Develop design guidelines to utilize partially grouted riprap (PGR) as a scour countermeasure mitigation alternative to protect bridge abutments and piers from scour during a flood.
Other Project Purposes
Collaborate with the PADEP, USACE, PFBC and USFWS in the development of the design
guidelines and in support of the technical direction of the research project, in particular, the
implementation of these design guidelines and the construction of PGR at scour critical bridge in
Construct PGR countermeasure at scour critical bridge in District 6-0 in accordance with the developed guidelines.
Evaluate the environmental impacts on the stream at the installation bridge before, during, and after the construction of the PGR countermeasure through monitoring of hydrologic and hydraulic conditions.
Perform an inspection at the PGR installation site after a major flood or during the NBIS bridge inspection cycles to assess the performance and the needed maintenance of the constructed PGR countermeasure.
PennDOT Design guidelines to utilizing PGR at bridge piers and abutments as a vital countermeasure for scour control and remediation that minimizes environmental impacts and demonstrates strong cost benefit/low life cycle costs. The guidelines will include special provisions to design and install PGR in the dry as well as placed in the wet (under water). The guidelines will include design, construction, inspection, maintenance, and performance specification.
The design guidelines of PGR countermeasure will have the approval and support of environmental regulating agencies for PGR installation including; PennDOT District 6-0, PADEP,
USACE, PFBC and USFWS.
Grout testing and water quality testing procedures.
Improved grout mix design and correlation of the field-testing to ASTM testing standards.
Assessment of the performance standards and maintenance recommendations for the PGR countermeasure.
Minimize the environmental impact of constructed PGR countermeasure.
In support of PennDOT’s Strategic Goals
Leverage resources to maximize effectiveness
Continually increase efficiency
Promote continuous improvement and innovation
Provide timely, quality service for our customers