Chemical grouting was employed to correct a situation in which wave action has leached out embankment fines through the voids in the rock embankment. A total of seven sites where settlements have occurred were grouted. The areas to be grouted were approximately 20' x 20' with grout holes spaced 4' - 5' centers. Sites 1 through 5 were drilled and grouted in one stage. The 3-stage drilling and grouting was done to minimize the subsidence which resulted from the loss of material through the rock embankment as a result of water generated by the drilling operation. It was determined that 50 gallons of grout could be pumped at one setting. The typical grout mix was 75 lbs. Cynamid AM-9 and 10 lbs. DMAPN per 50 gallon drum of water. The catalyst was 4 lbs calcium chloride put into a second 50 gallon barrel of water. The mixture was applied at a ratio of 1:1. Terranier C (typical mix proportions are given) was used at one site. The problems encountered are mentioned. The cost of the grouting was $3.50 per foot of drill hole. The corrective work appears successful.

  • Supplemental Notes:
    • Material has been compiled from special reports as requested in Federal-Aid Highway Program Manual, Volume 6, August 23, 1974, Special Reports on Use of Equipment and Methods of Maintenance.
  • Corporate Authors:

    Federal Highway Administration

    1200 New Jersey Avenue, SE
    Washington, DC  United States  20590
  • Authors:
    • Carter, D B
  • Publication Date: 0

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00097390
  • Record Type: Publication
  • Files: TRIS, USDOT
  • Created Date: Aug 13 1975 12:00AM