Dynamic compaction method has the characteristics of remarkable foundation reinforcement effect, wide range of soil types, simple equipment, convenient construction, material saving, short construction period, civilized construction and low construction cost. It will be widely used when the low-lying land that is not suitable for cultivated land is backfilled as the construction site. The determination method and construction process of dynamic compaction technical parameters and the quality control measures of dynamic compaction method given in this paper have certain guiding significance for the construction of foundation treatment by dynamic compaction method.
1. Before operation, check that all system pipelines and joints shall be free of cracks, looseness and leakage, the mud scraper of the roller shall be flat and good, and all fastening bolts shall be free of looseness. It can be started only after it is confirmed to be normal.
2. Before starting, there shall be no obstacles and personnel around the machine.
3. During operation, repair or refueling is not allowed. When it is necessary to repair at the bottom of the machine, shut down the internal combustion engine, brake the machine with the brake and wedge the roller.
4. Change the forward or backward direction of the roller after the roller stops. It is strictly prohibited to use the reversing clutch for braking.
5. When rolling on the newly built road, it shall be rolled from the middle to both sides, and the distance from the subgrade edge shall not be less than 0.5m. When going uphill, the speed change shall be carried out after braking. When going downhill, it is strictly prohibited to slide out of gear.
6. When rolling the road near the mountain, roll from the inside to the outside. When rolling the second row, it is necessary to overlap half of the roller indentation.
7. When more than two machines operate at the same time, the front and rear distance shall not be less than 3m. Do not drive in columns on the ramp.
8. When the machine weight needs to be increased, yellow sand and water can be added to the roller. When the temperature drops to 0 ℃, it is not allowed to increase the weight with water.
9. Before the operation of the tire roller, check that the tire pressure shall meet the requirements to avoid operation on the large stone foundation layer.
10. When the roller is far away from the construction site, it shall be transported by car or flat trailer, and shall not be towed by other vehicles.
11. After dynamic compaction, the roller shall be parked in a flat and solid place and braked. It is not allowed to park on the edge of dirt road and slope, or in places that hinder traffic. In case of shutdown in severe cold season, the roller shall be padded up on the ground with wooden board.
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