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Here's how to drive a vibratory roller for beginners?

Release time:

2023-01-12

Source:

reticulation

Vibratory rollers, also known as compactors, are a kind of pavement engineering machinery and equipment that can often be seen. Its working principle is usually to rely on its own force for those sandy, semi-clay soil or asphalt concrete ground to carry out the plasticity of the uplift effect of compaction.

I. Vibratory roller standard

1, tamping the ground from both sides of the road surface edge gradually, gradually rolling to move to the core of the road surface. Before and after the right and left 2 times after rolling the extrusion molding belt need to have counted the total width of the overlap, tandem roller and single theory of vibratory roller of the total width of the overlap to take 250 ~ 300mm, static milling three-wheeled roller of the total width of the overlap can be used to the main pressure roller of the half.

2, vibratory roller as close as possible to the asphalt paver rolling, and the development of the first light and then heavy pressure way to ensure that in the asphalt mixture cooled to less than the need for low ambient temperature before reaching the compaction requirements.

3, all over the rolling to pay attention to the ambient temperature. Modified asphalt for 80 ~ 150 ℃ in the middle (raw material oil asphalt for 90 ~ 110 ℃, if rolling temperature is too high, the raw material will be squeezed to the roller before the occurrence of pescetta along the edges of the roller caused by transverse cracks and adhesion to the roller in the situation. When rolling temperature is low, asphalt viscosity rises, can not be compacted, rolling the ground will have cracking conditions.

4. When rolling asphalt concrete in Tai Po, the operator should first drive the active wheel into a fresh mixing quarry to minimize rippling and cracking problems. Maintain the rolling rate is stable, hot material on the whole surface layer can not be arbitrarily stopped; turn for or start should be sluggish, which can reduce the pressure mark to small.

Second, vibration roller way skills

1, along the road vertically to carry out tamping, rolling in accordance with the "first light and then heavy, first slow and then fast, first side after the center (curve map area according to the first inside, after both sides)" principle. Select the negative pressure 1 times + strong vibration 3-4 times + weak vibration 2 times + negative pressure 1 times, walking speed to keep within 4km / h form.

2, uphill start rolling, roller development, termination and speed need to be stabilized to prevent the rate is too high or too low.

3, uphill start rolling before, should make the asphalt mixture cooling to the required high limit of ambient temperature, and then carry out the base pile pre-pressure treatment, to be asphalt mixture ambient temperature down to the low limit (120 ℃), before selecting the vibration compaction.

4, downhill rolling should try to avoid sudden speed and braking system.

5, in the steep incline under the premise of downhill rolling, the first application of light roller to carry out pre-pressure treatment, and then use the super-heavy roller or vibratory roller to carry out tamping.

6, whether it is uphill start or downhill, asphalt concrete under the edge of the layer must be clean and dry, and must be sprayed with asphalt combined layer, in order to prevent the asphalt mixture in the rolling when moving.

7, whether it is uphill start rolling or downhill rolling, vibratory rollers should be behind the active wheel. Doing so has the following advantages: when starting uphill, the rear of the active wheel can withstand the slope and the equipment itself to provide impetus, together with the front tire on the ground to carry out the basic tamping to bear the active wheel formed by the relatively large shear stress; downhill, the roller's own weight of the formation of the impact force is to rely on the active wheel of the brakes to offset the front tire only after rolling the asphalt mixture will be supported by the active wheel caused by the rear Shear stress capacity.

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