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Soil nailing: application and practice - Part 2
153A
Reinforced earth See also. 874046, 874195 874192 Soil nailing: application and practice - Part 2 Bruce, D A: Jewell, R A Ground Engng ~ 0 , NI. Jan 1987, P21-33, 38
The technique of soil nailing was introduced in Part I and contrasted with other methods of ground reinforcement and stabilisation, and the main applications described. The aim of Part 2 is to describe current good practice for soil nailing. Seven case studies are firs@ reviewed, illustrating the range of applications for soil nailing and giving construction details. Tables summarising details from published case histories worldwide are presented. On the basis of current experience, each aspect of soil nailing construction is examined to establish guidelines for good practice.
Soil stabilisation 874193 Crushed concrete fines recycled for soil modification purposes Hansen, T C; Angelo, J \V J Am Coner lnst V83, .V6, Nov-Dec 1986, P983-987
The use of crushed concrete fines as an additive to improve the engineering properties of clay' soils for earthworks was investigated. Improvements in plasticity and plastic and liquid limits were beyond those which can be explained by mechanical stabilisation due to improved grain size distribution, and it is suggested that they are the result of flocculation and coagulation of colloidal clay minerals, which react with calcium hydroxide in the crushed fines to form larger grains in the silt fraction.
Surface Structures See also. 874262 874194 Computer-aided planning and management of surface coal mines Chugh, Y P; CaudIe, R D Min Sci Technol V4, N3, March 1987, P279-290
A variety of applications of computers in surface mining operations is described. Specific examples are given of five research projects involving development and use of new computerbased planning and management techniques.
Base courses and pavements See also: 874072 874195 Construction and performance under traffic of a full-scale experimental road incorporating geotextiles Ruddock, E C; Potter. J F: McAvov. A R CIRIA Technical Note N126, 1986~ 63P
The design, construction and testing of an experimental unpaved granular pavement containing synthetic textile fabrics is described, Special attention was paid to the deformation mechanisms. The road was constructed on a London Clay
subgrade, and consisted of twelve sections, with combinations of two thicknesses of crushed granite sub-base, with and without five different geotextiles. Performance was assessed by measurements of surface deformations, vertical stress, and horizontal and vertical strains at various points and depths
Foundations See also. 874157, 874159 874196 Elastic solutions for axisymmetrically loaded circular raft with free or clamped edges founded on Winkler springs or a halfspace Hemsley, J A Inst Civ Engrs Proc V83, Part 2, March 1987, P61-90
The flexural response of an elastic circular raft is examined for different types of ground support in the form of prescribed contact pressures, Winkler springs and an elastic half space. The axisymmetric static applied loading is either a uniform pressure or a peripheral line load acting vertically downwards. Closed-form and numerical solutions are obtained for both free and clamped edge boundary conditions, and have direct application to the design of cylindrical concrete storage tanks and containment structures. Comparative results are given which illustrate the wide disparity in computed raft behaviour using the different ground models. Auth. 874197 Vertical deformation of rigid foundations of arbitrary shape on layered soil media Chow, Y K lnt J Num Anal e91eth Geomech Vll, N1, Jan-Feb 1987, P115
A numerical procedure is described for the analvsis of vertical deformation of smooth, rigid foundations of arbitrary shape on homogeneous and layered soil media. The stresses experienced by the soil are assumed to be sufficiently small such that the media behave essentially in a linear elastic manner. The soil properties are assumed to be isotropic. Parametric solutions are presented for smooth, rigid rectangular foundations on a homogeneous half-space, a homogeneous elastic stratum, a layered soil overlying a rigid base and a soil layer with stiffness increasing linearly with depth. Comparisons are made with published solutions ,.,,'here these are available. 874198 Circular plates on Pasternak elastic foundations Dumir, P C Int J Num Anal Meth Geomech V11, NI, Jan-Feb 1987, P516O
This study deals with the geometrically nonlinear axisymmetric static and transient response of cylindrically orthotropic thin circular plates resting on Pasternak elastic foundations subjected to uniformly distributed loads. Clamped and simply-supported plates with radially movable and immovable edges have been considered. The Von-Karman type nonlinear governing equations have been solved using the orthogonal point collocation method in the space domain and the Newmark-beta scheme in the time domain. The maximum transient response to step loads has also been predicted from static response. The influence of the foundation parameters on the response has been investigated. Auth.
1987 Pergamon Journals Ltd. Reproduction not permitted
Reinforced earth See also. 874046, 874195 874192 Soil nailing: application and practice - Part 2 Bruce, D A: Jewell, R A Ground Engng ~ 0 , NI. Jan 1987, P21-33, 38
The technique of soil nailing was introduced in Part I and contrasted with other methods of ground reinforcement and stabilisation, and the main applications described. The aim of Part 2 is to describe current good practice for soil nailing. Seven case studies are firs@ reviewed, illustrating the range of applications for soil nailing and giving construction details. Tables summarising details from published case histories worldwide are presented. On the basis of current experience, each aspect of soil nailing construction is examined to establish guidelines for good practice.
Soil stabilisation 874193 Crushed concrete fines recycled for soil modification purposes Hansen, T C; Angelo, J \V J Am Coner lnst V83, .V6, Nov-Dec 1986, P983-987
The use of crushed concrete fines as an additive to improve the engineering properties of clay' soils for earthworks was investigated. Improvements in plasticity and plastic and liquid limits were beyond those which can be explained by mechanical stabilisation due to improved grain size distribution, and it is suggested that they are the result of flocculation and coagulation of colloidal clay minerals, which react with calcium hydroxide in the crushed fines to form larger grains in the silt fraction.
Surface Structures See also. 874262 874194 Computer-aided planning and management of surface coal mines Chugh, Y P; CaudIe, R D Min Sci Technol V4, N3, March 1987, P279-290
A variety of applications of computers in surface mining operations is described. Specific examples are given of five research projects involving development and use of new computerbased planning and management techniques.
Base courses and pavements See also: 874072 874195 Construction and performance under traffic of a full-scale experimental road incorporating geotextiles Ruddock, E C; Potter. J F: McAvov. A R CIRIA Technical Note N126, 1986~ 63P
The design, construction and testing of an experimental unpaved granular pavement containing synthetic textile fabrics is described, Special attention was paid to the deformation mechanisms. The road was constructed on a London Clay
subgrade, and consisted of twelve sections, with combinations of two thicknesses of crushed granite sub-base, with and without five different geotextiles. Performance was assessed by measurements of surface deformations, vertical stress, and horizontal and vertical strains at various points and depths
Foundations See also. 874157, 874159 874196 Elastic solutions for axisymmetrically loaded circular raft with free or clamped edges founded on Winkler springs or a halfspace Hemsley, J A Inst Civ Engrs Proc V83, Part 2, March 1987, P61-90
The flexural response of an elastic circular raft is examined for different types of ground support in the form of prescribed contact pressures, Winkler springs and an elastic half space. The axisymmetric static applied loading is either a uniform pressure or a peripheral line load acting vertically downwards. Closed-form and numerical solutions are obtained for both free and clamped edge boundary conditions, and have direct application to the design of cylindrical concrete storage tanks and containment structures. Comparative results are given which illustrate the wide disparity in computed raft behaviour using the different ground models. Auth. 874197 Vertical deformation of rigid foundations of arbitrary shape on layered soil media Chow, Y K lnt J Num Anal e91eth Geomech Vll, N1, Jan-Feb 1987, P115
A numerical procedure is described for the analvsis of vertical deformation of smooth, rigid foundations of arbitrary shape on homogeneous and layered soil media. The stresses experienced by the soil are assumed to be sufficiently small such that the media behave essentially in a linear elastic manner. The soil properties are assumed to be isotropic. Parametric solutions are presented for smooth, rigid rectangular foundations on a homogeneous half-space, a homogeneous elastic stratum, a layered soil overlying a rigid base and a soil layer with stiffness increasing linearly with depth. Comparisons are made with published solutions ,.,,'here these are available. 874198 Circular plates on Pasternak elastic foundations Dumir, P C Int J Num Anal Meth Geomech V11, NI, Jan-Feb 1987, P516O
This study deals with the geometrically nonlinear axisymmetric static and transient response of cylindrically orthotropic thin circular plates resting on Pasternak elastic foundations subjected to uniformly distributed loads. Clamped and simply-supported plates with radially movable and immovable edges have been considered. The Von-Karman type nonlinear governing equations have been solved using the orthogonal point collocation method in the space domain and the Newmark-beta scheme in the time domain. The maximum transient response to step loads has also been predicted from static response. The influence of the foundation parameters on the response has been investigated. Auth.
1987 Pergamon Journals Ltd. Reproduction not permitted