Projects

AWARDS

• Arizona AGC – 2021 Build Arizona Project of the Year – Public Reconstruction: Under $10M – Highway Construction

• Pile Driving Contractors Association PDCA – 2021 Project of the Year – Land: Less Than $1M

PROJECT DESCRIPTION

This award-winning project included the complete demolition and reconstruction of two cast in-place concrete slab bridges that were supported by existing H-piles and spanned two separate washes. No beams or girders existed as both bridges were supported by existing H-piles, thus all new deck construction had to be supported by falsework erected from the bed of both existing washes. The falsework had to be erected in both washes for months, thus ADOT Environmental and the Army Corps of Engineers took particular interest in the project. The project was constructed in two phases separated by temporary concrete barrier.

Both new bridge decks were 42’-10” wide with two 12-foot lanes and two 8-foot shoulders to accommodate opposing lanes of traffic on US-180. Further scope included new abutments; approach slabs; 34-inch F-Shape bridge barrier and transitions; 6,278 SF of vibratory driven sheet pile; grouted riprap scour / slope protection; as well as shotcrete scour/slope protection. Civil scope included 500 feet of new full depth asphalt, new guardrail and end treatments, and a half mile of fog coating. Temporary traffic signals installed on either end of the project limits were used to maintain a single open lane of traffic in either direction throughout construction.

PRECONSTRUCTION SERVICES

Detailed environmental planning, coordination, and partnering took place from the very onset of the project between Banicki and ADOT to implement a falsework protection plan to channelize wash flow around the falsework elements and through open bridge spans. The falsework protection plan utilized temporary concrete barrier lined with poly sheeting to divert wash flow. ADOT Environmental and the Army Corps of Engineers approved the plan and were very pleased with the level of effort and diligence Banicki and ADOT demonstrated with this matter.

Banicki and ADOT also worked closely to develop an environmentally safe means for driving the 6,278 SF of sheet pile for the grouted riprap scour / slope protection. Due to the location and geometry of the sheet pile alignment, the piles had to be driven from the wash bed. As such, a plan was developed that utilized vegetable oil as opposed to hydraulic oil for the vibratory power pack and hammer. The environmental aspects associated with this sheet pile installation, as well as the extremely tight confines of the work, led to this project being named the 2021 Pile Driver Project of the Year for the under $1M pile scope category.