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Development of Advanced Landslide Investigation Protocol Using Geophysical Methods for Mississippi

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English


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  • Alternative Title:
    MDOT State Study 316 - Development of Advanced Landslide Investigation Protocol Using Geophysical Methods for Mississippi [Cover Title]
  • Creators:
  • Corporate Creators:
    Jackson State University
  • Corporate Contributors:
  • Subject/TRT Terms:
  • Publication/ Report Number:
    FHWA/MDOT-RD-23-316
  • Resource Type:
    Tech Report
  • Geographical Coverage:
    Mississippi;United States
  • Edition:
    Final Report, July 01, 2020 to June 30, 2023
  • Corporate Publisher:
    Mississippi. Dept. of Transportation
  • Abstract:
    Slope failures frequently occur in highway embankments in Mississippi due to the existence of highly expansive Yazoo Clay. In addition, the Mississippi climate, especially the high volume of precipitation, plays a major role in the development of landslides. State Study 316 was undertaken to evaluate the landslides throughout the states employing Advanced Geophysical and Near Surface Remote Sensing tools such as electrical resistivity imaging (ERI), LiDAR technology, and drone imaging. These tools were utilized to identify failed areas, determine their depth, and evaluate crucial soil parameters such as moisture content. Six repaired highway slopes were monitored to collect data on in-situ moisture content, matric suction, temperature variations, and deformation to evaluate their long-term performance. Additionally, ERI, LiDAR, drone imaging, and other advanced investigations were conducted on 20 failed slope sites to evaluate the causes and mechanism failure. The results of the ERI testing showed that shallower depths had higher resistivity values due to unsaturated soil, cracks, displaced disturbed soils, and air pockets that increased the air void ratio. The DEMs generated from drone imagery helped estimate the amount of displaced soil, identify the depth of the slip surface, and recreate failure conditions using numerical modeling tools. The stacked surface profiles developed from the LiDAR point cloud showed details of extreme surficial movement and helped accurately quantify the settlement. The DEMs and the surface profiles can be used as baseline data for future comparisons. Adopting these advanced tools for future research will significantly advance the quality of site investigations and increase the reliability of the design of transportation GEO infrastructures in Mississippi.
  • Format:
    PDF
  • Funding:
    SPR-2020-00(001)/108365-1011000
  • Collection(s):
  • Main Document Checksum:
    urn:sha-512:c72d6ce1ec7ea312be6babc97e5568396d42037b8cea61831e285fceee36d751f27480a49d443ed6f1e225aae2ee383a73ba1f78275df29fc494eafef7f7b3bc
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  • File Type:
    Filetype[PDF - 26.74 MB ]
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