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Subgrade moduli for shallow foundations and piles
113A
873221 Gentle giant 'sews' secant wall Jones, H New Civ Engr N719, 11 Dec 1986, P18-20 A 145t BG-26 piling rig is in Britain for the first time demonstrating its 26t/m torque and 30t thrust. It is being used for the continuous flight augering of a secant bored pile basement in Southampton. The site is extremely sensitive being within the medieval town wall. The Bauer system requires a very powerful boring rig and a specially strengthened auger.
873222 Upper bound calculation on bearing capacity of a circular footing on a non-homogeneous clay. Technical note Kusakabe, O; Suzuki, H; Nakase, A Soils Found V26, N3, Sept 1986, P143-148 An upper bound calculation of the bearing capacity factors of a circular footing on clay, of which the strength increases linearly with depth, is presented. Results are compared with those obtained by the slip line method, and with equivalent values for square and strip footings. The calculated values of bearing capacity factor are close to those for the square footing and to those for the slip line method. The shape factor decreases significantly as soil anisotropy increases.
873223 Subgrade moduli for shallow foundations and piles Gudehus, G; Schlegel, T; Schwarz, W Proc 5th International Conference on Numerical Methods in Geomechanics, Nagoya, 1-5 April 1985 V2, P731-745. Publ Rotterdam: A. A. Balkema, 1985 The theory of subgrade modulus is analysed for beams on sand and pile dowels on a creeping slope. Despite the nonlinear behaviour of these soils, it can be theoretically and numerically proved that the moduli exist and give good approximations of the bending moments on these structures. The extensions of this theory to laterally loaded piles, walls and plates in sand and to laterally loaded piles in clay is demonstrated.
873224 Three-dimensional analysis of pile group foundation and anchor-soil system Muqtadir, A; Desai, C S; Scheele, F Proc 5th International Conference on Numerical Methods in Geomechanics, Nagoya, 1-5 April 1985 V2, P755-763. Publ Rotterdam: A. A. Balkema, 1985 A nonlinear three dimensional finite element procedure is developed to analyse soil structure interaction problems. The numerical procedure allows for elastic, nonlinear elastic and elastic-plastic hardening behaviour for soils and interfaces. The interface is modelled by using the thin-layer approach. Typical applications involve analysis of cap-pile group interaction and anchors in sand. The finite element predictions are compared with laboratory observations in the case of the cappile group and field observation for the anchor problem. Auth.
873225 Characterization of skin friction at the pile-soil interface by inverse analysis of stress waves Nishida, Y; Matsumoto, T; Fujino, T; Sekiguchi, H Proc 5th International Conference on Numerical Methods in Geomechanics, Nagoya, 1-5 April 1985 V2, P773-780. Publ Rotterdam: A. A. Balkema, 1985 A method of characterising the skin friction at a pile soil interface by inverse analysis of the stress wave has been proposed, within the framework of the one dimensional stress wave theory. The method has been verified by application to stress wave forms from model tests of pile driving using a wide range of hammer free fall heights.
873226 Horizontal behavior of pier foundations in a shearing type ground model Uto, K; Maeda, H; Yoshii, Y; Takeuchi, M; Kinoshita, K; Koga, A Proc 5th International Conference on Numerical Methods in Geomechonics, Nagoya, 1-5 April 1985 V2, P781-788. Publ Rotterdam: A. A. Balkema, 1985 Lateral loading tests were carried out on full scale pile foundations on slopes of soft rock and sand. The sliding faces around the pile form a wedge shaped mass of soil. The ground bearing capacity can be expressed by the shear force on the slip surface. For homogeneous sand, the ground reaction force on the pile increases with depth, regardless of the elastic limit of the sand. These observations mayl be explained using a Winkler type soil constitutive model.
873227 Analysis of interaction between space shear wall structure and supporting soil Jinmin, Z; Wenqing, Z; Xihong, Z Proc 5th International Conference on Numerical Methods in Geomechanics, Nagoya, 1-5 April 1985 V2, P789-796. Publ Rotterdam: A. A. Balkema, 1985 The settlement-time behaviour of a multi-storey shear wall building during construction on a layered soil has been analysed. The structure was modelled using finite element analysis, and a finite layer method was used to describe the soil. Results are compared with field data from typical tall buildings in Shanghai. Soil anisotropy does not significantly affect the behaviour of buildings constructed in this manner.
873228 Soil-structure interaction analysis and its application to foundation design in Shanghai Xihong, Z; Mingbao, C; Lee, I K; Valliappan, S Proc 5th International Conference on Numerical Methods in Geomechanics, Nagoya, 1-5 April 1985 V2, 1>805-811. Pabl Rotterdam: A. A. Balkema, 1985
Soil-structure interaction for raft or raft-pile foundations on compressible silty clay has been examined using finite element analysis with linear elastic, nonlinear elastic and elastoplastic soil models. Settlement, stress fields in the soil, distribution of foundation pressures and the effects of local softening or stiffening around the pile shaft are studied. Results are to be employed to improve foundation design in the Shanghai area.
© 1987 Pergamon Journals Ltd. Reproduction not permitted
873221 Gentle giant 'sews' secant wall Jones, H New Civ Engr N719, 11 Dec 1986, P18-20 A 145t BG-26 piling rig is in Britain for the first time demonstrating its 26t/m torque and 30t thrust. It is being used for the continuous flight augering of a secant bored pile basement in Southampton. The site is extremely sensitive being within the medieval town wall. The Bauer system requires a very powerful boring rig and a specially strengthened auger.
873222 Upper bound calculation on bearing capacity of a circular footing on a non-homogeneous clay. Technical note Kusakabe, O; Suzuki, H; Nakase, A Soils Found V26, N3, Sept 1986, P143-148 An upper bound calculation of the bearing capacity factors of a circular footing on clay, of which the strength increases linearly with depth, is presented. Results are compared with those obtained by the slip line method, and with equivalent values for square and strip footings. The calculated values of bearing capacity factor are close to those for the square footing and to those for the slip line method. The shape factor decreases significantly as soil anisotropy increases.
873223 Subgrade moduli for shallow foundations and piles Gudehus, G; Schlegel, T; Schwarz, W Proc 5th International Conference on Numerical Methods in Geomechanics, Nagoya, 1-5 April 1985 V2, P731-745. Publ Rotterdam: A. A. Balkema, 1985 The theory of subgrade modulus is analysed for beams on sand and pile dowels on a creeping slope. Despite the nonlinear behaviour of these soils, it can be theoretically and numerically proved that the moduli exist and give good approximations of the bending moments on these structures. The extensions of this theory to laterally loaded piles, walls and plates in sand and to laterally loaded piles in clay is demonstrated.
873224 Three-dimensional analysis of pile group foundation and anchor-soil system Muqtadir, A; Desai, C S; Scheele, F Proc 5th International Conference on Numerical Methods in Geomechanics, Nagoya, 1-5 April 1985 V2, P755-763. Publ Rotterdam: A. A. Balkema, 1985 A nonlinear three dimensional finite element procedure is developed to analyse soil structure interaction problems. The numerical procedure allows for elastic, nonlinear elastic and elastic-plastic hardening behaviour for soils and interfaces. The interface is modelled by using the thin-layer approach. Typical applications involve analysis of cap-pile group interaction and anchors in sand. The finite element predictions are compared with laboratory observations in the case of the cappile group and field observation for the anchor problem. Auth.
873225 Characterization of skin friction at the pile-soil interface by inverse analysis of stress waves Nishida, Y; Matsumoto, T; Fujino, T; Sekiguchi, H Proc 5th International Conference on Numerical Methods in Geomechanics, Nagoya, 1-5 April 1985 V2, P773-780. Publ Rotterdam: A. A. Balkema, 1985 A method of characterising the skin friction at a pile soil interface by inverse analysis of the stress wave has been proposed, within the framework of the one dimensional stress wave theory. The method has been verified by application to stress wave forms from model tests of pile driving using a wide range of hammer free fall heights.
873226 Horizontal behavior of pier foundations in a shearing type ground model Uto, K; Maeda, H; Yoshii, Y; Takeuchi, M; Kinoshita, K; Koga, A Proc 5th International Conference on Numerical Methods in Geomechonics, Nagoya, 1-5 April 1985 V2, P781-788. Publ Rotterdam: A. A. Balkema, 1985 Lateral loading tests were carried out on full scale pile foundations on slopes of soft rock and sand. The sliding faces around the pile form a wedge shaped mass of soil. The ground bearing capacity can be expressed by the shear force on the slip surface. For homogeneous sand, the ground reaction force on the pile increases with depth, regardless of the elastic limit of the sand. These observations mayl be explained using a Winkler type soil constitutive model.
873227 Analysis of interaction between space shear wall structure and supporting soil Jinmin, Z; Wenqing, Z; Xihong, Z Proc 5th International Conference on Numerical Methods in Geomechanics, Nagoya, 1-5 April 1985 V2, P789-796. Publ Rotterdam: A. A. Balkema, 1985 The settlement-time behaviour of a multi-storey shear wall building during construction on a layered soil has been analysed. The structure was modelled using finite element analysis, and a finite layer method was used to describe the soil. Results are compared with field data from typical tall buildings in Shanghai. Soil anisotropy does not significantly affect the behaviour of buildings constructed in this manner.
873228 Soil-structure interaction analysis and its application to foundation design in Shanghai Xihong, Z; Mingbao, C; Lee, I K; Valliappan, S Proc 5th International Conference on Numerical Methods in Geomechanics, Nagoya, 1-5 April 1985 V2, 1>805-811. Pabl Rotterdam: A. A. Balkema, 1985
Soil-structure interaction for raft or raft-pile foundations on compressible silty clay has been examined using finite element analysis with linear elastic, nonlinear elastic and elastoplastic soil models. Settlement, stress fields in the soil, distribution of foundation pressures and the effects of local softening or stiffening around the pile shaft are studied. Results are to be employed to improve foundation design in the Shanghai area.
© 1987 Pergamon Journals Ltd. Reproduction not permitted