Use of Smart Rocks to Improve Rock Slope Design

Rock slopes pose a hazard to the traveling public when weathering processes dislodge portions of the slope that can fall into the road. Current ditch design practice relies on design criteria developed decades ago in different environments with different rock types. Current hazard rating practice rates the rock slopes based on semi-quantitative measures using a Rockfall Hazard Rating System (RHRS). Both the design of new rock slopes and the hazard assessment of existing rock slopes need improvement to increase safety against rockfall, construct better engineered slopes and reduce short and long term maintenance costs. This proposed research project will conduct rockfall experiments with a smart rock on 10 rock cuts that are rated A or B according to the New Hampshire RHRS. The smart rock is a sensor system equipped with a 3-axis accelerometer and gyroscope, embedded in a regular rock, to measure impact (acceleration) and rotational velocity (gyroscope). The results of these experiments can be used to calibrate a model for rockfall simulation. Concurrent work funded through the STIC grant program is collecting highly detailed 3D point clouds for 20 A and B rated slopes. The results of the STIC work will serve as input for the smart rock models. The calibrated rockfall model will be used, in conjunction with structural risk factors from the 3D point cloud, to further refine hazard ratings of rock slopes and prioritize remediation efforts. For new rock cuts, design slopes will be input to the model to refine catchment geometries.

Language

  • English

Project

  • Status: Proposed
  • Funding: $75,000
  • Contract Numbers:

    26962Z

  • Sponsor Organizations:

    New Hampshire Department of Transportation

    John O. Morton Building
    P.O. Box 483
    Concord, NH  United States  03302-0483
  • Managing Organizations:

    New Hampshire Department of Transportation

    John O. Morton Building
    P.O. Box 483
    Concord, NH  United States  03302-0483
  • Project Managers:

    Nash, Deirdre

  • Performing Organizations:

    University of New Hampshire, Durham

    Department of Civil Engineering
    Durham, NH  United States  03824
  • Principal Investigators:

    Benoit, Jean

  • Start Date: 20181101
  • Expected Completion Date: 20201231
  • Actual Completion Date: 0

Subject/Index Terms

Filing Info

  • Accession Number: 01686178
  • Record Type: Research project
  • Source Agency: New Hampshire Department of Transportation
  • Contract Numbers: 26962Z
  • Files: RiP, STATEDOT
  • Created Date: Nov 20 2018 1:25PM