+ Most Popular
Cunninghamia lanceolata plantations in China
Mammalian lairs in paleo ecological studies and palynology
Studies on technological possibilities in utilization of anhydrous milk fat for production of recombined butter-like products
Should right-sided fibroelastomas be operated upon?
Large esophageal lipoma
Apoptosis in the mammalian thymus during normal histogenesis and under various in vitro and in vivo experimental conditions
Poissons characoides nouveaux ou non signales de l'Ilha do Bananal, Bresil
Desensitizing efficacy of Colgate Sensitive Maximum Strength and Fresh Mint Sensodyne dentifrices
Administration of fluid by subcutaneous infusion: revival of a forgotten method
Tundra mosquito control - an impossible dream?
Schizophrenia for primary care providers: how to contribute to the care of a vulnerable patient population
Geochemical pattern analysis; method of describing the Southeastern limestone regional aquifer system
Incidence of low birth weights in a hospital of Mexico City
Graded management intensity of grassland systems for enhancing floristic diversity
Microbiology and biochemistry of cheese and fermented milk
The ember tetra: a new pygmy characid tetra from the Rio das Mortes, Brazil, Hyphessobrycon amandae sp. n. (Pisces, Characoidei)
Risk factors of contrast-induced nephropathy in patients after coronary artery intervention
Renovation of onsite domestic wastewater in a poorly drained soil
Observations of the propagation velocity and formation mechanism of burst fractures caused by gunshot
Systolic blood pressure in a population of infants in the first year of life: the Brompton study
Haematological studies in rats fed with metanil yellow
Studies on pasteurellosis. I. A new species of Pasteurella encountered in chronic fowl cholera
Dormancy breaking and germination of Acacia salicina Lindl. seeds
therapy of lupus nephritis. a two-year prospective study

The standard penetration test in insensitive clays and soft rocks

The standard penetration test in insensitive clays and soft rocks

Proceedings of the European Symposium on Penetration Testing, Stockholm, June 5-7, 1974 2(2): 367-375

A simple correlation appears to exist in many insensitive clays and weak rocks between N values and mass in situ shear strength. The correlation is of the form c=fl × N. Down to at least 50 m. below ground level, fl appears to be essentially independent of depth and of discontinuity spacing in the clay up to at least 200 mm. The value of fl is found to increase with decreasing plasticity index and varies from about 4.0 kN/m2 in materials of high plasticity to about 6.0 kN/m2 in materials of medium plasticity. For many of the harder and more brittle clays, the results are more variable but this may be largely due to the increased difficulty of sampling and triaxial testing in these materials. The lowest value of f1 obtained was 3.1 kN/m2. A similar correlation of the form my=1/f2N also appears to exist for the coefficient of volume compressibility. In this case f2 increases from about 400 kN/m2 for highly plastic materials to over 600 kN/m2 for materials with a P.I. less than 20%. The scatter of cu and my results derived from N values is generally -considerably less than those obtained by sampling and testing in the laboratory. 4. Evidence is given to suggest that the Standard Penetration Test coupled with quasi elastic theory may provide a rational and straightforward approach to the problem of estimating settlement of structures on a wide variety of over-consolidated soil materials. A simple correlation between N value and the vertical drained modulus of elasticity Ev' is indicated. The Standard Penetration Test is by very nature a crude and unsophisticated in situ testing technique. This may be its strongest advantage. Provided the equipment is standard and the execution is properly supervised, there is little room for deviation. To obtain field samples for testing in the laboratory, on the other hand, involves many more operations and the risk of sample disturbance Is particularly severe in hard fissured clays, weak rocks and many glacial deposits. Moreover a large number of samples needs to be tested to obtain a representative trend. It is not intended to imply that S. P. T. s should replace conventional sampling and testing methods where these are possible; rather that they should supplement them. In this way and at very little extra cost not only is there a useful double 'stab' at the required soil parameters but data on shear strength, compressibility and settlement behaviour becomes available at a very early design stage. In materials where sampling Is particularly difficult or impossible, the indications of this study are that the Standard Penetration Test can provide one of the few simple means of obtaining valuable and reliable design I data.

Please choose payment method:

(PDF emailed within 1 workday: $29.90)

Accession: 020448105

Download citation: RISBibTeXText

Related references

Relationship between the standard penetration test and the pressuremeter test on sandy silty clays; a case study from Denizli. Bulletin of Engineering Geology and the Environment 67.3, 2008

Ball penetration test for characterisation of soft clays. Proceedings of the Institution of Civil Engineers - Geotechnical Engineering, 2017

Undrained shear strength of soft clays from push cone penetration test. Geotechnique 51(2): 167-168, 2001

Use of the Standard Penetration Test for ground interpretations Some examples from Peninsular Malaysia - Utilisation du Standard Penetration Test dans l'étude de sols en Malaisie. International Association of Engineering Geology. International Congress 5: 839-846, 1986

Corrélations entre les résultats du Standard Penetration Test et du Cone Penetration Test pour les taux de pénétration de la vibroforeuse sur le fond de la mer. Delt. Kent. Ereun. Demosion Erg (3-4): 75-81, 1985

Correlation between results of the Standard Penetration Test and the Cone Penetration Test for rates of penetration of the vibro drill in ocean floors. Deltion Kentron Ereunon Demosion Ergon = Bulletin of the Public Works Research Center 3-4: 75-81, 1985

Needle penetration test Evaluation of its performance and possible uses in predicting strength of weak and soft rocks. Engineering Geology 149-150(none), 2012

Needle penetration test: Evaluation of its performance and possible uses in predicting strength of weak and soft rocks. Engineering Geology 149-150: 47-56, 2012

Prediction of the undrained shear strength and standard penetration test using the static cone penetration test data. Proceedings of the Regional Conference for Africa - Soil Mechanics and Foundation Engineering 9(1): 185-192, 1987

Estimating Liquefaction-Induced Lateral Displacements Using the Standard Penetration Test or Cone Penetration Test. Journal of Geotechnical and Geoenvironmental Engineering 130(8): 861-871, 2004

A method for correlating large penetration test LPT to standard penetration test SPT blow counts. Canadian Geotechnical Journal = Revue Canadienne de Geotechnique 40(1): 66-77, 2003

Evaluation of liquefaction-resistance of soils using standard penetration test, cone penetration test, and shear-wave velocity data for Dhaka, Chittagong, and Sylhet cities in Bangladesh. Environmental Earth Sciences 76(5): 207, 2017

Interpretation of Impact Penetration Measurements in Soft Clays. Journal of Geotechnical and Geoenvironmental Engineering 132(6): 770-777, 2006

Miniature cone penetration tests in soft and stiff clays. Astm Geotechnical Testing Journal 23(4): 432-443, 2000

Static penetration tests and compressibility of soft normally consolidated clays. Pages 149-156 1975, 1975