Ground anchorages and anchored structures in service

Contents
Keynote presentation
Maintenance testing and service behaviour monitoring of
permanent ground anchorages
Stuart Littlejohn and Devon Mothersille i
Session one: Inspection procedures and physical
conditions recorded in service
A case study of inspection, integrity investigation and repair of
anchors used to stabilise slopes around dam lake
Minoru Okuno and Takahiro Takemata 1
Inspection of anchorages supporting waterside structures
Devon Mothersille and Tony Barley 12
Inspection , integrity investigation and repair of 30-year-old
anchors
Yukio Fuseya and Hiroyuki Takeda 23
Performance and condition assessment of 30-year-old
anchorages, River Clyde, Glasgow
Devon Mothersille, Stuart Jackman and Jim Ferrier 33
Some examples of the poor installation of electricity isolated
prestressed ground anchors in Slovenia
Iztok Klemenc and Viljem Kuhar 43
Maintenance control of ground anchors constructed in
Japanese Expressways
Masahiro Yoshimura, Masaru Takemoto and
Kiyoyuki Amano 53
Session two: Service behaviour monitoring procedures
and performance in service
Long term monitoring and routine maintenance of ground
anchorages at Devonport Royal Dockyard, Plymouth UK
Michael Whitworth and Steve Parrish 63
The long-term performance of permanent ground anchors
forming part of the Thames Barrier project
Mike Turner and David Richards 72
25 years of monitoring of rock anchors installed for landslide
stabilisation at Nantgarw, South Africa
Hugo Wood and Peter Martin 82
Anchored slope monitoring and test for periodic inspection in
Japanese Expressways
Katsumi Okubo, Masaru Takemoto and Hiroshi Yamada 92
Monitoring of multi-strand ground anchors at the City of
Manchester stadium
Lee Jordan 92
Repeated lift-off testing of single bore multiple anchors for
dam retaining wall over a 5 year period
Mary Ellen Bruce, Jesùs Gomez and Robert Taylor 111
Session three: North American Dam rehabilitation
Rock anchors for North American dams: the national research
program bibliography and database
Donald Bruce and John Wolfhope 121
Post-tensioned rehabilitation applied to hydropower dams:
continuously improving on an anchor program
John Woldhope, Donald Bruce, Gregor Forbes
and Leslie Boyd 132
Case histories of high capacity anchors for two dams in
Canada involving long term monitoring
Horst Aschenbroich 144
The stabilization of Gilboa Dam, New York using high
capacity rock anchors: addressing service performance
issues
Kessi Zicko, Donald Bruce and Robert Kline 155
The performance of Pacoima Dam in two major earthquakes,
with and without post-tensioned anchors
Mark Schultz, Shawn Jones and Jeff Howard 166
Session four: Rock bolts in tunnels and mines
A review of glass reinforced polymer (GFRP) tendon for rock
bolting in tunnels
Alison Littlejohn 177
Design and construction of large rock caverns supported by
ground anchorages
Kenji Aoki 188
Monitoring and testing of mine anchor systems: cases studies
and applications to the civil industry
Peter Altounyan, David Bigby and Lorraine Kent 199
Session five: Non-destructive integrity testing
Common anchorage issues addressed by numerical modelling
Ana Ivanovi?, Richard Neilson, Andrew Starkey and
Albert Rodger 209
Non-destructive testing of deep mine anchorages
Andrew Starkey, Richard Neilson, Ana Ivanovi? and
Albert Rodger 220
Ultrasonic technique for rock bolt and rock mass bond quality
control
Takayuki Mori, Makoto Nakajima and Tohru Tsutsui 231
The development of the method of detecting the anchor tensile
force to impact elastic wave
Kuniyasu Tanaka, Hidenobu Okada and Masayasu Izakura 238
Development of loading apparatus and test procedure of rapid
load test for ground anchors
Tatsuro Sueyoshi and Kazuo Tani 250
Session six: Corrosion monitoring and corrosion
protection systems
Durability of buried and encased ground anchorages and
structural components; requirements for corrosivity
assessment and protection to ensure service life
Gareth John and Stuart Littlejohn 263
Application of linear polarisation resistance measurements
and systems modelling for corrosion assessment of high
strength rock anchorages
Gareth John and Petra Ernst 273
Corrosion protection options for permanent ground anchorages
Chris Irvin and Devon Mothersille 283
Replenishment of underhead protection (below bearing plate)
Kouichi Suga, Akira Yonemura and Yoshio Iwaida 293
Durability of ground anchors and other geotechnical
stabilization applications in concrete reinforcement steel
quality subject to new European regulations
Dieter Jungwirth and Susanne Adler 302
A case study on corrosion protection effect of using field-
mixed resin as tie-back anchors’ grout material for
retaining wall and its inspection method
Chihping Kuo and Hung-Jiun Liao 312
Advancements in ground anchors: carbon fibre reinforced
polymer (CFRP) strands
Matthew Sentry, Abdelmalek Bouazza, Riadh al-Mahaidi
Darren Loidl, Chris Bluff and Len Carrigan 321
Ground anchor tendons in carbon fibre-reinforced polymers
Tony Barley and John Hartley 331
Ground anchor made of new materials applicable for highly
corrosive environments
Tsuyoshi Enomoto, Toshio Sugisaki, Kouichi Suga and
Tatsuro Sueyoshi 341
New development of low relaxation epoxy coated strand
Tiger Kido, Takayuki Yamagiwa, Toshihiko Niki and
Yoshihiko Touda 351
Session seven: Case histories of satisfactory
performance, shortcomings and failures in service
Assessment of cement grout cover as sole protection of
permanent tensioned steel tendons
Stuart Littlejohn 357
The failure of anchorage B160 at Devonport Royal
Dockyard, Plymouth; reasons for failure and lessons
learnt
Michael Whitworth and Steve Parrish 368
Service performance of multiple anchors in difficult ground
conditions for both permanent anchors and temporary
removable anchor usage
Tony Barley and Mark Edwards 380
Investigation of the failure of permanent anchorages adjacent
to a tidal surge barrier
Tony Barley, Devon Mothersille and Peter Chamley 387
Reliability-based failure probability and resistance factor for
flush-drilled anchors in Taipei Basin
Hung-Jiun Liao, Jianye Ching and Chia-Wei Sue 397
Field surveys of anchored slopes after 2004 Niigataken
Chuetsu earthquake
Jiro Takemura, Hiroaki Kubo and Junichi Yamazaki 407
Rehabilitation of a failing anchored retaining wall
Thomas Richards and Daniel Thome 417
Predicted and observed performance of an anchored retaining
wall in granite
Abid Adekunte, Douglas Madsen, Neil Margetson and
Liam Quinn 427
The design, installation & monitoring of high capacity
antiflotation bar anchors to restrain deep basements in
Dublin
Jim Martin, Philip Daynes, Cathal McDonnell and
Martin Pedley 438
Session eight: Recommendations and standards for
inspection, monitoring and repair
A new manual for ground anchor inspection, integrity
Investigation and remedial measures
Hiroaki Miyatake, Takeshi Oshita, Hiroaki Kubo and
Mitsunari Takeyama 451
Structural integrity and durability of ground anchors-general
programme of research in Japan
Junichi Yamazaki, Tatsuro Sueyoshi and Nobuyuki Urakawa 461
Engineering assessment of the grease-filled annulus of
sheathed prestressing strand for use in permanent
ground anchorages
Tony Barley and Devon Mothersille 471
Rock anchors for Norm America dams: the development of the
national recommendations (1974-2004)
Donald Bruce and John Wolfhope 481
Author Index 493
Discussions
Session one: Inspection procedures and physical conditions
recorded in service 495
Session two: Services behaviour and monitoring procedure
and performance in service 511
Session three: North American Dam rehabilitation 518
Session four: Rock bolts in tunnels and mines 525
Session five: Non-destructive integrity testing 530
Session six: Corrosion monitoring and corrosion 544
Session seven: Case histories of satisfactory performance,
shortcomings and failures in service 571
Session eight: Recommendations and standards for inspection,
monitoring and repair 587