Pedestrian Bridge Monitoring

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SCOPE: Deliver a unique hardware and software monitoring solution for the transition of land from old Railroad grounds to a jogging, walking, inline skating, and bicycling path.

SERVICES DELIVERED:

Specto Technology supplied state-of-the-art monitoring products including crackmeters, tiltmeters, wireless dataloggers and ARGUS software for implementation in the field.

PROJECT OVERVIEW:

The Katy Trail is a jogging, walking, inline skating, and bicycling path that runs through the Uptown and Oak Lawn areas of Dallas, Texas, following the path of the old Missouri-Kansas-Texas Railroad, which was known as MKT or the Katy.
The construction work to convert the unused 3.5 miles railway track into a hiking trail took place between 2000 and 2007.
Since completion, it has been expanded several times and is currently on final extension phase (Phase VI).
The Phase VI is 0.65 miles long, includes 2 pedestrian bridges and the estimated cost is $14.1 million.
Phase VI construction started in October 2015 and was completed in January 2018.

UNIQUE CHALLENGES:

Unique engineering designs and monitoring for the project is required due to the fact that one of the bridge (over Mockingbird Lane) sits atop a Dallas Area Rapid Transit (DART) tunnel.
A cantilevered suspension bridge design had to be utilized to push the bridge foundation away from the tunnel.

INSTRUMENTATION & MONITORING SCHEME:

The instrumentation and monitoring scheme, designed and carried out by HNTB and Rebcon Inc., respectively, consists of the following instruments, dataloggers and software:

VW Crackmeters

20 x crackmeters are installed inside the DART tunnel
These monitor cracks in the tunnel lining

MEMS Tiltmeters

11 x tiltmeters are installed on retaining structures
They monitor the rotation of the retaining structure

LS-G6 Wireless Data Acquisition System

The LS-G6 system, by Loadsensing, was selected due to its long range radio, low power consumption, easy implementation and because it’s capable of working inside the tunnel
The system consists of one gateway, 11 x nodes for the MEMS tiltmeters and 5 x nodes for the VW crackmeters
The system collects readings automatically and wirelessly from the crackmeters and the tiltmeters

Deformation Monitoring Points

92 x prisms were installed in and outside the DART tunnel
These are monitored by manual, optical survey

ARGUS Software

ARGUS was selected for its ability to simply display data online in real time
The software is used for web based management and reporting of data from all automated instruments and from manual optical survey points

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SERVICES DELIVERED:

[/vc_column_text][vc_column_text]Specto Technology supplied state-of-the-art monitoring products including crackmeters, tiltmeters, wireless dataloggers and ARGUS software for implementation in the field.[/vc_column_text][vc_separator type=”transparent” thickness=”32″ up=”0″ down=”0″][vc_column_text]

PROJECT OVERVIEW:

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The Katy Trail is a jogging, walking, inline skating, and bicycling path that runs through the Uptown and Oak Lawn areas of Dallas, Texas, following the path of the old Missouri-Kansas-Texas Railroad, which was known as MKT or the Katy.
The construction work to convert the unused 3.5 miles railway track into a hiking trail took place between 2000 and 2007.
Since completion, it has been expanded several times and is currently on final extension phase (Phase VI).
The Phase VI is 0.65 miles long, includes 2 pedestrian bridges and the estimated cost is $14.1 million.
Phase VI construction started in October 2015 and was completed in January 2018.

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UNIQUE CHALLENGES:

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Unique engineering designs and monitoring for the project is required due to the fact that one of the bridge (over Mockingbird Lane) sits atop a Dallas Area Rapid Transit (DART) tunnel.
A cantilevered suspension bridge design had to be utilized to push the bridge foundation away from the tunnel.

[/vc_column_text][vc_separator type=”transparent” thickness=”32″ up=”0″ down=”0″][/vc_column][vc_column width=”1/2″ css=”.vc_custom_1514565102426{padding-top: 2.5em !important;padding-right: 2.5em !important;padding-bottom: 2.5em !important;padding-left: 2.5em !important;background-color: #f5f5f5 !important;}” el_class=”case-study-scheme”][vc_column_text]

INSTRUMENTATION & MONITORING SCHEME:

[/vc_column_text][vc_column_text]The instrumentation and monitoring scheme, designed and carried out by HNTB and Rebcon Inc., respectively, consists of the following instruments, dataloggers and software: