CONTRIBUTION TO THE STUDY OF DEFLECTED MEMBERS IN SOIL. APPLICATION TO PILES AND SHEET PILES

CONTRIBUTION A L'ETUDE DES PIECES FLEICHIES DANS LE SOL. APPLICATION AUX PIEUX ET AUX PALPLANCHES

The first part of the study outlines in detail the theory of deflected members in soil, taking account of the coefficient of subgrade reaction. It is divided into two chapters dealing with clayey and sandy soil respectively. For the former, the coefficient of subgrade reaction is invariable for all depths; for the latter, the coefficient increases with depth under the free surface of the soil. Solutions are presented, the numerical values of which are presented in A tabular form. The second part examines the application of the theories outlined in part 1 to sheet pile walls, based on a publication of k. Terzaghi. It is divided into two chapters relating to clayey and sandy soil. For sheet pile walls, it is necessary to take into account the active earth pressure to study the coefficient of subgrade reaction. The conditions of compatibility or validity of the coefficient of subgrade reaction must also be taken into consideration, as they limit the pressure and corresponding deformations. Whatever the nature of the soil the study establishes that the coefficient of subgrade reaction on sheet pile walls is mainly determined by the bending of the unburned upper part; which results in the largest deformations near the free surface of the soil. The third part deals with piles. In the absence of lateral earth pressure, the same simple general formulae established in part one can be used for clayey and sandy soil, if appropriate numerical values are utilized. One chapter is devoted to groups of vertical skew plane or shallow piles; it shows the application of simple formulae for single piles to groups of piles, taking into account the group effect on the values of the coefficient of subgrade reaction. A last chapter investigates the effect of the compound flexure of long piles sunk in compressible soil. It is shown that, even in soil with low reaction, the danger of instability does not exist for piles of normal stiffness. /TRRL/

• Corporate Authors:

Liege University

Place du 20-Aout 7
Liege,   Belgium
• Authors:
• Campus, F
• Publication Date: 1971

• French

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 3-321
• Serial:

Filing Info

• Accession Number: 00099607
• Record Type: Publication
• Source Agency: Laboratoire Central des Ponts et Chausees (LCPC)
• Files: ITRD, TRIS
• Created Date: Nov 18 1975 12:00AM