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Pile testing in a centrifuge
19~A
total load. The ultimate load of the piles was also predicted from the load-settlement data by assuming that they obeyed a hyperbolic relationship, and from the work of Dutch cone perm~rometer sourdlngs. 836228 LATERALLY LOADED PILES IN LAYERED SOILS Reese, L C; Allen, J D; Hargrove, J 0 Proc lOth International Conferemce on Soil Mechanics and Foundatiom Er~ineering, Stockholm, 15-19 June 1981, V2, i~19-822. Pmbl Rotterdam: A. A. Balkema, 1981
Model pile tests have been performed in a centrifuge to compare model behavlour with that of prototype piles under lateral load. Axial load tests were also carried out on a larger model pile. The tests were all carried out in a dense, saturated, fine sand. 836233 P R E S ~ ' , ' ~ AND PILE FOUNDATIONS Sellgren, E Proc lOth International Conference on Soil Mechanics and Foundation Engineering,
stockholm, 15-19 june 1981, ~ , ~3-8~6. Publ Rotterdam: A. A. Balkema, 1981
A series of experiments were performed to investigate the behavlo~r of piles ~mder lateral loading in layered soils. Tests were conducted with a 25ram diameter pile in the laboratory a~d ~Ith a 152~z diameter pile in the field. Experimental results were compared to results from a:~lyses, and fair to good a~reement was obtained with the assumption that the behavlom" of the individual layers was the same as if all of the soil was ur~ifcrm in characteristics. A~th.
836229 BEHAVIOUR
OF ~MALL DIAMETER B(~ED PILES U N D ~ AXIAL LOAD Sabini, G; Sapio, G Prom lOth Interratiomal Conference on Soil Mechanics amd Foundation Er~i:~-ering, Stockholm, 15-I 9 June 1981, V2, P623-828. Publ Rotterdam: A. A. Balkema, 1981 Loading tests up to a maximm~ of 700EN were carried out on two instrl~aented ~mR11 diameter (127ram) bored piles. Both piles were drilled in a volcanic subsoil, the first one floating in 'pozzolana' and the secor~ end-bearing to a tuff substratum. Results indicate a much higher side resistance than expected according to conventional bearing capacity thec~ies.
836230 EkrE~IENCE WITH DYNAMICALLY TESTED PILES Santoyo, E; Goble, G G Proc lOth Internatiomal Conference on Soil Mechanics and Foundation Engineering, Stockholm, 15-19 June 1981, V2, P829-832 . Publ Rotterdam: A. A. Balkmna, 1981 A dynsm~c testing progranlne was carried out for the design of pile foundations f ~ a steel mill in Mexico. Case method results from a field electronic amlyser and CAPWAP dynamic analysis accurately predicted the ultimate load static capacity. 836231 GROUP ACTION OF LATERALLY LOADED B O R ~ PILES Sch~ddt, H G Proc lOth International Conference on Soil Mechanics and Foumdation Engineering, Stockholm, 15-19 June 1981, V2, P633-837. Publ Rotterdam: A. A. Balkema, 1981 Groups of vertical bored piles f ~ piers or abutments must be designed to withstand lateral loads. Results from lateral load tests run on large diameter bored piles are described, amd the soil-pile interaction is discussed. A testing equipment for investigating 2-pile groups is presented. Auth. 836232 PILE TESTING IN A CENTRIFUGE Scott, R F Proc 10th International Conference on Soll Mechanics and Foumdation Er~Ineering, Stockholm, 15-19 JUne 1981, V2, P639-8~2. Publ Rotterdam: A. A. Balkema, 1981
Pressuremeter tests were carried out in the soils at 2 sites in S~eden. Loading tests were then perfc~-med on instrumented driven concrete friction piles at these sites. Total load, shaft resistance, point resistance, critical load and settlement were all measured. The pressuremeter results were also used to calculate these parameters a~d agreement between the measured and calculated results was found to be good. 83623~ DETEEMINATYON OF PILES BEARING CAPACITY Simvulidi, J A; Bakholdin, B V; Voronkov, J Y Proc lOth International Conference on Soil Mechanics ard Fo%hndation Engineering, Stockholm, 15-19 June 1981, V2, P8~7-850. Publ Rotterdam: A. A. Balkema, 1981 An ex!~ession f ~ the bearillg capacity of the piles was derived based upon the solution of the equilibrium equation of the expended and useful power of impact during impact loading. Experimental investigations were carried out to develop methods to calculate the negative friction fcrces while determining the pile bearing capacity. It is proposed that the difference between soil and pile settlement rate should be taken as the criterion governing the c~igin of these fc~ces. 836235 BUCKliNG OF PILES WITH INITIAL CURVATURE Sovlnc, I Proc lOth International Conference on Soil Mechanics and Foundation Engineering, Stockholm, 15-19 June 1981, V2, P851-856. Publ Rotterdam: A. A. Balkema, 1981 The paper examines the problem of the buckling of foundation piles, with initial curvature, under axial load. A solution was obtained for a pile driven through soft soil, in which the coefficient of horizontal soil reaction increases with depth, to bearing strata. The critical buckling load was computed for the case of a steel pipe pile for elastic-plastic state of stress by the finite element method. The numerical examples are compared with the results obtained by the test loading of a hOrn long pipe pile with ir_itial curvature and maximum lateral deflection over 50cm. The investigation was carried out for remedial measures for a piled marine structure which had been seriously damaged during dredging operations in front of the wharf. Auth. 836236 INSTRUMENTED MODEL PILES JACKED IN90 CLAY Steemfelt, J S; Randoll~, M F; Wroth, C P Proc 10th International Conference on Soll Mechanics ard Foundation Engineering, Stockholm, 15-19 June 1981, V2, P857-86~. Publ Rotterdam: A. A. Balkema, 1981
total load. The ultimate load of the piles was also predicted from the load-settlement data by assuming that they obeyed a hyperbolic relationship, and from the work of Dutch cone perm~rometer sourdlngs. 836228 LATERALLY LOADED PILES IN LAYERED SOILS Reese, L C; Allen, J D; Hargrove, J 0 Proc lOth International Conferemce on Soil Mechanics and Foundatiom Er~ineering, Stockholm, 15-19 June 1981, V2, i~19-822. Pmbl Rotterdam: A. A. Balkema, 1981
Model pile tests have been performed in a centrifuge to compare model behavlour with that of prototype piles under lateral load. Axial load tests were also carried out on a larger model pile. The tests were all carried out in a dense, saturated, fine sand. 836233 P R E S ~ ' , ' ~ AND PILE FOUNDATIONS Sellgren, E Proc lOth International Conference on Soil Mechanics and Foundation Engineering,
stockholm, 15-19 june 1981, ~ , ~3-8~6. Publ Rotterdam: A. A. Balkema, 1981
A series of experiments were performed to investigate the behavlo~r of piles ~mder lateral loading in layered soils. Tests were conducted with a 25ram diameter pile in the laboratory a~d ~Ith a 152~z diameter pile in the field. Experimental results were compared to results from a:~lyses, and fair to good a~reement was obtained with the assumption that the behavlom" of the individual layers was the same as if all of the soil was ur~ifcrm in characteristics. A~th.
836229 BEHAVIOUR
OF ~MALL DIAMETER B(~ED PILES U N D ~ AXIAL LOAD Sabini, G; Sapio, G Prom lOth Interratiomal Conference on Soil Mechanics amd Foundation Er~i:~-ering, Stockholm, 15-I 9 June 1981, V2, P623-828. Publ Rotterdam: A. A. Balkema, 1981 Loading tests up to a maximm~ of 700EN were carried out on two instrl~aented ~mR11 diameter (127ram) bored piles. Both piles were drilled in a volcanic subsoil, the first one floating in 'pozzolana' and the secor~ end-bearing to a tuff substratum. Results indicate a much higher side resistance than expected according to conventional bearing capacity thec~ies.
836230 EkrE~IENCE WITH DYNAMICALLY TESTED PILES Santoyo, E; Goble, G G Proc lOth Internatiomal Conference on Soil Mechanics and Foundation Engineering, Stockholm, 15-19 June 1981, V2, P829-832 . Publ Rotterdam: A. A. Balkmna, 1981 A dynsm~c testing progranlne was carried out for the design of pile foundations f ~ a steel mill in Mexico. Case method results from a field electronic amlyser and CAPWAP dynamic analysis accurately predicted the ultimate load static capacity. 836231 GROUP ACTION OF LATERALLY LOADED B O R ~ PILES Sch~ddt, H G Proc lOth International Conference on Soil Mechanics and Foumdation Engineering, Stockholm, 15-19 June 1981, V2, P633-837. Publ Rotterdam: A. A. Balkema, 1981 Groups of vertical bored piles f ~ piers or abutments must be designed to withstand lateral loads. Results from lateral load tests run on large diameter bored piles are described, amd the soil-pile interaction is discussed. A testing equipment for investigating 2-pile groups is presented. Auth. 836232 PILE TESTING IN A CENTRIFUGE Scott, R F Proc 10th International Conference on Soll Mechanics and Foumdation Er~Ineering, Stockholm, 15-19 JUne 1981, V2, P639-8~2. Publ Rotterdam: A. A. Balkema, 1981
Pressuremeter tests were carried out in the soils at 2 sites in S~eden. Loading tests were then perfc~-med on instrumented driven concrete friction piles at these sites. Total load, shaft resistance, point resistance, critical load and settlement were all measured. The pressuremeter results were also used to calculate these parameters a~d agreement between the measured and calculated results was found to be good. 83623~ DETEEMINATYON OF PILES BEARING CAPACITY Simvulidi, J A; Bakholdin, B V; Voronkov, J Y Proc lOth International Conference on Soil Mechanics ard Fo%hndation Engineering, Stockholm, 15-19 June 1981, V2, P8~7-850. Publ Rotterdam: A. A. Balkema, 1981 An ex!~ession f ~ the bearillg capacity of the piles was derived based upon the solution of the equilibrium equation of the expended and useful power of impact during impact loading. Experimental investigations were carried out to develop methods to calculate the negative friction fcrces while determining the pile bearing capacity. It is proposed that the difference between soil and pile settlement rate should be taken as the criterion governing the c~igin of these fc~ces. 836235 BUCKliNG OF PILES WITH INITIAL CURVATURE Sovlnc, I Proc lOth International Conference on Soil Mechanics and Foundation Engineering, Stockholm, 15-19 June 1981, V2, P851-856. Publ Rotterdam: A. A. Balkema, 1981 The paper examines the problem of the buckling of foundation piles, with initial curvature, under axial load. A solution was obtained for a pile driven through soft soil, in which the coefficient of horizontal soil reaction increases with depth, to bearing strata. The critical buckling load was computed for the case of a steel pipe pile for elastic-plastic state of stress by the finite element method. The numerical examples are compared with the results obtained by the test loading of a hOrn long pipe pile with ir_itial curvature and maximum lateral deflection over 50cm. The investigation was carried out for remedial measures for a piled marine structure which had been seriously damaged during dredging operations in front of the wharf. Auth. 836236 INSTRUMENTED MODEL PILES JACKED IN90 CLAY Steemfelt, J S; Randoll~, M F; Wroth, C P Proc 10th International Conference on Soll Mechanics ard Foundation Engineering, Stockholm, 15-19 June 1981, V2, P857-86~. Publ Rotterdam: A. A. Balkema, 1981