Document Details

Document Number:
EI 18-004
Title:
Special Specification for Cement Grouted Rock Bolts
Status:
Inactive
Issue Date:
5/22/2018
Effective Date:
1/1/2019
Expiration Date:
8/2/2023
Resp Organization:
Geotechnical Engineering Bureau
Contact:
Randall J. Romer
Phone:
518-457-4714
Email:
randy.romer@dot.ny.gov
Item Numbers:
Drawings:
Keywords:
Rock Fall, Rock Fence, Catchment Fence, Mesh Slope, Mesh Drape, Scaling, Ditch, Wire Rope, Chain Link
Shelf Notes:
Yes
Standard Book:
No
Superseded By:
(23-024) Superseding Outdated Engineering Instructions
File:
EI 18-004
Abstract:
Rock bolts consist of a steel tensioned element generally used in reinforcing a rock slope by transferring load from the unstable exterior to the confined interior of the rock mass. Rock bolts are also used as part of a rock catchment system by anchoring the catchment device. Resin Rock Bolts A typical resin product is made up of two component cartridges containing a resin and a catalyst in separate compartments. The cartridges are pushed to the end of the drillhole ahead of the bolt rod that is then spun into the resin cartridges by the drill. The plastic sheath of the cartridges is broken and the resin and catalyst mixed by this spinning action. Resin Rock Bolts are specified via Item 203.17140017 Resin Rock Bolts – One and One Quarter Inch Nominal Diameter (Grade 150) Cement Grouted Rock Bolts Cement grout is used to develop a bond between the bolt and the rock. Slightly oversized holes are drilled and the centralized bolt is placed. The drill hole is then tremie grouted. After the drill hole grout has cured, the bolts are tested and tensioned to a specified lock-off load.