MASSIVE GROUTS AND INTRICATE ADITS SHORE UP DAM'S POROUS FOUNDATION

The successful shoring up is described of the porous foundation beneath Turkey's massive Keban Dam using over 350,000 yd. of concrete grout. The subterranean task was performed through an intricate network of adits - more than 40,000 lin. ft. driven to depths 40 ft. below the Euphrates River gorge. Most adits ranged from 8 x 8 ft. and 8 x 10 ft. up to 15 x 17 ft. (with widened internal areas matching mucking equipment's 100 ft. turning radius). Driving for small adits averaged 10 ft per day; largest ones ran to 7 ft. Air/water-powered jackhammers drilled the 5 to 10 ft. blasting holes. Battery operated locomotives and railwagons, loaded by an overhead Eimco unit, mucked from the smaller units. In large adits, a Caterpillar 955 Frontened loader and three 20-ton Man trucks serviced each face. The deeper adits demanded grouting ahead of the face before shooting to prevent groundwater inflow driving advances. Foundation exploration and grout curtain work moved in steps: core borings, curtain grouting and review of grouting results. Details are outlined of the initial drilling, grout drilling, and the major subsurface work.

Corporate Authors:
McGraw-Hill, Incorporated

330 West 42nd Street
New York, NY United States 10036
Authors:
- Ehasz, J L
Publication Date: 1975-8

Media Info

Features: Figures; Photos;
Pagination: p. 56-58
Serial:
- Construction Methods and Equipment
- Volume: 57
- Issue Number: 8
- Publisher: McGraw-Hill, Incorporated

Subject/Index Terms

TRT Terms: Boring; Concrete; Cores (Specimens); Dam foundations; Drilling machines; Groundwater; Grout; Insects; Mines; Mucking; Presplitting (Blasting); Shoring; Tunnel shafts; Tunnels; Underground structures
Uncontrolled Terms: Adits
Old TRIS Terms: Caterpillars; Curtains; Drilling equipment; Front end loaders
Subject Areas: Bridges and other structures; Construction; Highways;

Filing Info

Accession Number: 00127482
Record Type: Publication
Files: TRIS
Created Date: Mar 10 1976 12:00AM