Modelling of Displacement Piles in Sand Using a Pressure Chamber


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by C. Vipulanandan, Univ of Houston, United States,
D. Wong, Univ of Houston, United States,
M. Ochoa, Univ of Houston, United States,
M. W. O'Neill, Univ of Houston, United States,



Document Type: Proceeding Paper

Part of: Foundation Engineering: Current Principles and Practices

Abstract: This paper describes a method of modelling the driving and loading of piles in the laboratory that permits variations of significant parameters and maintains effective stresses at levels that simulate in-situ conditions. A specific example is also described, in which the behavior of a displacement pile was studied under varying conditions of relative density and in-situ stress in a poorly graded, clean, submerged, fine siliceous sand. The laboratory testing system consists of a pressure chamber termed the 'long, variable lateral pressure soil column' (LVLPSC), soil deposition equipment, instrumented model pile, impact hammer, portable loading-test equipment, and digital and analog data acquisition systems.

Subject Headings: Soil pressure | Lateral pressure | Piles | Pressure vessels | Lateral loads | Load factors | Effective stress | Field tests |

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