Design-Manual-for-Low-Volume-Roads-Part-G

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G - Chapter 3 - 7 The choice of spot improvement should be based on the location features and the materials and skills available locally. Great care should be used in using gravel as a road surface in some circumstances. It is unlikely that it will be suitable due to high costs of replacing the surface material that will be lost due to rainfall or traffic, or dust nuisance in the locations; where: •¡ Traffic is more than 200 motor vehicles per day •¡ Annual Rainfall is greater than 2,000mm •¡ Slope of road surface is more than 6% •¡ Through community settlements •¡ The haul distance from the quarry/pit to the road site is more than 10km •¡ The road section experiences flooding •¡ The gravel is of poor quality. PART G: WEREDA ROAD MAINTENANCE BOOKLET
G - Chapter 3 - 8 Despite initial low construction costs, it is important to appreciate that under a Basic Access and Spot Improvement strategy it is essential to arrange the necessary Regular maintenance of the ENS and any gravel surface and drainage, and Occasional maintenance of the improved surface sections, to preserve the initial construction investment. PART G: WEREDA ROAD MAINTENANCE BOOKLET
Page 1 and 2: FEDERAL DEMOCRATIC REPUBLIC OF ETHI
Page 4 and 5: G TABLE OF CONTENTS G - i Table of
Page 6 and 7: G - Chapter 1 - 1 1. THE AIMS OF TH
Page 8 and 9: G - Chapter 2 - 3 Drainage Features
Page 10 and 11: G - Chapter 3 - 5 materials. Other
Page 14 and 15: G - Chapter 4 - 9 4. THE PURPOSE OF
Page 16 and 17: G - Chapter 5 - 11 Defect Drainage
Page 18 and 19: G - Chapter 6 - 13 6. Occasional Ma
Page 20 and 21: G - Chapter 8 - 15 8. MAINTENANCE A
Page 22 and 23: G - Chapter 8 - 17 •¡ Disposal o
Page 24 and 25: Maintenance Activity •¡ 132 Shou
Page 26 and 27: Maintenance Activity •¡ 133 Plan
Page 28 and 29: G - Chapter 9 - 23 9. DRAINAGE Defe
Page 30 and 31: G - Chapter 9 - 25 If the silting p
Page 32 and 33: PART G: WEREDA ROAD MAINTENANCE BOO
Page 34 and 35: G - Chapter 9 - 29 When excavating
Page 36 and 37: G - Chapter 9 - 31 Case 1: When the
Page 38 and 39: G - Chapter 9 - 33 •¡ Move windr
Page 40 and 41: G - Chapter 9 - 35 Defect 7: Ditch
Page 42 and 43: G - Chapter 9 - 37 Slips or slope e
Page 44 and 45: PART G: WEREDA ROAD MAINTENANCE BOO
Page 46 and 47: G - Chapter 9 - 41 until mortar has
Page 48 and 49: G - Chapter 9 - 43 Defect 9: Dry Ma
Page 50 and 51: G - Chapter 9 - 45 Maintenance Acti
Page 52 and 53: G - Chapter 9 - 47 The gabion baske
Page 54 and 55: G - Chapter 9 - 49 The Check Dams m
Page 56 and 57: G - Chapter 10 - 51 10. ROAD SURFAC
Page 58 and 59: G - Chapter 10 - 53 Setting out •
Page 60 and 61: G - Chapter 10 - 55 Once the centre
Page 62 and 63:
G - Chapter 10 - 57 Excavate backsl
Page 64 and 65:
G - Chapter 10 - 59 Gravel Road Def
Page 66 and 67:
G - Chapter 10 - 61 •¡ The moist
Page 68 and 69:
G - Chapter 10 - 63 used for larger
Page 70 and 71:
) Light reshaping, Mechanised Metho
Page 72 and 73:
G - Chapter 10 - 67 •¡ The tract
Page 74 and 75:
G - Chapter 10 - 69 Preparation Pat
Page 76 and 77:
G - Chapter 10 - 71 Watering The to
Page 78 and 79:
G - Chapter 10 - 73 Check the Cambe
Page 80 and 81:
G - Chapter 10 - 75 Structures The
Page 82 and 83:
G - Chapter 10 - 77 OCCASIONAL MAIN
Page 84 and 85:
Quarry or Borrow Pit G - Chapter 10
Page 86 and 87:
G - Chapter 10 - 81 the site. Loadi
Page 88 and 89:
G - Chapter 10 - 83 •¡ Water sho
Page 90 and 91:
G - Chapter 10 - 85 Although well c
Page 92 and 93:
Excavation of the area to be repair
Page 94 and 95:
PART G: WEREDA ROAD MAINTENANCE BOO
Page 96 and 97:
G - Chapter 11 - 91 11. PRIORITIES
Page 98 and 99:
G - Chapter 11 - 93 most effectivel
Page 100 and 101:
G - Chapter 12 - 95 •¡ Market fo
Page 102 and 103:
G - Chapter 12 - 97 supervision has
Page 104 and 105:
G - Chapter 13 - 99 13. PLANNING AN
Page 106 and 107:
G - Chapter 13 - 101 CODE PRODUCTIV
Page 108 and 109:
G - Chapter 14 - 103 •¡ African
Page 110 and 111:
G - Chapter 15 - 105 of the camber
Page 112 and 113:
G - Chapter 15 - 107 •¡ Incremen
Page 114 and 115:
G - Chapter 15 - 109 •¡ bitumen
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Design-Manual-for-Low-Volume-Roads-Part-G

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