The use of tiebacks has evolved from simple lateral support during construction or excavation, to an increased number of permanent installations. This book examines the process of choosing the right tie-back or anchor for the job and the varying factors that influence those decisions from concept to construction, including corrosion, long-term capacity and soil conditions.
Preface
1. Introduction
2. Design
2.1 Anchors
2.2 Tendons
2.3 Factors of safety
2.4 Testing
3. Construction
3.1 Tiebacks with straight-shaft anchors made without grout pressure
3.2 Tiebacks with shaft anchors made with pressure grout
3.3 Regrouted anchors
3.4 Tendons
3.5 Corrosion protection
4. Testing
4.1 The proof test
4.2 The performance test
4.3 Anchor strain
4.4 Creep
4.5 The test program
4.6 Testing program modifications
4.7 Conclusion
5. Contracting Procedures
5.1 The normal American contracting procedure
5.2 European contracting procedures
5.3 American public work procedures
5.4 Summary of first five chapters
6. Tieback Materials
6.1 Tendons
6.2 Tendon-structure connections
6.3 Anchors
6.4 Bond breakers
6.5 Regrouting
7. Corrosion Protection
7.1 Evaluating corrosion
7.2 Protecting tendons by encapsulation
7.3 Anchor deterioration
7.4 Corrosion potential in the unbonded length
7.5 Protecting the connection to the structures
7.6 Tendon steels
8. More on Testing
8.1 Characteristic load/deformation curves
8.2 The hollow-stem-auger tieback
8.3 Regroutable tiebacks
8.4 Load errors during tieback testing
8.5 Measurement errors during tieback testing
8.6 Creep
8.7 Preconstruction tieback testing
8.8 Tests to verify longer-term tieback performances
8.9 Conclusion
9. Uplift
9.1 Water pressure on concrete tanks
9.2 Building slabs
9.3 Tiedowns to strengthen dams
9.4 Tower uplift
9.5 Summary
10. Tiedback Walls
10.1 The wall type affects the earth pressure
10.2 Types of walls
10.3 Earth pressure
10.4 Wall design
10.5 Design of individual tiebacks
10.6 Tests to verify capacity of individual tracks
10.7 Tests to verify adequacy of calculated tieback capacity
10.8 Summary
11. Landslides, Walls and Tiebacks
11.1 Classification of landslides
11.2 Landslide analysis
11.3 Wall and tieback design
11.4 Summary
11.5 Conclusion
Biography
Harry W. Schnabel
