- Email: [email protected]
Mathematical theory of freezing for flow in porous medi
84A
SURFACE STRUCTURES:GEOLOGICAL FACTORS
962290 A review of some of the properties of Genseal MQ-5 and silicate-Hardener 600B grouts M. Mollamahmutoglu & G. S. Littlejohn, Ground Engineering, 28(7), 1995, pp 44-48. The purpose of this paper is to provide dam on some physicochemical characteristics such as initial viscosity, viscosity-time development, syneresis and gel time for Genseal MQ-5 and silicate-Hardener 600B chemical grouts. The results of permeation tests are also described with particular reference to groutability of Leighton Buzzard Sand and Thames Ballast Sand using the two chemical grout systems. Unconfined compressive strengths of the grounted sands are provided where permeation has been achieved. (Authors)
Reinforced earth and geosynthetics 962291 Standards for eoir erosion and sedimentation control products L. Santha & C. R. Santha, in: Carrying the torch for erosion control." an Olympic task. Proc. conference XXVI, Atlanta, 1995, (International Erosion Control Association), 1995, pp 423-432. This paper discusses two widely used coir erosion control products (colt polypropylene netted blankets and woven coir blankets) their performance and properties related to type of coir used in the blankets. It compares the tested physical properties of three types of woven coir blankets available in the market. Finally, it discusses several characteristics of coir blankets that need to be considered when specifying the product. (from Authors) 962292 Effectiveness of selected materials under simulated rain and sunlight G. E. Urroz & C. E. Israelsen, in: Carrying the torch for erosion control: an Olympic task. Proc. conference XXVI, Atlanta, 1995, (International Erosion Control Association), 1995, pp 361-372. Tests performed for a set of 19 different erosion control products are used to evaluate the effectiveness of those products in controlling erosion in a sandy-loam soil. Results include values of soil erosion and water runoff from test plots for each of the products tested, and evaluation of the plant height, germination rates and dry weight after six days of growth under a sunlight simulator. Products tested include eleven different hydromulches and eight different erosion control blankets. (from Authors) 962293 Tannery Creek - bioengineered stream realignment J. G. Wraith, in: Carrying the torch for erosion control." an Olympic task. Proc. conference XXVI, Atlanta, 1995, (International Erosion Control Association), 1995, pp 75-88. Two sections of the Tannery Creek watercourse were subject to realignment to accommodate the widening of an adjacent road. A bioengineered stream realignment solution was proposed and was subsequently approved and installed. The proposed solution resulting in no net loss of habitat contained the following elements: natural channel geometry, native material revetments, vortex rock weirs, geocoir erosion control material, live stakes, fascine bundles and Propasys rapid revegetation system. (from Authors)
Soil stabilisation 962294 Mathematical theory of freezing for flow in porous media K. Kornev & G. Mukhamadullina, Proceedings - Royal Society of London, A, 447(1930), 1994, pp 281-297. It is shown that the problem of determining the equilibrium shape of bodies formed by freezing of flow in porous medium
can he reduced to the Riemann problem with displacement. A solitary body and linear array of bodies are used as example. Algorithms for determining its boundary is constructed and realized. All results are presented in the graphic form and they correspond to wide diapason of physical parameters. (from Authors)
Soil compaction 962295 Ultimate strength of rimmed earth walls with Ol~alngs D. M. Liiley & J. Robinson, Proceedings ICE: Structures & Buildings, 110(3), 1995, pp 278-287. Rammed earth (pise) produced from naturally occurring and readily accessible lateritic soil is used in some developing countries to provide walls in low-cost housing and similar developments, mostly of one or two storeys. Such structures can readily be produced by manual compaction of moistened laterite between vertical formwork, using simple tools. Experimental tests have been undertaken to investigate the behaviour and ultimate strength of rammed earth. The ultimate strength of cubes of rammed earth increased within the first 7 days to about 2 N/ram 2, although in some cases this reduced to about 1.8 N/mm" after 28 days. The ultimate strength of rammed earth walls with substantial openings (as might he provided for windows and doors) suggested that a safety factor ranging between 8 and 40 would exist under conditions of normal domestic use. Although no clear failure mechanism could he identified in walls with curved or pointed arched openings, these were generally stronger than walls with rectangular openings. Steel bars used as reinforcement within walls with rectangular openings did not appear to increase the ultimate strength, although they served to localize damage under failure conditions. Lightweight material falling from the soffit of an opening in a rammed earth wall gave a visual indication of imminent collapse. Deformations within rammed earth under substantial maintained load are likely to continue for at least seven weeks from the time of application, although about 80% of the final deformation is likely to occur within two weeks. (from Authors) -
SURFACE STRUCTURES General 962296 Back to the wall H. Russell, New Civil Engineer (NCE), 1139, 1995, pp 2224. Refurbishment work being carried out on an old dock wall in Plymouth is described. Details from the original 19th century specification for the wall have proved invaluable for matching the mortar. Because the wall is protected as an ancient monument, consultant and client are working closely with English Heritage on the project. Development of a replacement mortar for the wall is discussed. (P.M.Taylor)
Geological factors 962297 L'action de la geologie appliquee dans ies etudes des sites de centrales nucleaires (The part played by appfied geology in nuclear power plant site studies) J.-L. Giafferi, Memoires - Societe Geologique de France, 162, 1993(1994), pp 163-172. The site geological criteria art not solely restricted to the soil as a static support for the structures. Compared to other parts of the world, earth tremors in certain countries like France are of moderate intensity but the likelihood of their occurrence must be taken into account for each site. Allowance
SURFACE STRUCTURES:GEOLOGICAL FACTORS
962290 A review of some of the properties of Genseal MQ-5 and silicate-Hardener 600B grouts M. Mollamahmutoglu & G. S. Littlejohn, Ground Engineering, 28(7), 1995, pp 44-48. The purpose of this paper is to provide dam on some physicochemical characteristics such as initial viscosity, viscosity-time development, syneresis and gel time for Genseal MQ-5 and silicate-Hardener 600B chemical grouts. The results of permeation tests are also described with particular reference to groutability of Leighton Buzzard Sand and Thames Ballast Sand using the two chemical grout systems. Unconfined compressive strengths of the grounted sands are provided where permeation has been achieved. (Authors)
Reinforced earth and geosynthetics 962291 Standards for eoir erosion and sedimentation control products L. Santha & C. R. Santha, in: Carrying the torch for erosion control." an Olympic task. Proc. conference XXVI, Atlanta, 1995, (International Erosion Control Association), 1995, pp 423-432. This paper discusses two widely used coir erosion control products (colt polypropylene netted blankets and woven coir blankets) their performance and properties related to type of coir used in the blankets. It compares the tested physical properties of three types of woven coir blankets available in the market. Finally, it discusses several characteristics of coir blankets that need to be considered when specifying the product. (from Authors) 962292 Effectiveness of selected materials under simulated rain and sunlight G. E. Urroz & C. E. Israelsen, in: Carrying the torch for erosion control: an Olympic task. Proc. conference XXVI, Atlanta, 1995, (International Erosion Control Association), 1995, pp 361-372. Tests performed for a set of 19 different erosion control products are used to evaluate the effectiveness of those products in controlling erosion in a sandy-loam soil. Results include values of soil erosion and water runoff from test plots for each of the products tested, and evaluation of the plant height, germination rates and dry weight after six days of growth under a sunlight simulator. Products tested include eleven different hydromulches and eight different erosion control blankets. (from Authors) 962293 Tannery Creek - bioengineered stream realignment J. G. Wraith, in: Carrying the torch for erosion control." an Olympic task. Proc. conference XXVI, Atlanta, 1995, (International Erosion Control Association), 1995, pp 75-88. Two sections of the Tannery Creek watercourse were subject to realignment to accommodate the widening of an adjacent road. A bioengineered stream realignment solution was proposed and was subsequently approved and installed. The proposed solution resulting in no net loss of habitat contained the following elements: natural channel geometry, native material revetments, vortex rock weirs, geocoir erosion control material, live stakes, fascine bundles and Propasys rapid revegetation system. (from Authors)
Soil stabilisation 962294 Mathematical theory of freezing for flow in porous media K. Kornev & G. Mukhamadullina, Proceedings - Royal Society of London, A, 447(1930), 1994, pp 281-297. It is shown that the problem of determining the equilibrium shape of bodies formed by freezing of flow in porous medium
can he reduced to the Riemann problem with displacement. A solitary body and linear array of bodies are used as example. Algorithms for determining its boundary is constructed and realized. All results are presented in the graphic form and they correspond to wide diapason of physical parameters. (from Authors)
Soil compaction 962295 Ultimate strength of rimmed earth walls with Ol~alngs D. M. Liiley & J. Robinson, Proceedings ICE: Structures & Buildings, 110(3), 1995, pp 278-287. Rammed earth (pise) produced from naturally occurring and readily accessible lateritic soil is used in some developing countries to provide walls in low-cost housing and similar developments, mostly of one or two storeys. Such structures can readily be produced by manual compaction of moistened laterite between vertical formwork, using simple tools. Experimental tests have been undertaken to investigate the behaviour and ultimate strength of rammed earth. The ultimate strength of cubes of rammed earth increased within the first 7 days to about 2 N/ram 2, although in some cases this reduced to about 1.8 N/mm" after 28 days. The ultimate strength of rammed earth walls with substantial openings (as might he provided for windows and doors) suggested that a safety factor ranging between 8 and 40 would exist under conditions of normal domestic use. Although no clear failure mechanism could he identified in walls with curved or pointed arched openings, these were generally stronger than walls with rectangular openings. Steel bars used as reinforcement within walls with rectangular openings did not appear to increase the ultimate strength, although they served to localize damage under failure conditions. Lightweight material falling from the soffit of an opening in a rammed earth wall gave a visual indication of imminent collapse. Deformations within rammed earth under substantial maintained load are likely to continue for at least seven weeks from the time of application, although about 80% of the final deformation is likely to occur within two weeks. (from Authors) -
SURFACE STRUCTURES General 962296 Back to the wall H. Russell, New Civil Engineer (NCE), 1139, 1995, pp 2224. Refurbishment work being carried out on an old dock wall in Plymouth is described. Details from the original 19th century specification for the wall have proved invaluable for matching the mortar. Because the wall is protected as an ancient monument, consultant and client are working closely with English Heritage on the project. Development of a replacement mortar for the wall is discussed. (P.M.Taylor)
Geological factors 962297 L'action de la geologie appliquee dans ies etudes des sites de centrales nucleaires (The part played by appfied geology in nuclear power plant site studies) J.-L. Giafferi, Memoires - Societe Geologique de France, 162, 1993(1994), pp 163-172. The site geological criteria art not solely restricted to the soil as a static support for the structures. Compared to other parts of the world, earth tremors in certain countries like France are of moderate intensity but the likelihood of their occurrence must be taken into account for each site. Allowance