GC:
CT: Grout Hole Drilling: Drill grout holes with standard rotary or percussion drilling equipment. No core recovery will be required and the type bit used shall be optional with the Contractor. The hole shall be of sufficient diameter to allow use of an expansion plug or packer with an effective inside diameter of not less than 13 mm 1/2 inch.
S: https://www.wbdg.org/ccb/DOD/UFGS/UFGS%2031%2032%2023.pdf (last access: 28 December 2014)
N: 1. Drilling for grouting: What is drilling for grouting all about.
Grouting operations are performed to seal, strenghten or consolidate rock and soil in for example dams and foundation works.
Commonly used methods: When drilling grout holes, rotary drilling and percussive drilling are the most commonly used methods. In tunnels, gallery grouting is made in a fan pattern to strengthen the lining of the excavation.
Jet grouting is a method to reinforce the ground by pumping in a cement paste into the soil at high pressure, with purpose to build either cement columns or totally consolidate the formations.
2. Geothermal Borehole Drilling: The drilling of boreholes for geothermal energy is the most difficult part of the ground source heat pump installation. The geology of Great Britain is as diverse and complex as anywhere in the world so it is essential that the correct drilling method is used in the appropriate geological and site conditions. TND Drilling have the equipment, skills and experience to deliver this for you.
TND Drilling provide dedicated services for the drilling and installation of geothermal holes, grouting the hole, header pipe work insulation using electro fusion joints and the thermal response test if required.
3. drilling injection hole: Holes for the injection of grout may be drilled with jackhammers, wagon drills, diamond drills, or shot drills depending on the terrain, class of foundation material, and size and depth of holes.
S: 1. http://www.atlascopcoexploration.com/EN/drilling-for-grouting/index.php (last access: 28 December 2014). 2. http://www.tnddrilling.co.uk/geothermal-drilling.html (last access: 28 December 2014). 3. TERMIUMPLUS.
SYN: drilling injection hole
S: TERMIUMPLUS
