FAO IRRIGATION AND DRAINAGE PAPER - 30
by
R.G. Koegel
FAO Consultant
University of Wisconsin
Madison, Wisconsin
Reprinted 1985
FAO - FOOD AND AGRICULTURE ORGANIZATION OF THE UNITED NATIONS
Rome, 1985
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The designations employed and the presentation of material in this publication do not imply the expression of any opinion whatsoever on the part of the Food and Agriculture Organization of the United Nations concerning the legal status of any country, territory, city or area or of its authorities, or concerning the delimitation of its frontiers or boundaries. |
M-56
ISBN 92-5-100398-X
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© FAO 1985
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3. Comparison of large and small diameter wells
4.1 Bored or augered wells
4.2 Driven wells
4.3 Jetted wells
4.4 Hydraulic percussion (also hollow rod method)
4.5 Percussion (also cable tool method)
4.6 Hydraulic rotary
4.7 Casing and screens
4.8 Methods for obtaining vertical reciprocating motion
4.9 Rope
4.10 Well development and finishing
4.11 Problem solving
5.1 Rationale for construction of large diameter wells
5.2 Dimensions for large diameter wells
5.3 Excavation
5.4 Lining the excavation
5.5 Equipment for raising and lowering materials
5.6 Moulds
5.7 Concrete work
5.8 Safety
5.9 Finishing large diameter wells
9. Availability of skills and materials