 8 June, 2008, have shown that soil liquefaction occurred at a number of sites up to distances of 25 km from the causative fault. In one of these sites (SITE-I at coastal zone of Kato Achaia) the occurrence of liquefaction was extensive and was followed by lateral spreading. In another nearby site (SITE-II) only marginal liquefaction (or nonliquefaction) was observed. Following the macroseismic observations, a geotechnical investigation was carried out at SITE-I and SITE-II which included exploratory boreholes with continuous sampling, SPT measurements, CPT soundings, surface wave measurements (SASW, MASW, ReMi) and laboratory testing. Based on the results of geotechnical investigation, the soil stratigraphy and pertinent soil properties were evaluated in the liquefaction/nonliquefaction locations. The assessment of peak ground acceleration at the area of SITE-I and SITE-II was based on attenuation relations and shaking table tests performed to simulate the observed behavior of an overturned (during the main shock), barrel-shaped, plastic, water filled container sitting on the ground surface at SITE-I. It is believed that the data presented in this paper can be used to 1) check the validity of current liquefaction susceptibility criteria/liquefaction triggering relationships, and 2) establish a well documented liquefaction case history that can be part of future liquefaction databases. PDF |
- The use of light weight deflectometer for in situ evaluation of sand degree of compaction
- A.F. Elhakim
- Book Title / Journal: Housing and Building National Research Center
- Year: 2014 , Volume: 10
- Site Characterization & In-situ Testing (General)
- Description
- The light weight deflectometer (LWD), also known as the light falling weight deflectometer, light drop weight tester, and dynamic plate load test, is a hand portable device that was developed in Germany to measure the soil in situ LWD dynamic modulus. Typically, this modulus is used to evaluate the subsoil degree of compaction. Thus it is suitable for compaction quality control of soil-surfaced roads, embankments and replacement fill. As a dynamic test, the device is suited, in particular, for coarse and mixed grained soils with a maximum grain size of 63 mm. The response of poorly graded calcareous and siliceous sands is the focus of this research. First, the index soil properties of the tested soils including grain size distribution; maximum and minimum void ratios and specific gravity were obtained. Petrographic analyses of the tested sands were also performed to determine their mineralogical composition. A 1-m3chamber was built for performing the LWD testing in the laboratory. The study was performed for relative densities of 20%, 40%, 60% and 80% to represent the behavior of very loose, loose, medium dense and dense sands. The effect of the existence of a rigid boundary beneath the tested soil on test results was also investigated to determine the zone of influence of the light weight deflectometer.
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- Ménard Lecture - The pressuremeter test: Expanding its use
- J.-L. Briaud ;
- Proceedings of the 18th International Conference on Soil Mechanics and Geotechnical Engineering, Paris, September 2-6 2013
- Year: 2013
- Pressuremeter
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- French Innovations in Geotechnics: the National Research Projects
- C. Bernardini ; B. Simon ; F. Rocher-Lacoste ; H. Gonin ; A. Puech ; R. Frank ; C. Plumelle ; F. Schlosser
- Proceedings of the 18th International Conference on Soil Mechanics and Geotechnical Engineering, Paris, September 2-6 2013
- Year: 2013
- Retaining Walls ; Instrumentation ; Numerical & Constitutive Modeling ; Site Characterization & In-situ Testing (General)
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- Methods of determination of K0 in overconsolidated clay
- J. Rott ; V. Novák ; R. Malát ; D. Mašín ; J Bohác
- Proceedings of the 18th International Conference on Soil Mechanics and Geotechnical Engineering, Paris, September 2-6 2013
- Year: 2013
- Site Characterization & In-situ Testing (General) ; Dilatometer ; Tunneling
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- Application of The Tangent Modulus Method in Nonlinear Settlement Analysis of Sand Foundation
- E.-Q. Wang ; Y.-C. Zhang ; Y.-D. Luo ; G.-H. Yang
- Proceedings of the 18th International Conference on Soil Mechanics and Geotechnical Engineering, Paris, September 2-6 2013
- Year: 2013
- Settlements ; Site Characterization & In-situ Testing (General)
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