- Email: [email protected]
Control and laying of soil-fibre material Texsol and its in situ characteristics (In French)
180A 923325 Installation survivability of geotextiles and geogrids Koerner, G R; Koerner, R M Proc 4tk i m e r ~ p n a l Coaference on Geotextiles, Geomembraues and Related Produets, The Hague, 28 May-I June 1990 V2, P597-602. Publ Rotterdam: ,4 ,4 Balkema, 1990
Reinforced earth See also: 923123
923321 Control and laying of soil-fibre material Texsoi and its in situ characteristics (In French) Khay, M; Matichard, Y; Yoshioka, A Bull Liaison Labs Ponts Clmuesees N174, July-Aug 1991, P47-59 Two major factors influence the in situ properties of Texsol material, the constituent mixture and the method of laying. Three types of equipment for producing the intimate mixture of fibres and granular material are illustrated. Principles of control of constituents, laying and compaction are described. Current procedures of quality assessment, including test methods, are presented.
923322 Geotextiles in landfill closures Christopher, B R Geotext Geomem VIO, N5-6, 1991, 1'459-470 Each landfill generates an individual set of requirements for cover design. Geotextiles can find many applications: stabilisation of landfill surface to allow final cover construction; gas vent layer; protection of the geomembrane; friction improvement between geomembrane and cohesive soils; filter layers for soil drainage; and separation media for biotic barriers. These aspects are considered with reference to available design literature.
923323 Geogrid reinforcement in landfill closures Carroll, R G; Chouery-Curtis, V Geotext Geomem VIO, N5-6, 1991, P471-486 G-eogrids find applications in landfill closures both to maintain the stability of the soil cover layer and to support the geomembrane in the event of deformation due to subsidence or differential settlement. Minimisation of tensile stress in the geomembrane is the design aim. Case histories of each application are presented, with construction and function described in detail. Account must be taken of long term behaviour and properties of the geosynthetics.
923324 Comlmter aided design of geosynthetic reinforced soil walls. Technical note Mandal, J N; Jambale, K S lnt J Geotecit Geol Faegag V9, N2, June 1991, P139-151 Design of a reinforced earth wall in which lateral pressures are resisted by tensile forces in the strips of geosynthetics is presented. The procedure has been simplified by development of a computer program which allows for variation in length, spacing, and type of material while ensuring structural stability. Tensile forces in the reinforcement under vertical and horizontal strip loads and the effect of external load location on the failure surface are examined.
Exhumation, generally after zero service, of 75 different geosynthetics was carried out to allow assessment of amount and nature of installation damage. Percentage strength retained varied from 13-100, and number of holes per square metre from 0 to 120. There was no apparent correlation between strength loss and number of holes. Results showed coarse, angular and frozen subgrades were very damaging. Thin cover soil lifts and heavy construction machinery led to major damage. Low mass per unit area geotextiles showed greatest strength loss and number of holes. Large cover soil particles and poorly graded mixes caused problems. 923326 Site damage trials on geotextiles Watts, G R A; Brady, K C Proc 4th International Conference on Geotextiles, Geomembrnaes and Related Products, The Hague, 28 May- I June 1990 V2, P603-607. Publ Rotterdam: A ,4 Balkema, 1990 The effects of construction of a reinforced compacted fill on the reinforcing elements were examined using 3 nonwoven geotextiles and 1 geogrid with crushed limestone fill. The fill was compacted according to DTp Specifications for Highway Works. A special procedure was designed to retrieve the reinforcement for examination without inflicting further damage. Damage assessment by visual inspection generally correlated with that in terms of lowering of tensile strength and failure strain. The degree of damage seen is not expected to cause problems in most cases. 923327 Summary and evaluation of construction related damage to geotextiles in reinforcing applications Paulson, J N Proc 4th International Confereuee on Geotextiles, Geomemiwastes and Related Products, The Hague, 28 May-I June 1990 V2, P615-619. Publ Rotterdam: A A Balkema, 1990 The small amount of available data on construction related damage to geotextiles is first reviewed. Strength reduction, number of holes per unit area, and degree of severity of installation conditions show general trends but with a high degree of variability. A controlled laboratory test program has allowed refinement of these results. Soft, medium, and stiff clay subgrades, roadbase crushed stone aggregate, different lift thicknesses and compaction methods, and a variety of woven slit, needled, and stitchbonded textiles were used. 923328 Influence of weaving structure and coating on the degree of mechankal damage of reinforcing mats and woven geogrids, caused by different fills, during installation Troost, G H; Ploeg, N A Proc 4th lmtermuio~d Conference me Geotextiles, Geomembra~s mul Related Prodt~s, The Hague, 28 May-I Jtme 1990 V2, P609-614. Publ Rotterdam: A A Balkema, 1990 The effect of installation on damage and degradation of mechanical properties of a range of woven, PVC coated, and net type geosynthetics has been examined. Fill materials were sand, sandy gravel, and sharp, angular crushed basalt.
© 1992 Pergamon Press Ltd. Reproduction not permitted
Reinforced earth See also: 923123
923321 Control and laying of soil-fibre material Texsoi and its in situ characteristics (In French) Khay, M; Matichard, Y; Yoshioka, A Bull Liaison Labs Ponts Clmuesees N174, July-Aug 1991, P47-59 Two major factors influence the in situ properties of Texsol material, the constituent mixture and the method of laying. Three types of equipment for producing the intimate mixture of fibres and granular material are illustrated. Principles of control of constituents, laying and compaction are described. Current procedures of quality assessment, including test methods, are presented.
923322 Geotextiles in landfill closures Christopher, B R Geotext Geomem VIO, N5-6, 1991, 1'459-470 Each landfill generates an individual set of requirements for cover design. Geotextiles can find many applications: stabilisation of landfill surface to allow final cover construction; gas vent layer; protection of the geomembrane; friction improvement between geomembrane and cohesive soils; filter layers for soil drainage; and separation media for biotic barriers. These aspects are considered with reference to available design literature.
923323 Geogrid reinforcement in landfill closures Carroll, R G; Chouery-Curtis, V Geotext Geomem VIO, N5-6, 1991, P471-486 G-eogrids find applications in landfill closures both to maintain the stability of the soil cover layer and to support the geomembrane in the event of deformation due to subsidence or differential settlement. Minimisation of tensile stress in the geomembrane is the design aim. Case histories of each application are presented, with construction and function described in detail. Account must be taken of long term behaviour and properties of the geosynthetics.
923324 Comlmter aided design of geosynthetic reinforced soil walls. Technical note Mandal, J N; Jambale, K S lnt J Geotecit Geol Faegag V9, N2, June 1991, P139-151 Design of a reinforced earth wall in which lateral pressures are resisted by tensile forces in the strips of geosynthetics is presented. The procedure has been simplified by development of a computer program which allows for variation in length, spacing, and type of material while ensuring structural stability. Tensile forces in the reinforcement under vertical and horizontal strip loads and the effect of external load location on the failure surface are examined.
Exhumation, generally after zero service, of 75 different geosynthetics was carried out to allow assessment of amount and nature of installation damage. Percentage strength retained varied from 13-100, and number of holes per square metre from 0 to 120. There was no apparent correlation between strength loss and number of holes. Results showed coarse, angular and frozen subgrades were very damaging. Thin cover soil lifts and heavy construction machinery led to major damage. Low mass per unit area geotextiles showed greatest strength loss and number of holes. Large cover soil particles and poorly graded mixes caused problems. 923326 Site damage trials on geotextiles Watts, G R A; Brady, K C Proc 4th International Conference on Geotextiles, Geomembrnaes and Related Products, The Hague, 28 May- I June 1990 V2, P603-607. Publ Rotterdam: A ,4 Balkema, 1990 The effects of construction of a reinforced compacted fill on the reinforcing elements were examined using 3 nonwoven geotextiles and 1 geogrid with crushed limestone fill. The fill was compacted according to DTp Specifications for Highway Works. A special procedure was designed to retrieve the reinforcement for examination without inflicting further damage. Damage assessment by visual inspection generally correlated with that in terms of lowering of tensile strength and failure strain. The degree of damage seen is not expected to cause problems in most cases. 923327 Summary and evaluation of construction related damage to geotextiles in reinforcing applications Paulson, J N Proc 4th International Confereuee on Geotextiles, Geomemiwastes and Related Products, The Hague, 28 May-I June 1990 V2, P615-619. Publ Rotterdam: A A Balkema, 1990 The small amount of available data on construction related damage to geotextiles is first reviewed. Strength reduction, number of holes per unit area, and degree of severity of installation conditions show general trends but with a high degree of variability. A controlled laboratory test program has allowed refinement of these results. Soft, medium, and stiff clay subgrades, roadbase crushed stone aggregate, different lift thicknesses and compaction methods, and a variety of woven slit, needled, and stitchbonded textiles were used. 923328 Influence of weaving structure and coating on the degree of mechankal damage of reinforcing mats and woven geogrids, caused by different fills, during installation Troost, G H; Ploeg, N A Proc 4th lmtermuio~d Conference me Geotextiles, Geomembra~s mul Related Prodt~s, The Hague, 28 May-I Jtme 1990 V2, P609-614. Publ Rotterdam: A A Balkema, 1990 The effect of installation on damage and degradation of mechanical properties of a range of woven, PVC coated, and net type geosynthetics has been examined. Fill materials were sand, sandy gravel, and sharp, angular crushed basalt.
© 1992 Pergamon Press Ltd. Reproduction not permitted