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TxDOT US 377 Cresson Relief Route
The US 377 Cresson Relief Route is an alternate route outside Cresson, Texas from about 1.4 miles south to about 1.1 miles north of the SH 171 intersection. HVJ Associates® provided design and construction recommendations for bridges, retaining walls, and embankments. Due to delays in acquiring right-of-entry and a fixed letting date, it was necessary to conduct the geotechnical study on an expedited schedule. Furthermore, we were unable to collect some geotechnical information due to lack of access to a few private properties.
Owners of private properties denying Right-of-Entry, and prohibiting the collection of geotechnical borings within portions of the project alignment.
Provide geotechnical design information sufficient to obtain a reasonable bid while reducing the risk of change orders to TxDOT.
With little geotechnical information collected for the project, our knowledge of the local geology proved a big help. This knowledge enabled us to collaborate with URS/AECOM and TxDOT Fort Worth District to develop design-bid packages covering several possible scenarios.
Another significant challenge was an embankment fill up to 50 feet above the existing ground surface where settlement could impact pavement and retaining wall structures. We created a 3-dimensional model of the embankment and calculated the embankment's initial settlement as well as its potential settlement over time to develop several alternative settlement reduction measures. These possible measures included installation a geofoam embankment over the existing on-site soils, placing a select fill embankment over foundation soils with wick drains, constructing a select fill embankment over select fill foundation soils, and building a select fill embankment over existing foundation soils.
We also worked closely with TxDOT to find a nearby source for select fill material that was tested and approved, providing significant cost savings due to proximity.
Krishna Peapully, PE, AECOM