Komatsu HD465-8, Руководство по эксплуатации и техническому обслуживанию

Страница: 294 / 420

DETERMINE AND MAINTAIN TRAVEL ROAD
Determining and performing maintenance of the road in the jobsite are the extremely important factors both for
reasons of safety and for reducing the cycle time.
To ensure safety in operations, do as follows.
Determine travel road
• As far as possible, restrict the travel road to one-way travel.
• If it is impossible to keep one-way traffic, make the road with ample width to enable trucks traveling in oppo-
site directions to pass each other.
If it is impossible to provide a sufficient road width, provide passing places at various points along the road.
• Always design the road so that the loaded truck passes on the side closest to the hill face.
• If there are curves with poor visibility along the road, set up mirrors.
• In a place where the road shoulder is weak or likely to collapse, set up a sign at a point at least 1.5 m from
the road shoulder to warn of the danger.
• It is important to set up lighting or reflectors on the road to enable the traveling at night.
• The grade of slope should be kept within 10 % (approximately 6 °) as far as possible, and emergency es-
cape points should be set up on downhill slopes in case of any brake failure.
• Increase the number of places where the road continues in a straight line. If there are curves in high-speed
travel areas, make the radius of the curve as large as possible.
• Small S curves are particularly dangerous, so avoid such curves. The radius of the curve must be a mini-
mum of 12 m to 15 m.
• Make the radius of curves as large as possible.
• Make the road wider at curves than it is in straight areas.
• Make the surface of the road slightly higher on the outside of curves.
• Be particularly careful to strengthen the road shoulder on the outside of curves.
• Design the travel road as far as possible so that it does not cross any other travel road.
In particular, when roads cross at an angle on slopes, there is danger that a difference in height will be cre-
ated in the road, and this will make the machine sway strongly when traveling at high speed.
• Cut the slope face to provide a special road for the trucks.
Maintain travel road
Perform the necessary action according to the conditions to insure that the road can always be traveled in safe-
ty.
• Remove any unevenness in the travel surface, sloping to the left or right, or drooping of the road shoulder.
Make the road of ample strength and remove such obstacles as rocks and tree stumps.
• Maintain the road with a bulldozer or motor grader from time to time.
• Spray the road with water at suitable intervals to prevent dust from rising and reducing the visibility.
DETERMINE AND MAINTAIN TRAVEL ROAD OPERATION
3-242