- Email: [email protected]
Soil-pile-cap interaction analysis by finite and infinite elements
315A from the ashcrete fill. Additional data show improved performance of the ashcrete fill on further curing. The feasibility of using ashcrete was demonstrated. Its advantages under heavy load conditions are discussed and advice on placement
Foundations See also: 925063, 925112, 925248
given. 925327 Soil-pile-cap interaction analysis by finite and infinite elements Liu, W; Novak, M Can Geotech J 1/28, N6, Dec 1991, P771-783 925324 Highway cost modelling using a geoteehnical information system Akinyede, J O; gengers, N Proc 6th International Congress International Association of Engineering Geology, Amsterdam, 6-10 Augmt 1990 V3, P2349-2358. Publ Rotterdam: A A Balkema, 1990 In developing countries, costs of roadway development and maintenance are associated with geotechnical and topographical constraints. Identification of the minimum cost route at the pre-engineering stage is desirable. A terrain database, developed using remote sensing data and the ILWIS (Integrated Land and Watershed Information System) GIS, has been applied to roadway planning in NE Nigeria. Cost modelling methods are based on optimisation of grading, drainage crossings (bridges and culverts), and maintenance.
925325 Engineering geology of the Gerede-Ankara Motorway Richards, D P; Hartman, J J; Balkir, J Proc 6th International Congress International Association of Engineering Geology, Amsterdam, 6-10 August 1990 I/3, P2387-2394. Publ Rotterdam: A A Balkema, 1990 The Gerede-Ankara Motorway in Turkey will form an important component of the Trans-European Motorway. The GAM project, some 240km of dual carriageway, will include cuts of height up to 130m and volumes of 3.5 million cubic m, fills up to 50m high with volumes to 3.0 million cubic m,and 36 major crossing structures. Regional and project geology, seismicity, and topography are described. The program of geological mapping and subsurface investigation and the geotechnical design details of cuts, embankments and foundations are discussed. Particular consideration is given to the most critical aspects of the project.
925326 Use of the Dynamic Cone Penetrometer in the design of road structures
de Beer, M Proc Tenth Regional Conference for Africa on Soil Mechanics and Foundation Engineering and the Third International Conference on Tropical and Residual Soils, Maseru, 23-27 September 1991 I/1, P157-176. Publ Rotterdam: A A Balkema, 1991 The use of empirical relations between DCP measurements and structural capacity, environmental conditions, and elastic moduli of soils as a basis for empirical design of pavements is described. The link between DCP-based and traditional mechanistic analysis and design of pavements is investigated. Attention is paid to balanced pavement design in terms of layered linear elastic modelling, and a constant modulus ratio for successive layers of about 2 is suggested.
A direct analysis of pile-soil static interaction is presented with the pile and near field soil modelled by finite elements and the far field soil modelled by mapped infinite elements. Axially loaded single piles with and without caps are considered. The soil is taken as elastic or elastic-perfectly plastic and a weak zone is introduced around the pile to approximate the effects of pile-soil interface slip. Settlements, axial forces, and shear stress distributions are evaluated for a range of situations. 925328 Reliability analysis of drilled piers in expansive soils Ferregut, C; Picornell, M Can Geotech J V28, N6, Dec 1991. P834-842 Piles resting below the active zone are commonly used to support heavy structures in areas with expansive soils. During construction, the piles are unloaded and subject to potentially high tensile stresses, possibly exceeding pile tensile strength. Load transfer, potential heave when soil movement is not restrained by the pile, and capacity of the pile to resist tensile forces are examined. A probabilistic analysis is used to compute probability of exceeding limit states for vertical pile head displacement and tensile stresses in the pile. From these, serviceability performance and reliability of the pile are calculated. 925329 Bearing capacity of flexible piles under eccentric and inclined loads in layered soil. Note Yalcin, A S; Meyerhof, G G Can Geotech J 1/28, N6, Dec 1991. P909-917 Loading tests were carried out on individual model piles and small groups of flexible piles, embedded in clay overlying sand, under axial, lateral, and various combinations of eccentric and inclined loads. Eccentricity and inclination of loading and, in particular, the ratio of upper layer thickness to embedment length influence bearing capacity. Experimental values are in reasonable agreement with predictions based on the concept of effective pile embedment ratio expressed in terms of equivalent rigid piles. Single piles and 2 by 2 groups behave similarly. 925330 Piles over problem sites Oweis, I S; Zamiskie, E M Civ Engng, N Y 1/62, N4o April 1992, P62-64 Pile foundations make possible engineering structures over questionable or heavily regulated sites. In addition to mechanical considerations, possible environmental and ecological impacts of pile installation and presence must be considered. The example of use of pile foundations for support of a railroad over wetlands is illustrated. The track capacity was increased without damage to the wetlands, as would be the case if the existing embankment were widened. Pile foundations over landfills are discussed with emphasis on the need to prevent formation of preferential migration paths for pollutants.
© 1992 Pergamon Press Ltd. Reproduction not permitted
Foundations See also: 925063, 925112, 925248
given. 925327 Soil-pile-cap interaction analysis by finite and infinite elements Liu, W; Novak, M Can Geotech J 1/28, N6, Dec 1991, P771-783 925324 Highway cost modelling using a geoteehnical information system Akinyede, J O; gengers, N Proc 6th International Congress International Association of Engineering Geology, Amsterdam, 6-10 Augmt 1990 V3, P2349-2358. Publ Rotterdam: A A Balkema, 1990 In developing countries, costs of roadway development and maintenance are associated with geotechnical and topographical constraints. Identification of the minimum cost route at the pre-engineering stage is desirable. A terrain database, developed using remote sensing data and the ILWIS (Integrated Land and Watershed Information System) GIS, has been applied to roadway planning in NE Nigeria. Cost modelling methods are based on optimisation of grading, drainage crossings (bridges and culverts), and maintenance.
925325 Engineering geology of the Gerede-Ankara Motorway Richards, D P; Hartman, J J; Balkir, J Proc 6th International Congress International Association of Engineering Geology, Amsterdam, 6-10 August 1990 I/3, P2387-2394. Publ Rotterdam: A A Balkema, 1990 The Gerede-Ankara Motorway in Turkey will form an important component of the Trans-European Motorway. The GAM project, some 240km of dual carriageway, will include cuts of height up to 130m and volumes of 3.5 million cubic m, fills up to 50m high with volumes to 3.0 million cubic m,and 36 major crossing structures. Regional and project geology, seismicity, and topography are described. The program of geological mapping and subsurface investigation and the geotechnical design details of cuts, embankments and foundations are discussed. Particular consideration is given to the most critical aspects of the project.
925326 Use of the Dynamic Cone Penetrometer in the design of road structures
de Beer, M Proc Tenth Regional Conference for Africa on Soil Mechanics and Foundation Engineering and the Third International Conference on Tropical and Residual Soils, Maseru, 23-27 September 1991 I/1, P157-176. Publ Rotterdam: A A Balkema, 1991 The use of empirical relations between DCP measurements and structural capacity, environmental conditions, and elastic moduli of soils as a basis for empirical design of pavements is described. The link between DCP-based and traditional mechanistic analysis and design of pavements is investigated. Attention is paid to balanced pavement design in terms of layered linear elastic modelling, and a constant modulus ratio for successive layers of about 2 is suggested.
A direct analysis of pile-soil static interaction is presented with the pile and near field soil modelled by finite elements and the far field soil modelled by mapped infinite elements. Axially loaded single piles with and without caps are considered. The soil is taken as elastic or elastic-perfectly plastic and a weak zone is introduced around the pile to approximate the effects of pile-soil interface slip. Settlements, axial forces, and shear stress distributions are evaluated for a range of situations. 925328 Reliability analysis of drilled piers in expansive soils Ferregut, C; Picornell, M Can Geotech J V28, N6, Dec 1991. P834-842 Piles resting below the active zone are commonly used to support heavy structures in areas with expansive soils. During construction, the piles are unloaded and subject to potentially high tensile stresses, possibly exceeding pile tensile strength. Load transfer, potential heave when soil movement is not restrained by the pile, and capacity of the pile to resist tensile forces are examined. A probabilistic analysis is used to compute probability of exceeding limit states for vertical pile head displacement and tensile stresses in the pile. From these, serviceability performance and reliability of the pile are calculated. 925329 Bearing capacity of flexible piles under eccentric and inclined loads in layered soil. Note Yalcin, A S; Meyerhof, G G Can Geotech J 1/28, N6, Dec 1991. P909-917 Loading tests were carried out on individual model piles and small groups of flexible piles, embedded in clay overlying sand, under axial, lateral, and various combinations of eccentric and inclined loads. Eccentricity and inclination of loading and, in particular, the ratio of upper layer thickness to embedment length influence bearing capacity. Experimental values are in reasonable agreement with predictions based on the concept of effective pile embedment ratio expressed in terms of equivalent rigid piles. Single piles and 2 by 2 groups behave similarly. 925330 Piles over problem sites Oweis, I S; Zamiskie, E M Civ Engng, N Y 1/62, N4o April 1992, P62-64 Pile foundations make possible engineering structures over questionable or heavily regulated sites. In addition to mechanical considerations, possible environmental and ecological impacts of pile installation and presence must be considered. The example of use of pile foundations for support of a railroad over wetlands is illustrated. The track capacity was increased without damage to the wetlands, as would be the case if the existing embankment were widened. Pile foundations over landfills are discussed with emphasis on the need to prevent formation of preferential migration paths for pollutants.
© 1992 Pergamon Press Ltd. Reproduction not permitted