TxDOT Research Library - View Research-in-Progress

Show:

31981
7/29/2023 5:30 AM EDT
Lawson, William D. (William Dieterich)
Center for Multidisciplinary Research in Transportation (TechMRT)
RS: William (Bill) Lawson
Backfilling Data collection Pullout tests Resistance (Mechanics) Retaining walls Shear reinforcement
This research study involves a comprehensive and detailed review of pullout resistance of backfill reinforcement used in mechanically stabilized earth (MSE) walls constructed in Texas. There are two major thrust areas in the proposed study: (a) evaluation of pullout resistance factors for specific backfill-reinforcement combinations used by Texas Department of Transportation (TxDOT), and (b) review and testing of typical reinforcement details used to circumvent vertical and horizontal obstructions. The research plan to accomplish the above research objectives relies heavily on a comprehensive, large-scale pullout test program. At the outset, the researchers will collect available information pertaining to pullout resistance and reinforcement detailing around obstructions and document them. Then the researchers will select specific backfill- reinforcement combinations and obstruction reinforcement details to be included in the test program. Once substantial data has been generated through testing, data analysis will begin. New reinforcement pullout resistance factors will be developed for conditions representative of TxDOT construction and the impact on their use in wall design will be evaluated. Data obtained from tests conducted on obstruction details will be used to identify optimum reinforcement configurations to address commonly encountered obstruction situations. Based on these findings guidelines will be developed for implementation of reinforcement details around obstructions. These guidelines will be refined based on review by industry representatives as well as through a field constructability review. Final products will include: a database of pullout resistance, a field guide (field manual) and necessary training material.
3/20/2015
TxDOT Research Project
0-6493
Pullout Resistance of Mechanically Stabilized Earth Reinforcements in Backfills Typically Used in Texas
Texas Department of Transportation (TxDOT)
9/1/2009
8/31/2012
7/29/2023 5:30 AM EDT
TxDOT Research Project 0-6493
Completed
Public
7/29/2023 5:30 AM EDT
TxDOT Implementation 5-6493-01
TECH
Loading...

31981

AutoDate

7/29/2023 5:30 AM EDT

Researchers

Lawson, William D. (William Dieterich)

Performing Institution

Center for Multidisciplinary Research in Transportation (TechMRT)

Research Team

RS: William (Bill) Lawson

Subject Term

Backfilling
Data collection
Pullout tests
Resistance (Mechanics)
Retaining walls
Shear reinforcement

Abstract

This research study involves a comprehensive and detailed review of pullout resistance of backfill reinforcement used in mechanically stabilized earth (MSE) walls constructed in Texas. There are two major thrust areas in the proposed study: (a) evaluation of pullout resistance factors for specific backfill-reinforcement combinations used by Texas Department of Transportation (TxDOT), and (b) review and testing of typical reinforcement details used to circumvent vertical and horizontal obstructions. The research plan to accomplish the above research objectives relies heavily on a comprehensive, large-scale pullout test program. At the outset, the researchers will collect available information pertaining to pullout resistance and reinforcement detailing around obstructions and document them. Then the researchers will select specific backfill- reinforcement combinations and obstruction reinforcement details to be included in the test program. Once substantial data has been generated through testing, data analysis will begin. New reinforcement pullout resistance factors will be developed for conditions representative of TxDOT construction and the impact on their use in wall design will be evaluated. Data obtained from tests conducted on obstruction details will be used to identify optimum reinforcement configurations to address commonly encountered obstruction situations. Based on these findings guidelines will be developed for implementation of reinforcement details around obstructions. These guidelines will be refined based on review by industry representatives as well as through a field constructability review. Final products will include: a database of pullout resistance, a field guide (field manual) and necessary training material.

Date Cataloged

3/20/2015

TxDOTtype

TxDOT Research Project

Study Number

0-6493

Study Name

Pullout Resistance of Mechanically Stabilized Earth Reinforcements in Backfills Typically Used in Texas

Sponsor

Start Date

9/1/2009

End Date

8/31/2012

RecordCreated

7/29/2023 5:30 AM EDT

Deliverables

TxDOT Research Project 0-6493

Status

Completed

AccessControl

Public

RecordUpdated

7/29/2023 5:30 AM EDT