- Email: [email protected]
Pull-out capacity of single batter piles in sand
253A 876299 Rational approach to assess driving behaviour of long offshore piles Matos, S; Ping, W C Proc 5th International Symposium on Offshore Engineering,
Rio de Janeiro, 16-20 September, 1985 V5, P127-144. Publ London. Pentech. 1986 Offshore structures need bigger piles with greater penetration depth than those onshore. The differences between onshore and offshore piles are briefly reviewed, and the dynamic pile testing technique and interpretation of its results discussed. A rational approach to improve both the reliability of offshore pile driveability predictions and the design of long offshore piles is presented. The approach is site specific and can be used wherever sufficient site data is available.
8763OO Model for interpretation of dynamic pile driving monitoring Bon, W; Muller, M; Jardim, E B; Mello, J R C
Proc 5th International Symposium on Offshore Engineering, Rio de Janeiro, 16-20 September, 1985 V5, P145-156. Pub[ London: Pentech. 1986 In situ load testing is generally impractical for offshore piles, and dynamic pile driving monitoring plus the application of the numerical model CATWAP are used to predict bearing capacity and pile behaviour. A simplified model for the interpretation of CATWAP results, which includes the effect of soil degradation during driving, is proposed. It is demonstrated using data from platforms in the Campos Basin, Brasil.
876301 Evaluation of axial pile capacity methods based on pile driving instrumentation behaviour Mello, J R C; Niyama, S; Bon, W; Rocha, J L; Galgoul, N S; Noronha, A A Proc 5th International Symposium on Offshore Engineering,
Rio de Janeiro, 16-20 September, 1985 II5, P157-171. Publ London: Pentech. 1986 Axial pile capacities for offshore structures are usually predicted using data obtained during driving, as good site geotechnical data is almost inevitably unavailable. Differences between capacities evaluated in this manner and those based on the generally accepted API and Lambda methods are usually attributed to inaccurate site data. Extensive site geotechnical data were gathered during the installation of 7 platforms in the Campos Basin, Brazil, and used to examine the relative accuracy of the two approaches. Lambda curves are more consistent and less scattered with respect to measured curves.
876302 Pull-out capacity of single batter piles in sand Hanna, A M; Afram, A Proc 5th International Symposium on Offshore Engineering,
Rio de Janeiro, 16-20 September, 1985 V5, P172-191. Pub! London: Pentech, 1986 The pullout capacity of single rigid vertical and batter model piles in sand and subjected to axial loading has been investigated. Results are in good agreement with theoretical predictions (Meyerhof, 1973). The effect of pile inclination on pullout capacity is explained by means of a variable mobilised passive earth pressure at the pile perimeter.
876303 Offshore pile load test and tieback reinforcement Regal, S M; Engelman, G J B; da Costa Nunes, A; Suruagy, V M Proc 5th International Symposium on Offshore Engineering, Rio de Janeoo, 16-20 September, 1985 V5, PI92-204. Publ London: Pentech. 1986 Platforms in the Ubarana offshore field are subjected to severe environmental uplift loads. The conventional foundation involved driving tubular piles through the marine soils then drilling from their interiors into the sandstone bedrock and inserting steel or concrete piles. A less expensive alternative solution has been tried, where tieback anchors are installed from the tubular piles, grouted and tensioned. General characteristics of the structures and tiebacks are presented, together with results of load tests. 876304 Oseberg field, North Sea - interaction between a gravity base structure and a pile jacket structure through the foundation soil Aas, P M; Amundsen, T Proc Sixth (1987) International Mechanics and Arctic Engineering Symposium, Houston, 1-6 March 1987 V1, P305312. Publ New York: ASME, 1987 The installation of a gravity platform adjacent to a piled platform will lead to settlements and displacements in the soil surrounding the structures, which will induce stresses on the piled platform. Interaction between the structures through the soil imposes a constraint on the proximity of the structures. A computational model is described in which soil displacements due to the weight of the gravity platform and wave loadings are included in the jacket-pile-soil interaction. 876305 Effect of lateral soil movement on subsequent axial pile capacity: a finite strain analysis Nystrom, G A Proc Sixth (1987) International Mechanics and Arctic Engineering Symposium, Houston, 1-6 March 1987 VI, P313318. Publ New York: ASME, 1987 Work carried out to support a feasibility study for an offshore piled structure at a site where lateral soil creep was expected is described. Finite element analysis was used, with assumptions of no axial strain, the cavity expansion model for pile installation, and the extended Cam-clay constitutive model. Stresses around a pile were calculated for a range of lateral displacements and creep rates. For anticipated conditions, no reduction in axial pile capacity was seen, Calculated reactions agreed well with accepted P-Y design curves. 876306 Grouted driven piles Barthelemy, H; Geffriaud, J P; Legendre, Y Proc Sixth (1987) International Mechanics and Arctic Engineering Symposium, Houston, 1-6 March 1987 V I, P319327. Publ New York: ASME, I987 The technique described consists of driving piles pre-equipped with cementing lines and valves, such that the pile can be grouted after driving. It is intended to replace the drilled and grouted pile in calcareous sands. The fundamental effects of soil grouting are first examined. A friction mechanism is proposed, based on results of tests of driven and drilled and grouted piles. Available technology, the current state of development, and the economics of the grouted driven pile are discussed.
© 1987 Pergamon Journals Ltd. Reproduction not permitted
Rio de Janeiro, 16-20 September, 1985 V5, P127-144. Publ London. Pentech. 1986 Offshore structures need bigger piles with greater penetration depth than those onshore. The differences between onshore and offshore piles are briefly reviewed, and the dynamic pile testing technique and interpretation of its results discussed. A rational approach to improve both the reliability of offshore pile driveability predictions and the design of long offshore piles is presented. The approach is site specific and can be used wherever sufficient site data is available.
8763OO Model for interpretation of dynamic pile driving monitoring Bon, W; Muller, M; Jardim, E B; Mello, J R C
Proc 5th International Symposium on Offshore Engineering, Rio de Janeiro, 16-20 September, 1985 V5, P145-156. Pub[ London: Pentech. 1986 In situ load testing is generally impractical for offshore piles, and dynamic pile driving monitoring plus the application of the numerical model CATWAP are used to predict bearing capacity and pile behaviour. A simplified model for the interpretation of CATWAP results, which includes the effect of soil degradation during driving, is proposed. It is demonstrated using data from platforms in the Campos Basin, Brasil.
876301 Evaluation of axial pile capacity methods based on pile driving instrumentation behaviour Mello, J R C; Niyama, S; Bon, W; Rocha, J L; Galgoul, N S; Noronha, A A Proc 5th International Symposium on Offshore Engineering,
Rio de Janeiro, 16-20 September, 1985 II5, P157-171. Publ London: Pentech. 1986 Axial pile capacities for offshore structures are usually predicted using data obtained during driving, as good site geotechnical data is almost inevitably unavailable. Differences between capacities evaluated in this manner and those based on the generally accepted API and Lambda methods are usually attributed to inaccurate site data. Extensive site geotechnical data were gathered during the installation of 7 platforms in the Campos Basin, Brazil, and used to examine the relative accuracy of the two approaches. Lambda curves are more consistent and less scattered with respect to measured curves.
876302 Pull-out capacity of single batter piles in sand Hanna, A M; Afram, A Proc 5th International Symposium on Offshore Engineering,
Rio de Janeiro, 16-20 September, 1985 V5, P172-191. Pub! London: Pentech, 1986 The pullout capacity of single rigid vertical and batter model piles in sand and subjected to axial loading has been investigated. Results are in good agreement with theoretical predictions (Meyerhof, 1973). The effect of pile inclination on pullout capacity is explained by means of a variable mobilised passive earth pressure at the pile perimeter.
876303 Offshore pile load test and tieback reinforcement Regal, S M; Engelman, G J B; da Costa Nunes, A; Suruagy, V M Proc 5th International Symposium on Offshore Engineering, Rio de Janeoo, 16-20 September, 1985 V5, PI92-204. Publ London: Pentech. 1986 Platforms in the Ubarana offshore field are subjected to severe environmental uplift loads. The conventional foundation involved driving tubular piles through the marine soils then drilling from their interiors into the sandstone bedrock and inserting steel or concrete piles. A less expensive alternative solution has been tried, where tieback anchors are installed from the tubular piles, grouted and tensioned. General characteristics of the structures and tiebacks are presented, together with results of load tests. 876304 Oseberg field, North Sea - interaction between a gravity base structure and a pile jacket structure through the foundation soil Aas, P M; Amundsen, T Proc Sixth (1987) International Mechanics and Arctic Engineering Symposium, Houston, 1-6 March 1987 V1, P305312. Publ New York: ASME, 1987 The installation of a gravity platform adjacent to a piled platform will lead to settlements and displacements in the soil surrounding the structures, which will induce stresses on the piled platform. Interaction between the structures through the soil imposes a constraint on the proximity of the structures. A computational model is described in which soil displacements due to the weight of the gravity platform and wave loadings are included in the jacket-pile-soil interaction. 876305 Effect of lateral soil movement on subsequent axial pile capacity: a finite strain analysis Nystrom, G A Proc Sixth (1987) International Mechanics and Arctic Engineering Symposium, Houston, 1-6 March 1987 VI, P313318. Publ New York: ASME, 1987 Work carried out to support a feasibility study for an offshore piled structure at a site where lateral soil creep was expected is described. Finite element analysis was used, with assumptions of no axial strain, the cavity expansion model for pile installation, and the extended Cam-clay constitutive model. Stresses around a pile were calculated for a range of lateral displacements and creep rates. For anticipated conditions, no reduction in axial pile capacity was seen, Calculated reactions agreed well with accepted P-Y design curves. 876306 Grouted driven piles Barthelemy, H; Geffriaud, J P; Legendre, Y Proc Sixth (1987) International Mechanics and Arctic Engineering Symposium, Houston, 1-6 March 1987 V I, P319327. Publ New York: ASME, I987 The technique described consists of driving piles pre-equipped with cementing lines and valves, such that the pile can be grouted after driving. It is intended to replace the drilled and grouted pile in calcareous sands. The fundamental effects of soil grouting are first examined. A friction mechanism is proposed, based on results of tests of driven and drilled and grouted piles. Available technology, the current state of development, and the economics of the grouted driven pile are discussed.
© 1987 Pergamon Journals Ltd. Reproduction not permitted