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Practice makes perfect
REINFORCEMENT:SOIL 967218 Cuttings cost H. Russell, New Civil Engineer (NCE), 1165, 1996, pp xvixvii. This short article discusses the use of reinforced soil for cuttings along 6 km of motorway between junctions 6 and 8 of the M25 around London. The project involved the widening of the motorway from 3 to 4 lanes, within the existing boundaries of the motorway. The use of reinforced soil meant considerable cost savings. The design criteria for the project and details of the Textomur system which was used are reviewed. (C.Paice) 967211 Walls have years ... . Wheeler, New Civil Engineer (NCE),
STABI~ISATI~N
314A
967216
Earth bound P. Wheeler, New Civil Engineer (NCE,I, 1165, 1996, pp iv-v. This short article assesses the advantages, applications of reinforced soil and the UK standard BS8006. Manufacturers claim that soil structures offer saving of up to 80% compared to reinforced concrete alternatives, while consultants usually suggest a more conservative 30%-40% saving. The physical processes involved in making reinforced soil work are discussed and the limit state approach included in BS8006, ‘code of practice for strengthened/re~~fo~~d soils and other fills’, is reviewed. (CPaice)
1165, 1996, pp
XllI,XV.
This short article discusses the use of reinforced soil walls to resolve soft ground problems for the UK Reading A33 relief road. It was decided that reinforced soil was commercially most advantageous over the use of sheet piles or concrete walls. for a 6 m retaining wall. The reinforced soil structure can accept more settlement than a reinforced concrete structure and also distribute ground bearing pressure more evenly giving less demanding foundation requirements. (C.Paice) 967212 Pin down policy ANON, New Civil Engineer (NCE), 1165, 1996, pp xviii-xix. This short article reports on the use of reinforced soil to prevent landslides in Ironbridge gorge on the River Severn, UK. The use of geosynthetics and soil nails at two major projects in the area is discussed. The soil structures are designed to BS8006 and are sufficiently rigid to accommodate differential movements, but have the ability to deform rather than shear if local movements become excessive. (C.Paice) 967213 Barrier limit _4NON, New Civil Engineer (NCE), 1165, 1996, p xx. This short article reviews the use of site won Gault Clay and crushed concrete which have been used to form a selfsustaining reinforced soil environmental bund in an area of outstanding natural beauty below the UK’s Surrey, North Downs. The bund is 5 m high, 150 m long and has an overall slope face of 60 degrees. The design meets requirements of council planners who want to limit the noise and visual impact of the Redland Tiles Moorhouse works alongside. (C.Paice) 967214 Holding up the pack
ANON, New Civil Engineer (NCE), 1165, 1996, p xxiii. This short article discusses the use of a novel combination of gabions and reinforced soil to retain up to 4 m of till over an existing slope for the car park of Huddersfleld’s new football and rugby league stadium in the UK. The gabion face unit and soil reinforcement are made of a single continuous mesh panel. (CPaice)
967215 Practice makes perfect Q. Leiper, New Civil Engineer (NCE), 1165, 1996, pp xxixxxx. As a code of practice, the new UK standard BS8006 for strengthened/reinforced soils and other tills embodies the experience of engineers engaged in the design and construction of these structures. The code contains material for the information and guidance of engineers together with recommendations on good practice. The author gives views on use of the code and the long term maintenance requirements of vegetated reinforced soils. (from Author)
967217
Lime migration studies in marine clays G. Rajasekaran $ S. N. Rao, Ocean ~~~i~ee~~~~, 23(4), 1996, pp 325-355. A test programme was carried out to study the migration of lime into marine clay from installed lime columns and lime slurry injected points. Results indicate that a sufficient amount of lime is diffused into the soil systcm~ with time and the presence of excessive sodium ions in sea water does not retard the effective penetration of lime into the soil. It is suggested that both lime-column and lime-injection tecbniques can be conveniently used ta improve the behaviour of soft marine clayey deposits. For weak marine clays under large depths of water, the lime-injection hec suited. (from Authors) 967218
Engineering and environmental aspects af cutback asphalt (MC-70) stabilization of swe ible soils Cd A. S. Al-Homoud, T. Khe A Al-Ajlouni, Environmental 81Engineering 1995, pp 497e, 1 506. The objective of this research was to i~ves~gate the effectiveness of Cutback Asphalt (MC-70) as a soil stabilizing agent. For this purpose, four different soils from Northern Jordan, which exhibit certain engineering swelling and collapsibility, were selected. showed that Cutback Asphalt (M stabilizing the tested soils. A gener comparison of the effectiveness and economic feasibility of Cutback Asphalt (MC-70) to lime and cement, as st~bili~~~ agents for reduction of swell potential of soils containing a high percentage of tines showed that Cutback Asphalt (MC-70) causes higher reduction in swell potential than cement and a lower reduction than lime. However, the Asphalt was found to be the least economical agent. However there are cases where lime or cement can have problems which can be resolved by the use of this Aspha!t. (from Authors) 967219
Special ground improvement rnetbQ~s~ ~~~n~~ improves ments associated with the Trans-Tok K. Uchida, Y. Iida, Y. Yoshida Georesources & Geotechnology, 14(13, pp 41-63. The Trans-Tokyo Bay Highway eomp~ses the Ukishima
access, two artificial islands, at Kisarazu and Kawasaki, a shield tunnel, and a bridge. The ground along the route is soft clay or loose seabed mud, so various ground improvement works had to be carried out before the construction of largescale structures could be commenced. This report describes how the sand compaction pile method, the slurry mixture cement treatment method, the dry mixture cement treatment method, and the deep mixing method were used for ground stability and improvement. (Arbors)
STABI~ISATI~N
314A
967216
Earth bound P. Wheeler, New Civil Engineer (NCE,I, 1165, 1996, pp iv-v. This short article assesses the advantages, applications of reinforced soil and the UK standard BS8006. Manufacturers claim that soil structures offer saving of up to 80% compared to reinforced concrete alternatives, while consultants usually suggest a more conservative 30%-40% saving. The physical processes involved in making reinforced soil work are discussed and the limit state approach included in BS8006, ‘code of practice for strengthened/re~~fo~~d soils and other fills’, is reviewed. (CPaice)
1165, 1996, pp
XllI,XV.
This short article discusses the use of reinforced soil walls to resolve soft ground problems for the UK Reading A33 relief road. It was decided that reinforced soil was commercially most advantageous over the use of sheet piles or concrete walls. for a 6 m retaining wall. The reinforced soil structure can accept more settlement than a reinforced concrete structure and also distribute ground bearing pressure more evenly giving less demanding foundation requirements. (C.Paice) 967212 Pin down policy ANON, New Civil Engineer (NCE), 1165, 1996, pp xviii-xix. This short article reports on the use of reinforced soil to prevent landslides in Ironbridge gorge on the River Severn, UK. The use of geosynthetics and soil nails at two major projects in the area is discussed. The soil structures are designed to BS8006 and are sufficiently rigid to accommodate differential movements, but have the ability to deform rather than shear if local movements become excessive. (C.Paice) 967213 Barrier limit _4NON, New Civil Engineer (NCE), 1165, 1996, p xx. This short article reviews the use of site won Gault Clay and crushed concrete which have been used to form a selfsustaining reinforced soil environmental bund in an area of outstanding natural beauty below the UK’s Surrey, North Downs. The bund is 5 m high, 150 m long and has an overall slope face of 60 degrees. The design meets requirements of council planners who want to limit the noise and visual impact of the Redland Tiles Moorhouse works alongside. (C.Paice) 967214 Holding up the pack
ANON, New Civil Engineer (NCE), 1165, 1996, p xxiii. This short article discusses the use of a novel combination of gabions and reinforced soil to retain up to 4 m of till over an existing slope for the car park of Huddersfleld’s new football and rugby league stadium in the UK. The gabion face unit and soil reinforcement are made of a single continuous mesh panel. (CPaice)
967215 Practice makes perfect Q. Leiper, New Civil Engineer (NCE), 1165, 1996, pp xxixxxx. As a code of practice, the new UK standard BS8006 for strengthened/reinforced soils and other tills embodies the experience of engineers engaged in the design and construction of these structures. The code contains material for the information and guidance of engineers together with recommendations on good practice. The author gives views on use of the code and the long term maintenance requirements of vegetated reinforced soils. (from Author)
967217
Lime migration studies in marine clays G. Rajasekaran $ S. N. Rao, Ocean ~~~i~ee~~~~, 23(4), 1996, pp 325-355. A test programme was carried out to study the migration of lime into marine clay from installed lime columns and lime slurry injected points. Results indicate that a sufficient amount of lime is diffused into the soil systcm~ with time and the presence of excessive sodium ions in sea water does not retard the effective penetration of lime into the soil. It is suggested that both lime-column and lime-injection tecbniques can be conveniently used ta improve the behaviour of soft marine clayey deposits. For weak marine clays under large depths of water, the lime-injection hec suited. (from Authors) 967218
Engineering and environmental aspects af cutback asphalt (MC-70) stabilization of swe ible soils Cd A. S. Al-Homoud, T. Khe A Al-Ajlouni, Environmental 81Engineering 1995, pp 497e, 1 506. The objective of this research was to i~ves~gate the effectiveness of Cutback Asphalt (MC-70) as a soil stabilizing agent. For this purpose, four different soils from Northern Jordan, which exhibit certain engineering swelling and collapsibility, were selected. showed that Cutback Asphalt (M stabilizing the tested soils. A gener comparison of the effectiveness and economic feasibility of Cutback Asphalt (MC-70) to lime and cement, as st~bili~~~ agents for reduction of swell potential of soils containing a high percentage of tines showed that Cutback Asphalt (MC-70) causes higher reduction in swell potential than cement and a lower reduction than lime. However, the Asphalt was found to be the least economical agent. However there are cases where lime or cement can have problems which can be resolved by the use of this Aspha!t. (from Authors) 967219
Special ground improvement rnetbQ~s~ ~~~n~~ improves ments associated with the Trans-Tok K. Uchida, Y. Iida, Y. Yoshida Georesources & Geotechnology, 14(13, pp 41-63. The Trans-Tokyo Bay Highway eomp~ses the Ukishima
access, two artificial islands, at Kisarazu and Kawasaki, a shield tunnel, and a bridge. The ground along the route is soft clay or loose seabed mud, so various ground improvement works had to be carried out before the construction of largescale structures could be commenced. This report describes how the sand compaction pile method, the slurry mixture cement treatment method, the dry mixture cement treatment method, and the deep mixing method were used for ground stability and improvement. (Arbors)