In Situ Testing for Lock and Dam 26 Cellular Cofferdamby G. Wayne Clough, Virginia Polytechnic Inst &, State Univ, Blacksburg, VA, USA,
Patrick M. Goeke, Virginia Polytechnic Inst &, State Univ, Blacksburg, VA, USA,
Abstract: The in situ testing consisted of split spoon and cone penetration tests, Menard and self-boring pressuremeter tests, and Marchetti dilatometer tests. The testing program proved to be challenging because of the presence of gravels in the fill, the influence of arching caused by the soil structure interaction process, and density differences between the center and edges of the fills. Soil parameters from the in situ tests were in reasonable agreement with those obtained in laboratory tests in most cases. In situ lateral stresses were overpredicted, with those from the Marchetti dilatometer closest to the values expected. The results also show that the in situ test results are sensitive to stress changes caused by the soil-structure interaction process.
Subject Headings: Field tests | Locks (dam) | Soil tests | Lateral stress | Penetration tests | Cofferdams | Material tests | Soil structures | Materials processing | Soil-structure interaction | Mississippi River | North America | Missouri | United States
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