Passive Force-Displacement Relationships for Skewed Abutments

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General Information
Study Number: TPF-5(264)
Lead Organization: Utah Department of Transportation
Contract Start Date: Aug 13, 2012
Solicitation Number: 1312
Partners: CA, FHWA, MN, MT, NY, OR, UT, WI
Contractor(s): Brigham Young University
Status: Contract signed
Est. Completion Date: Jul 31, 2021
Contract/Other Number: 13-8123
Last Updated: Oct 29, 2021
Contract End Date: Jul 31, 2021
Financial Summary
Contract Amount: $400,000.00
Total Commitments Received: $400,000.00
100% SP&R Approval: Approved
Contact Information
Lead Study Contact(s): David Stevens
davidstevens@utah.gov
Phone: 801-589-8340
FHWA Technical Liaison(s): Jennifer Nicks
jennifer.nicks@dot.gov
Phone: 202- 493-3075
Organization Year Commitments Technical Contact Name Funding Contact Name Contact Number Email Address
California Department of Transportation 2013 $50,000.00 Charles Sikorsky Sang Le 916-227-0701 sang.le@dot.ca.gov
California Department of Transportation 2016 $100,000.00 Charles Sikorsky Sang Le 916-227-0701 sang.le@dot.ca.gov
Federal Highway Administration 2013 $25,000.00 Jennifer Nicks Jack Jernigan 202-493-3363 Jack.Jernigan@dot.gov
Minnesota Department of Transportation 2012 $15,000.00 Dave Conkel Lisa Jansen 651-366-3779 lisa.jansen@state.mn.us
Minnesota Department of Transportation 2013 $15,000.00 Dave Conkel Lisa Jansen 651-366-3779 lisa.jansen@state.mn.us
Montana Department of Transportation 2012 $15,000.00 Stephanie Brandenberger Susan Sillick 406-444-7693 ssillick@mt.gov
Montana Department of Transportation 2013 $15,000.00 Stephanie Brandenberger Susan Sillick 406-444-7693 ssillick@mt.gov
New York State Department of Transportation 2012 $20,000.00 Steve Conklin Wes Yang 518-457-4660 wes.yang@dot.ny.gov
New York State Department of Transportation 2013 $20,000.00 Steve Conklin Wes Yang 518-457-4660 wes.yang@dot.ny.gov
Oregon Department of Transportation 2011 $0.00 Susan Ortiz Michael Bufalino 503-986-2845 Michael.Bufalino@odot.state.or.us
Oregon Department of Transportation 2012 $15,000.00 Susan Ortiz Michael Bufalino 503-986-2845 Michael.Bufalino@odot.state.or.us
Oregon Department of Transportation 2013 $15,000.00 Susan Ortiz Michael Bufalino 503-986-2845 Michael.Bufalino@odot.state.or.us
Utah Department of Transportation 2012 $30,000.00 Darin Sjoblom David Stevens 801-589-8340 davidstevens@utah.gov
Utah Department of Transportation 2013 $20,000.00 Darin Sjoblom David Stevens 801-589-8340 davidstevens@utah.gov
Utah Department of Transportation 2016 $15,000.00 Darin Sjoblom David Stevens 801-589-8340 davidstevens@utah.gov
Wisconsin Department of Transportation 2014 $15,000.00 James Luebke Ethan Severson 608-266-1457 ethanp.severson@dot.wi.gov
Wisconsin Department of Transportation 2015 $0.00 James Luebke Ethan Severson 608-266-1457 ethanp.severson@dot.wi.gov
Wisconsin Department of Transportation 2016 $15,000.00 James Luebke Ethan Severson 608-266-1457 ethanp.severson@dot.wi.gov

Study Description

Passive force-displacement relationships have been developed based on lateral load tests on pile caps/abutments aligned perpendicular to the soil backfill. However, many bridge abutments are constructed at a skew relative to the backfill. The orientation of the skew appears to cause the abutment to slide past the backfill and leads to torsion on the bent. This becomes an important consideration for integral abutments subject to thermal expansion. In addition, post-earthquake reconnaissance studies in Chile and numerical analysis suggest that bridges with skewed abutments are likely to experience more damage in seismic events. No large scale tests have been performed on skewed abutments to this point to help designers better analyze this behavior, but limited small scale tests and computer analyses indicate that the ultimate passive force may decrease as skew angle increases. No design procedures are currently available to define how the passive resistance would change for variations in skew angle. This research study would conduct large scale field tests to evaluate the effect of abutment skew on passive force.

Regarding Phase II: Controlled Low-Strength Materials (CLSM) (a.k.a. flowable fill, cellular concrete, etc.) are increasingly being used as backfill materials instead of compacted granular fills due to their ease of placement. Although CLSM backfill can accelerate the bridge construction process, there is currently no basis for selecting design parameters for this material. Some study partners requested research field testing of CLSM as abutment backfill to better understand passive resistance, with and without skew, and seismic performance.

Objectives

Objectives for Phase I of this study include:

1. Determine passive force-displacement curves for skewed abutments with and without wingwalls from large scale tests.

2. Provide comparisons of behavior of skewed abutments with that of normal abutments.

3. Evaluate the effect of wingwalls on response.

4. Develop design procedures for calculating passive force-displacement curves for skewed abutments.

Objectives for Phase II of this study include:

1. Define bridge abutment passive force-deflection relationships for CLSM backfill from large-scale testing.

2. Determine the influence of skew angle on the resistance of CLSM backfills.

3. Determine the effect of rotation during passive force development and the reduction in passive force for skewed abutments.

4. Develop design procedures to account for the observed passive force-deflection relationships for CLSM backfills.

5. Investigate the effect of rotation on passive force reduction factors defined previously for longitudinal loading only.

Scope of Work

Phase I tasks for this study include:

I-1. Perform literature review to collect available data and analysis regarding skewed abutment performance.

I-2. Perform laboratory passive force-deflection tests on 2 ft high wall with skew angles of 0º, 15º, 30º and 45º.

I-3. Perform field passive force-deflection tests on 5.5 ft high abutment with skew angles of 0º, 15º, and 30º and transverse wingwalls.

I-4. Perform field passive force-deflection tests on 5.5 ft high abutment with skew angles of 0º, 15º, 30º and MSE wingwalls.

I-5. Calibrate computer model to results of physical model tests and conduct parametric studies.

I-6. Prepare a final report that documents the entire research effort and disseminate results.

(Tasks 7 - 12 added April 2013)

I-7. Perform additional field passive force-deflection tests on 5.5 ft high abutment with a skew angle of 45º with and without MSE wingwalls.

I-8. Perform field passive force-deflection tests on 3.0 ft high unconfined backfill with skew angles of 0º and 30º.

I-9. Perform field passive force-deflection tests on 5.5 ft high pile cap with concrete wingwalls and skew angles of 0º and 45º.

I-10. Perform field passive force-deflection tests on 3.5 ft high unconfined gravel backfill with skew angles of 0º and 30º.

I-11. Perform field passive force-deflection tests on 3.5 ft high GRS gravel backfill with skew angles of 0º and 30º.

I-12. Present the results of the study at TRB and AASHTO meetings.

Phase II tasks for this study include: (added July 2016)

II-1. Conduct literature review to define typical characteristics of CLSM backfill

II-2. Perform lab-scale passive force test with CLSM

II-3. Conduct large-scale passive force field tests with CLSM

II-4. Perform large-scale passive force tests with rotation and longitudinal displacement

II-5. Validate or calibrate computer models

II-6. Develop simplified design models to simulate observed performance

II-7. Prepare final report with design examples for typical cases

II-8. Disseminate results and work with sponsors and AASHTO to implement findings into future codes

Comments

The Principal Investigator for this study will be Dr. Kyle Rollins of Brigham Young University. Dr. Rollins has extensive experience with lateral passive force tests on abutments and pile caps. He has been the Principal Investigator on previous passive force pooled fund studies led by the Utah Department of Transportation. In addition he has a 6 ft high pile cap in the field which can be adapted to skewed abutment testing with MSE wing walls.

Lab testing is planned to begin in the spring of 2012, followed by conducting of field tests and other project tasks.

The minimum partner commitment expected is $20,000.

Documents Attached
Title File/Link Type Privacy Download
Acceptance Memo Signed Acceptance Memo.PDF Memorandum Public
2012 2nd Quarter 2012 2nd quarterly report_TPF-5(264).docx Quarterly Progress Report Public
2012 3rd Quarter 2012 3rd quarterly report_TPF-5(264).docx Quarterly Progress Report Public
2012 4th Quarter 2012 4th quarterly report_TPF-5(264).docx Quarterly Progress Report Public
2013 1st Quarter 2013 1st quarterly report_TPF-5(264).docx Quarterly Progress Report Public
2013 2nd Quarter 2013 2nd quarterly report_TPF-5(264).docx Quarterly Progress Report Public
2013 3rd Quarter 2013 3rd quarterly report_TPF-5(264).docx Quarterly Progress Report Public
2013 4th Quarter 2013 4th quarterly report_TPF-5(264).docx Quarterly Progress Report Public
2014 1st Quarter 2014 1st quarterly report_TPF-5(264).docx Quarterly Progress Report Public
2014 2nd Quarter 2014 2nd quarterly report_TPF-5(264).docx Quarterly Progress Report Public
2014 3rd Quarter 2014 3rd quarterly report_TPF-5(264).docx Quarterly Progress Report Public
2014 4th Quarter 2014 4th quarterly report_TPF-5(264).docx Quarterly Progress Report Public
2015 1st Quarter 2015 1st quarterly report_TPF-5(264).docx Quarterly Progress Report Public
2015 2nd Quarter 2015 2nd quarterly report TPF-5(264).docx Quarterly Progress Report Public
2015 3rd Quarter 2015 3rd quarterly report TPF-5(264).docx Quarterly Progress Report Public
2015 4th Quarter 2015 4th quarterly report_TPF-5(264).pdf Quarterly Progress Report Public
2016 1st Quarter 2016 1st quarterly report TPF-5(264).docx Quarterly Progress Report Public
2016 2nd Quarter 2016 2nd quarter rpt_TPF-5(264).docx Quarterly Progress Report Public
2016 3rd Quarter 2016 3rd quarter rpt_TPF-5(264).docx Quarterly Progress Report Public
2016 4th Quarter 2016 4th quarter rpt_TPF-5(264).docx Quarterly Progress Report Public
2017 1st Quarter 2017 1st quarter rpt_TPF-5(264).docx Quarterly Progress Report Public
2017 2nd Quarter 2017_2nd_quarter_rpt_TPF-5(264).docx Quarterly Progress Report Public
2017 3rd Quarter 2017 3rd quarter rpt_TPF-5(264).docx Quarterly Progress Report Public
2017 4th Quarter 2017 4th quarter rpt_TPF-5(264).docx Quarterly Progress Report Public
2018 1st Quarter 2018 1st quarter rpt_TPF-5(264).docx Quarterly Progress Report Public
2018 2nd Quarter 2018 2nd quarter rpt_TPF-5(264).docx Quarterly Progress Report Public
2018 4th Quarter 2018 4th quarter rpt_TPF-5(264).docx Quarterly Progress Report Public
2019 1st Quarter 2019 1st quarter rpt_TPF-5(264).docx Quarterly Progress Report Public
2019 2nd Quarter 2019 2nd quarter rpt_TPF-5(264).docx Quarterly Progress Report Public
2019 3rd Quarter 2019 3rd quarter rpt_TPF-5(264).docx Quarterly Progress Report Public
2019 4th Quarter 2019 4th quarter rpt_TPF-5(264).docx Quarterly Progress Report Public
2020 1st Quarter 2020 1st quarter rpt_TPF-5(264).docx Quarterly Progress Report Public
2020 2nd Quarter 2020 2nd quarter rpt_TPF-5(264).docx Quarterly Progress Report Public
2020 3rd Quarter 2020 3rd quarter rpt_TPF-5(264).docx Quarterly Progress Report Public
2020 4th Quarter 2020 4th quarter rpt_TPF-5(264).docx Quarterly Progress Report Public
2021 1st Quarter 2021 1st quarter rpt_TPF-5(264).docx Quarterly Progress Report Public
2021 2nd Quarter 2021 2nd quarter rpt_TPF-5(264).docx Quarterly Progress Report Public
2021 3rd Quarter 2021 3rd quarter rpt_TPF-5(264).docx Quarterly Progress Report Public
Task 2 Report TPF-5(264) Task 2 rpt_08Oct2012.pdf Study Summary Public
Task 3 preliminary field test report TPF-5(264) Task 3 prelim field rpt_19Nov2012.pdf Study Summary Public
Task 4 Preliminary Field Test Report Task 4 prelim field rpt_24Jan2013-TPF-5(264).pdf Study Summary Public
Task 3 Report TPF-5(264) Task 3 report_28Mar2013.pdf Study Summary Public
Task 4 Report TPF-5(264) Task 4 report_18Apr2013.pdf Study Summary Public
Task 7 Preliminary Report TPF5264 Task 7 prelim rpt (45 deg unconfined & MSE)_05Mar2014.pdf Study Summary Public
Task 8 Preliminary Report TPF5264 Task 8 prelim rpt (3ft sand unconfined)_20Mar2014.pdf Study Summary Public
Task 9 Preliminary Report TPF5264 Task 9 prelim rpt (RC wingwalls)_18Jun2014.pdf Study Summary Public
Task 10 Preliminary Report TPF5264 Task 10 prelim rpt (unconfined gravel)_26Sep2014.pdf Study Summary Public
Task 11 Preliminary Report TPF5264 Task 11 prelim rpt (GRS backfill)_25Nov2014.pdf Study Summary Public

No document attached.

Passive Force-Displacement Relationships for Skewed Abutments

General Information
Study Number: TPF-5(264)
Lead Organization: Utah Department of Transportation
Contract Start Date: Aug 13, 2012
Solicitation Number: 1312
Partners: CA, FHWA, MN, MT, NY, OR, UT, WI
Contractor(s): Brigham Young University
Status: Contract signed
Est. Completion Date: Jul 31, 2021
Contract/Other Number: 13-8123
Last Updated: Oct 29, 2021
Contract End Date: Jul 31, 2021
Financial Summary
Contract Amount: $400,000.00
Total Commitments Received: $400,000.00
100% SP&R Approval:
Contact Information
Lead Study Contact(s): David Stevens
davidstevens@utah.gov
Phone: 801-589-8340
FHWA Technical Liaison(s): Jennifer Nicks
jennifer.nicks@dot.gov
Phone: 202- 493-3075
Commitments by Organizations
Organization Year Commitments Technical Contact Name Funding Contact Name Contact Number Email Address
California Department of Transportation 2013 $50,000.00 Charles Sikorsky Sang Le 916-227-0701 sang.le@dot.ca.gov
California Department of Transportation 2016 $100,000.00 Charles Sikorsky Sang Le 916-227-0701 sang.le@dot.ca.gov
Federal Highway Administration 2013 $25,000.00 Jennifer Nicks Jack Jernigan 202-493-3363 Jack.Jernigan@dot.gov
Minnesota Department of Transportation 2012 $15,000.00 Dave Conkel Lisa Jansen 651-366-3779 lisa.jansen@state.mn.us
Minnesota Department of Transportation 2013 $15,000.00 Dave Conkel Lisa Jansen 651-366-3779 lisa.jansen@state.mn.us
Montana Department of Transportation 2012 $15,000.00 Stephanie Brandenberger Susan Sillick 406-444-7693 ssillick@mt.gov
Montana Department of Transportation 2013 $15,000.00 Stephanie Brandenberger Susan Sillick 406-444-7693 ssillick@mt.gov
New York State Department of Transportation 2012 $20,000.00 Steve Conklin Wes Yang 518-457-4660 wes.yang@dot.ny.gov
New York State Department of Transportation 2013 $20,000.00 Steve Conklin Wes Yang 518-457-4660 wes.yang@dot.ny.gov
Oregon Department of Transportation 2011 $0.00 Susan Ortiz Michael Bufalino 503-986-2845 Michael.Bufalino@odot.state.or.us
Oregon Department of Transportation 2012 $15,000.00 Susan Ortiz Michael Bufalino 503-986-2845 Michael.Bufalino@odot.state.or.us
Oregon Department of Transportation 2013 $15,000.00 Susan Ortiz Michael Bufalino 503-986-2845 Michael.Bufalino@odot.state.or.us
Utah Department of Transportation 2012 $30,000.00 Darin Sjoblom David Stevens 801-589-8340 davidstevens@utah.gov
Utah Department of Transportation 2013 $20,000.00 Darin Sjoblom David Stevens 801-589-8340 davidstevens@utah.gov
Utah Department of Transportation 2016 $15,000.00 Darin Sjoblom David Stevens 801-589-8340 davidstevens@utah.gov
Wisconsin Department of Transportation 2014 $15,000.00 James Luebke Ethan Severson 608-266-1457 ethanp.severson@dot.wi.gov
Wisconsin Department of Transportation 2015 $0.00 James Luebke Ethan Severson 608-266-1457 ethanp.severson@dot.wi.gov
Wisconsin Department of Transportation 2016 $15,000.00 James Luebke Ethan Severson 608-266-1457 ethanp.severson@dot.wi.gov

Study Description

Study Description

Passive force-displacement relationships have been developed based on lateral load tests on pile caps/abutments aligned perpendicular to the soil backfill. However, many bridge abutments are constructed at a skew relative to the backfill. The orientation of the skew appears to cause the abutment to slide past the backfill and leads to torsion on the bent. This becomes an important consideration for integral abutments subject to thermal expansion. In addition, post-earthquake reconnaissance studies in Chile and numerical analysis suggest that bridges with skewed abutments are likely to experience more damage in seismic events. No large scale tests have been performed on skewed abutments to this point to help designers better analyze this behavior, but limited small scale tests and computer analyses indicate that the ultimate passive force may decrease as skew angle increases. No design procedures are currently available to define how the passive resistance would change for variations in skew angle. This research study would conduct large scale field tests to evaluate the effect of abutment skew on passive force.

Regarding Phase II: Controlled Low-Strength Materials (CLSM) (a.k.a. flowable fill, cellular concrete, etc.) are increasingly being used as backfill materials instead of compacted granular fills due to their ease of placement. Although CLSM backfill can accelerate the bridge construction process, there is currently no basis for selecting design parameters for this material. Some study partners requested research field testing of CLSM as abutment backfill to better understand passive resistance, with and without skew, and seismic performance.

Objectives

Objectives for Phase I of this study include:

1. Determine passive force-displacement curves for skewed abutments with and without wingwalls from large scale tests.

2. Provide comparisons of behavior of skewed abutments with that of normal abutments.

3. Evaluate the effect of wingwalls on response.

4. Develop design procedures for calculating passive force-displacement curves for skewed abutments.

Objectives for Phase II of this study include:

1. Define bridge abutment passive force-deflection relationships for CLSM backfill from large-scale testing.

2. Determine the influence of skew angle on the resistance of CLSM backfills.

3. Determine the effect of rotation during passive force development and the reduction in passive force for skewed abutments.

4. Develop design procedures to account for the observed passive force-deflection relationships for CLSM backfills.

5. Investigate the effect of rotation on passive force reduction factors defined previously for longitudinal loading only.

Scope of Work

Phase I tasks for this study include:

I-1. Perform literature review to collect available data and analysis regarding skewed abutment performance.

I-2. Perform laboratory passive force-deflection tests on 2 ft high wall with skew angles of 0º, 15º, 30º and 45º.

I-3. Perform field passive force-deflection tests on 5.5 ft high abutment with skew angles of 0º, 15º, and 30º and transverse wingwalls.

I-4. Perform field passive force-deflection tests on 5.5 ft high abutment with skew angles of 0º, 15º, 30º and MSE wingwalls.

I-5. Calibrate computer model to results of physical model tests and conduct parametric studies.

I-6. Prepare a final report that documents the entire research effort and disseminate results.

(Tasks 7 - 12 added April 2013)

I-7. Perform additional field passive force-deflection tests on 5.5 ft high abutment with a skew angle of 45º with and without MSE wingwalls.

I-8. Perform field passive force-deflection tests on 3.0 ft high unconfined backfill with skew angles of 0º and 30º.

I-9. Perform field passive force-deflection tests on 5.5 ft high pile cap with concrete wingwalls and skew angles of 0º and 45º.

I-10. Perform field passive force-deflection tests on 3.5 ft high unconfined gravel backfill with skew angles of 0º and 30º.

I-11. Perform field passive force-deflection tests on 3.5 ft high GRS gravel backfill with skew angles of 0º and 30º.

I-12. Present the results of the study at TRB and AASHTO meetings.

Phase II tasks for this study include: (added July 2016)

II-1. Conduct literature review to define typical characteristics of CLSM backfill

II-2. Perform lab-scale passive force test with CLSM

II-3. Conduct large-scale passive force field tests with CLSM

II-4. Perform large-scale passive force tests with rotation and longitudinal displacement

II-5. Validate or calibrate computer models

II-6. Develop simplified design models to simulate observed performance

II-7. Prepare final report with design examples for typical cases

II-8. Disseminate results and work with sponsors and AASHTO to implement findings into future codes

Comments

The Principal Investigator for this study will be Dr. Kyle Rollins of Brigham Young University. Dr. Rollins has extensive experience with lateral passive force tests on abutments and pile caps. He has been the Principal Investigator on previous passive force pooled fund studies led by the Utah Department of Transportation. In addition he has a 6 ft high pile cap in the field which can be adapted to skewed abutment testing with MSE wing walls.

Lab testing is planned to begin in the spring of 2012, followed by conducting of field tests and other project tasks.

The minimum partner commitment expected is $20,000.

Title File/Link Type Private
Acceptance Memo Signed Acceptance Memo.PDF Memorandum Public
2012 2nd Quarter 2012 2nd quarterly report_TPF-5(264).docx Quarterly Progress Report Public
2012 3rd Quarter 2012 3rd quarterly report_TPF-5(264).docx Quarterly Progress Report Public
2012 4th Quarter 2012 4th quarterly report_TPF-5(264).docx Quarterly Progress Report Public
2013 1st Quarter 2013 1st quarterly report_TPF-5(264).docx Quarterly Progress Report Public
2013 2nd Quarter 2013 2nd quarterly report_TPF-5(264).docx Quarterly Progress Report Public
2013 3rd Quarter 2013 3rd quarterly report_TPF-5(264).docx Quarterly Progress Report Public
2013 4th Quarter 2013 4th quarterly report_TPF-5(264).docx Quarterly Progress Report Public
2014 1st Quarter 2014 1st quarterly report_TPF-5(264).docx Quarterly Progress Report Public
2014 2nd Quarter 2014 2nd quarterly report_TPF-5(264).docx Quarterly Progress Report Public
2014 3rd Quarter 2014 3rd quarterly report_TPF-5(264).docx Quarterly Progress Report Public
2014 4th Quarter 2014 4th quarterly report_TPF-5(264).docx Quarterly Progress Report Public
2015 1st Quarter 2015 1st quarterly report_TPF-5(264).docx Quarterly Progress Report Public
2015 2nd Quarter 2015 2nd quarterly report TPF-5(264).docx Quarterly Progress Report Public
2015 3rd Quarter 2015 3rd quarterly report TPF-5(264).docx Quarterly Progress Report Public
2015 4th Quarter 2015 4th quarterly report_TPF-5(264).pdf Quarterly Progress Report Public
2016 1st Quarter 2016 1st quarterly report TPF-5(264).docx Quarterly Progress Report Public
2016 2nd Quarter 2016 2nd quarter rpt_TPF-5(264).docx Quarterly Progress Report Public
2016 3rd Quarter 2016 3rd quarter rpt_TPF-5(264).docx Quarterly Progress Report Public
2016 4th Quarter 2016 4th quarter rpt_TPF-5(264).docx Quarterly Progress Report Public
2017 1st Quarter 2017 1st quarter rpt_TPF-5(264).docx Quarterly Progress Report Public
2017 2nd Quarter 2017_2nd_quarter_rpt_TPF-5(264).docx Quarterly Progress Report Public
2017 3rd Quarter 2017 3rd quarter rpt_TPF-5(264).docx Quarterly Progress Report Public
2017 4th Quarter 2017 4th quarter rpt_TPF-5(264).docx Quarterly Progress Report Public
2018 1st Quarter 2018 1st quarter rpt_TPF-5(264).docx Quarterly Progress Report Public
2018 2nd Quarter 2018 2nd quarter rpt_TPF-5(264).docx Quarterly Progress Report Public
2018 4th Quarter 2018 4th quarter rpt_TPF-5(264).docx Quarterly Progress Report Public
2019 1st Quarter 2019 1st quarter rpt_TPF-5(264).docx Quarterly Progress Report Public
2019 2nd Quarter 2019 2nd quarter rpt_TPF-5(264).docx Quarterly Progress Report Public
2019 3rd Quarter 2019 3rd quarter rpt_TPF-5(264).docx Quarterly Progress Report Public
2019 4th Quarter 2019 4th quarter rpt_TPF-5(264).docx Quarterly Progress Report Public
2020 1st Quarter 2020 1st quarter rpt_TPF-5(264).docx Quarterly Progress Report Public
2020 2nd Quarter 2020 2nd quarter rpt_TPF-5(264).docx Quarterly Progress Report Public
2020 3rd Quarter 2020 3rd quarter rpt_TPF-5(264).docx Quarterly Progress Report Public
2020 4th Quarter 2020 4th quarter rpt_TPF-5(264).docx Quarterly Progress Report Public
2021 1st Quarter 2021 1st quarter rpt_TPF-5(264).docx Quarterly Progress Report Public
2021 2nd Quarter 2021 2nd quarter rpt_TPF-5(264).docx Quarterly Progress Report Public
2021 3rd Quarter 2021 3rd quarter rpt_TPF-5(264).docx Quarterly Progress Report Public
Task 2 Report TPF-5(264) Task 2 rpt_08Oct2012.pdf Study Summary Public
Task 3 preliminary field test report TPF-5(264) Task 3 prelim field rpt_19Nov2012.pdf Study Summary Public
Task 4 Preliminary Field Test Report Task 4 prelim field rpt_24Jan2013-TPF-5(264).pdf Study Summary Public
Task 3 Report TPF-5(264) Task 3 report_28Mar2013.pdf Study Summary Public
Task 4 Report TPF-5(264) Task 4 report_18Apr2013.pdf Study Summary Public
Task 7 Preliminary Report TPF5264 Task 7 prelim rpt (45 deg unconfined & MSE)_05Mar2014.pdf Study Summary Public
Task 8 Preliminary Report TPF5264 Task 8 prelim rpt (3ft sand unconfined)_20Mar2014.pdf Study Summary Public
Task 9 Preliminary Report TPF5264 Task 9 prelim rpt (RC wingwalls)_18Jun2014.pdf Study Summary Public
Task 10 Preliminary Report TPF5264 Task 10 prelim rpt (unconfined gravel)_26Sep2014.pdf Study Summary Public
Task 11 Preliminary Report TPF5264 Task 11 prelim rpt (GRS backfill)_25Nov2014.pdf Study Summary Public
No document attached.

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