The road from top to bottom, followed by 500 thick gravel, 300 thick cement stabilized macadam, 100 thick asphalt. While the gravel bottom elevation and elevation is very close to the top of the rain water, how to prevent the roller crushing rain water pipes?
There is no good way, the bottom of the 500 thick gravel can only be compacted with light rolling equipment, such as frog ram, impact rammer, etc., according to specifications above the pipe top 50 centimeters to use roller mill rolling.
There is no good way, the bottom of the 500 thick gravel can only be compacted with light rolling equipment, such as frog ram, impact rammer, etc., according to specifications above the pipe top 50 centimeters to use roller mill rolling.
I am not a professional, but I have seen, they are the bottom of the shop, and then pour concrete pouring, a pipe down, and so on when the concrete strength, and then pour asphalt, and then over-voltage road machine
