Helical Piles and Anchors Hydraulically Driven Push Piers Polyurethane Injection Supplemental ...

375 Pages·2016·12.3 MB·English

Helical Piles and Anchors
Hydraulically Driven Push Piers
Polyurethane Injection
Supplemental Support Systems

FSI Technical Manual
Second Edition
July 2014
NOTICE AND DISCLAIMER
The information contained in this manual (manual) prepared by Foundation Supportworks®, Inc.
(FSI) has been written solely for general informational purposes to assist with project design and
writing specifications. While FSI believes the information in this manual is accurate as of the date
of publication, the user should not rely upon it for any specific application without examination and
verification of its accuracy and applicability by an engineer, designer, or architect licensed in the state
of the proposed project. Further, because design and application of foundation support products are
typically dependent upon site-specific project conditions, including without limitation geotechnical
properties of soil which can vary significantly between sampling points, it is up to the user, prior to
installation, to seek independent engineering analysis and to verify compliance with applicable rules
and regulations.
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IN THIS MANUAL AND SPECIFICALLY DISCLAIMS ALL WARRANTIES, INCLUDING WARRANTIES
OF EXPRESS OR IMPLIED MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND
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FSI is constantly innovating in order to stay on the leading edge of the foundation support and repair
industry and, so, it reserves the right to change or modify product design and specifications without
notice. Moreover, some of the third-party material incorporated in this manual may be modified
or amended from time to time. Please contact FSI staff to verify use of the most recent design
information and product specifications.
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Foundation Supportworks®, Inc.
12330 Cary Circle
Omaha, NE 68128
800-281-8545
www.foundationsupportworks.com
www.fsicommercial.com
www.OnStableGround.com
Technical Manual p i © 2014 Foundation Supportworks®, Inc.
Second Edition All Rights Reserved
TABLE OF CONTENTS
Notice and Disclaimer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . i
Table of Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ii
Chapter 1 – Introduction
1.1 About Foundation Supportworks®, Inc............................................ 1
1.2 FSI Engineering Roles........................................................ 2
1.3 Continuing Education Opportunities............................................. 3
Chapter 2 – Helical Foundation Systems
2.1 History.................................................................... 5
2.2 Summary Description ........................................................ 6
2.3 Helical Foundation System Components ......................................... 7
2.3.1 Helix Plates .......................................................... 7
2.3.2 Central Shaft ......................................................... 9
2.3.2.1 Coupler Detail .................................................. 9
2.3.2.2 Round vs. Square............................................... 13
2.3.3 Brackets............................................................ 14
2.4 Benefits.................................................................. 17
2.5 Limitations................................................................ 18
2.6 Design Considerations ...................................................... 20
2.6.1 Spacing and Depth ................................................... 20
2.6.2 New Construction vs. Retrofit ........................................... 21
2.7 Helical Bearing Capacity Design Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
2.7.1 Individual Bearing Method.............................................. 24
2.7.1.1 Critical Depth ................................................. 25
2.7.2 Cylindrical Shear Method............................................... 26
2.7.3 Torque Correlation Method ............................................. 27
2.8 Helical Tiebacks ........................................................... 29
2.8.1 Design Considerations ................................................ 30
2.9 Helical Soil Nails ........................................................... 33
2.9.1 Construction Methodology.............................................. 34
2.9.2 Design Considerations................................................. 35
2.9.2.1 Temporary and Permanent Wall Facing .............................. 39
2.9.2.2 Limit States ................................................... 39
2.10 Load Tests................................................................ 40
2.11 Design Examples........................................................... 41
2.11.1 Helical Piles ......................................................... 41
2.11.2 Helical Tiebacks...................................................... 44
Technical Manual p ii © 2014 Foundation Supportworks®, Inc.
Second Edition All Rights Reserved
2.12 Installation................................................................ 45
2.12.1 General Information................................................... 45
2.12.1.1 Preparation................................................... 45
2.12.1.2 Crowd....................................................... 46
2.12.1.3 Penetration Rate............................................... 46
2.12.2 Equipment .......................................................... 47
2.12.2.1 Drive Heads .................................................. 47
2.12.2.2 Installation Tooling ............................................. 49
2.12.2.3 Monitoring Torque ............................................. 50
2.12.3 Installation Guidelines ................................................. 52
2.12.3.1 New Construction.............................................. 52
2.12.3.2 Retrofit Helical Piers............................................ 54
2.12.3.3 Helical Tiebacks............................................... 57
Appendix 2A – Helical Product Ratings, Properties and Details .......................... 59
Appendix 2B – Lift Assembly Specifications ........................................ 111
Appendix 2C – HelixPro® Helical Foundation Design Software for Professionals ............ 117
Appendix 2D – Pile Bucking Considerations ........................................ 123
Appendix 2E – Corrosion Considerations .......................................... 129
Appendix 2F – Model Specifications .............................................. 135
Helical Pile Foundations – Compression Applications.............................. 137
Helical Anchor Foundations – Tension Applications ............................... 153
Helical Soil Nails – Earth Retention Applications.................................. 171
Appendix 2G – Guidelines and Recommendations ................................... 187
Geotechnical Investigation Guidelines ......................................... 189
Preliminary Design Services ................................................. 195
Preliminary Design Request Form............................................. 197
Load Test Policy .......................................................... 199
Appendix 2H – Documentation .................................................. 203
ICC-ES Evaluation Report ESR-3074 .......................................... 205
Evaluation Report CCMC 13556-R ............................................ 215
References ................................................................. 219
Technical Manual p iii © 2014 Foundation Supportworks®, Inc.
Second Edition All Rights Reserved
Chapter 3 – Hydraulically-Driven Push Piers
3.1 History.................................................................. 221
3.2 Summary Description ...................................................... 223
3.2.1 Applications........................................................ 223
3.3 Push Pier System Components............................................... 224
3.3.1 Bracket Assemblies.................................................. 224
3.3.1.1 Eccentric Loading............................................. 224
3.3.1.2 External Sleeve............................................... 225
3.3.2 Starter Tube........................................................ 226
3.3.2.1 Friction Reduction Collar ....................................... 227
3.3.3 Pier Tube .......................................................... 227
3.3.3.1 Coupling.................................................... 227
3.4 Foundation and Slab Push Pier Bracket Assemblies............................... 228
3.5 Benefits................................................................. 229
3.6 Limitations............................................................... 229
3.7 Corrosion Protection....................................................... 230
3.8 Push Pier Installation Equipment.............................................. 230
3.8.1 Drive and Lift Cylinders ............................................... 231
3.8.2 Hydraulic Pumps .................................................... 231
3.8.2.1 FSI Gasoline Powered Hydraulic Pumps ........................... 232
3.8.2.2 FSI Electric Powered Hydraulic Pumps ............................ 232
3.8.3 Remote Valve Assembly............................................... 233
3.8.4 Hoses and Fittings................................................... 233
3.8.5 Drive Stands ....................................................... 233
3.8.6 Lift Cylinder Assemblies............................................... 233
3.9 Push Pier Capacity and Spacing.............................................. 234
3.9.1 Factor of Safety ...................................................... 235
3.9.2 Bolting the Under-Footing Bracket to the Foundation ......................... 235
3.10 Under-Footing Push Pier Installation........................................... 236
3.11 PP288 Flush-Mount Push Pier Installation ...................................... 245
3.12 PP288 Slab Push Pier Installation............................................. 245
3.13 Push Pier Load Testing ..................................................... 251

Appendix 3A – Bracket Capacities and Specifications ................................ 253
Appendix 3B – Drive Stand Specifications.......................................... 263
Appendix 3C – Lift Assembly Specifications ........................................ 271
Appendix 3D – Model Specification – Hydraulically-Driven Push Pier Systems.............. 277
Technical Manual p iv © 2014 Foundation Supportworks®, Inc.
Second Edition All Rights Reserved
Chapter 4 – Miscellaneous Structural Support Products
4.1 Introduction............................................................... 291
4.2 Geo-Lock® Wall Anchor System............................................... 291
4.2.1 Summary Description.................................................. 291
4.2.1.1 Advantages .................................................. 291
4.2.2 Design Theory ....................................................... 292
4.2.3 Why It Works ........................................................ 294
4.2.4 Installation Guidelines ................................................. 294
4.2.4.1 Spacing ..................................................... 294
4.2.4.2 Torque Recommendations....................................... 294
4.2.4.3 Depth and Location of Earth Anchor ............................... 295
4.2.5 Installation Steps ..................................................... 298
4.2.5.1 Solutions for Extreme Wall Problems............................... 299
4.2.5.2 Hide-A-Way® Wall Anchor Cover .................................. 301
4.3 PowerBrace™ System....................................................... 302
4.3.1 Summary Description.................................................. 302
4.3.2 Installation Steps ..................................................... 302
4.4 CarbonArmor® Wall Reinforcing System......................................... 304
4.4.1 Summary Description.................................................. 304
4.4.1.1 Advantages .................................................. 305
4.4.2 Installation Steps ..................................................... 305
4.4.2.1 ArmorLock™ System............................................ 306
4.4.2.2 Special Installation Considerations ................................ 307
4.5 SmartJack® System ........................................................ 308
4.5.1 Summary Description.................................................. 308
4.5.1.1 Advantages .................................................. 308
4.5.2 Installation Steps ..................................................... 309
Appendix 4A – Geo-Lock® Wall Anchor System ..................................... 311
Technical Specifications .................................................... 313
Appendix 4B – PowerBrace™ System ............................................. 315
Technical Specifications and Spacing Guidelines................................. 317
Appendix 4C – CarbonArmor® Wall Reinforcing System ............................... 319
Technical Specifications and Spacing Recommendations .......................... 321
Appendix 4D – SmartJack® Systems.............................................. 323
Model 288 Technical Specifications and Design Guide............................. 325
Model 350 Technical Specifications and Design Guide............................. 329
Technical Manual p v © 2014 Foundation Supportworks®, Inc.
Second Edition All Rights Reserved
Chapter 5 – PolyLEVEL® Polyurethane Foam and Resin
5.1 Summary Description ...................................................... 333
5.2 Applications ............................................................. 334
5.3 Benefits................................................................. 336
5.4 Product Use Considerations................................................. 337
5.5 Products ................................................................ 337
5.6 Equipment............................................................... 338
5.7 Installation Steps.......................................................... 338
Appendix 5A – Technical Information.............................................. 341
PolyLEVEL® 100-SS ....................................................... 343
PolyLEVEL® 250 .......................................................... 345
PolyLEVEL® 400 .......................................................... 347
PolyLEVEL® 400H ......................................................... 349
PolyLEVEL® Trench-Breaker ................................................. 351
Appendix 5B – Model Specifications.............................................. 353
Polyurethane Void Filling or Soil Stabilization Applications.......................... 355
Polyurethane Installation for Concrete Pavement/Slab Stabilization Applications ........ 359
Supplemental information for products and systems not published in this manual can be found
on the Foundation Supportworks®, Inc. commercial website, www.OnStableGround.com.
Technical Manual p vi © 2014 Foundation Supportworks®, Inc.
Second Edition All Rights Reserved