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NEWNEG: Microcomputer Program for Downdrag on Piles

by Jean-Louis Briaud, Texas A&M Univ, United States,
Hubert Porwoll, Texas A&M Univ, United States,



Document Type: Proceeding Paper

Part of: Foundation Engineering: Current Principles and Practices

Abstract:

A microcomputer program called NEWNEG is presented. It addresses the problem of single piles subjected to downdrag. The analytical background relies on the equilibrium of the pile and the compatibility of movements. No empiricism is used. The program input is the pile dimensions, the soil settlement profile, and the maximum friction profile. The output is the force along the pile, the settlement of the pile top, and the location of the neutral point. The program can also be used for other similar problems such as uplift on drilled shaft and piles due expansive clays, permafrost, or downdrag on bitumen coated piles.

Subject Headings: Pile settlement | Pile foundations | Soil strength | Soil settlement | Soft soils | Piles | Expansive soils

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