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dc.contributor.authorGreen, A. J. (Andrew J.)-
dc.identifier.govdocTechnical Report M-70-14 Rept.1-
dc.descriptionTechnical Report-
dc.description.abstractThe study reported herein is an analysis of the penetration of circular plates and smooth-walled and rough-walled cylinders in two sands, each prepared at three strength levels. The penetration elements ranged from 2.5 to 61 cm in diameter, and the speed of penetration in all tests was 2.5 mm/sec. No basic differences were found in the shape of the penetration resistance curves for plates and cylinders, and the forces on the base of the cylinders were only slightly higher than those on the plates. The forces due to friction on the sidewalls of the cylinders were greater for the rough-walled cylinders than for the smooth, as could be. expected, but they did not vary systematically with sand density in either. case. Collapse of the data into a single function for sand was achieved by plotting a dimensionless pressure parameter P/γd versus a penetration parameter z/d. This gave evidence that pressure-sinkage relations, and thus bearing capacity, of large footings can be predicted from model tests. Dimensionless scaling relations and theoretical equations that include a friction angle term were also found to predict bearing capacity, but the problems in measuring a true friction angle make the use of these relations questionable for this purpose. The tests were deemed successful and eliminated irregularities encountered in the results of routine tests. The data should also be of great value in investigations of depth factors for bearing capacity of sand. This report will be supplemented by a report on similar tests in clay.en_US
dc.description.sponsorshipUnited States. Assistant Secretary of the Army (R & D)en_US
dc.description.tableofcontentsCONTENTS Page FOREWORD iii NOTATION vii CONVERSION FACTORS, METRIC TO BRITISH AND BRITISH TO METRIC UNITS OF MEASUREMENT ix SUMMARY. PART I: INTRODUCTION. Background . . . Purpose and Scope. PART II: SOILS, EQUIPMENT, AND TEST PROGRAM Test Soils Equipment. Test Program PART III: BEARING CAPACITY RELATIONS. Meyerhof's Equation ...... . Brinch Hansen's Equation . . . . .• Comparison of Meyerhof and Brinch Hansen Equations Dimensionless Equations. PART IV: TEST RESULTS ............ . Evaluation of Strength-Density Profiles .. Examination of Pressure-Sinkage Relations. Effects of Footing Configuration . . .. . . Evaluation of Dimensionless Forms ..... Comparison of Measured and Computed Relations. PART V: CONCLUSIONS AND RECOMMENDATIONS . Conclusions ... Recommendations. LITERATURE CITED . . . TABLE 1 PLATES 1-19-
dc.format.extent83 pages/5.463 Mb-
dc.publisherMobility and Environmental Systems Laboratory (U.S.)en_US
dc.publisherU.S. Army Engineer Waterways Experiment Station.en_US
dc.relation.ispartofseriesTechnical Report (U.S. Army Engineer Waterways Experiment Station) ; M-70-14 rept.1-
dc.rightsApproved for Public Release; Distribution is Unlimited-
dc.sourceThe ERDC Library created this digital resource using one or more of the following: Zeta TS-0995, Zeutchel OS 12000, HP HD Pro 42-in. map scanner, Epson flatbed-
dc.subjectSoil penetration testen_US
dc.subjectSoil mechanicsen_US
dc.subjectConcrete footingsen_US
dc.titlePenetration resistance of soils. Report 1, Tests with circular footings on air-dry sandsen_US
Appears in Collections:Technical Report

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