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dc.contributorUnited States. Army. Corps of Engineers. St. Paul District.-
dc.contributor.authorPace, Carl E.-
dc.descriptionMiscellaneous Paper-
dc.descriptionAbstract: A stability analysis was conducted for a typical interior monolith of Pine River Dam for the following load cases : (1.) Normal operation (2.) Normal operation with truck loading (H15-44) (3.) Normal operation with earthquake (4.) Normal operation with ice (5.) High-water condition. A conventional stability analysis (rigid body assumption) was conducted to determine the approximate magnitude of the loads acting on the top of the piles, which support the dam piers. In order to obtain a detailed stability analysis of the complete monolith to resist the applied loads, the horizontal supporting characteristics of the foundation material were determined by in situ testing using a pressuremeter. Three NX core holes were drilled through typical monoliths to obtain access to the foundation material. The pressuremeter tests were performed and in situ soils data obtained. The horizontal foundation soil modulus was obtained as a variation with depth into the foundation material and with pressure. A conservative horizontal modulus of subgrade reaction was obtained and used in a three-dimensional direct stiffness analysis to determine the forces and deflections at the top of the foundation piles. A beam on an elastic foundation analysis was performed and the pressure, moment, and deflection along the length of the most critically loaded pile were determined. The compressive forces, tensile forces, and deflections predicted for the piles for all load cases were acceptable. However, the shear stresses at the top of the piles and stresses in certain piles were predicted greater than the allowable values. Therefore, it is recommended that a slant-hole, soil anchor system be used to induce compressive forces that will cause the shear and flexural stresses to be below allowables. From tests on cores, it was determined that the unconfined compressive strength (5600 psi) was adequate. There appears to be some variation in quality of the interior concrete, but it should not be detrimental as long as it does not affect the posttensioning construction. Surface concrete deterioration should be repaired. After the slant-hole soil anchors are installed and the deteriorated concrete surfaces repaired, the useful life of the dam will be appreciably lengthened.-
dc.publisherStructures Laboratory (U.S.)-
dc.publisherEngineer Research and Development Center (U.S.)-
dc.relation.ispartofseriesMiscellaneous paper (U.S. Army Engineer Waterways Experiment Station) ; SL-81-31.-
dc.rightsApproved for public release; distribution is unlimited.-
dc.sourceThis Digital Resource was created from scans of the Print Resource-
dc.subjectIn situ testing-
dc.subjectEngineering condition survey-
dc.subjectPine River Dam-
dc.subjectMississippi River headwaters-
dc.titleStructural stability evaluation : Pine River Dam-
Appears in Collections:Miscellaneous Paper

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