Opening the horizon: the construction process of the dynamic compaction machine

The effect of the dynamic compaction machine appears when the construction works are compacted with soil. According to the different working conditions, the type of the rammer used is different.

Opening the horizon: the construction process of the dynamic compaction machine

There are many kinds of dynamic compaction machine, a frog, a vibration type, a step step, ramming, and hanging hammer hammer type.

Before construction, the location and standard of underground structures and underground pipelines should be identified, and necessary measures should be taken to avoid damage due to construction.

First judge the equipment and construction project at the beginning of the construction

The quality of the dynamic compaction hammer can be 10 ~ 40t. The bottom surface should be circular or polygonal. The area of the hammer bottom should be determined according to the nature of the soil. The value of the static grounding pressure of the hammer bottom can be 25 to 40kPa. For the fine grained soil, the static grounding pressure should be taken for a smaller value. The bottom of the hammer should be symmetrically set up a number of vent holes which are connected to the top surface, and the aperture is 250 ~ 300mm. The value of the static ground pressure of the dynamic compaction replacement for the bottom of the hammer is 100 ~ 200kPa.

The construction machinery should adopt a crawler crane or other special equipment with automatic decoupling device. When a crawler crane is used, an auxiliary door frame can be set at the end of the arm, or other safety measures are taken to prevent the overturning of the frame when the hammer is falling.

How can the local topsoil be weak or the water level is high

High spot surface weak soil or groundwater, tamping pit water affects the construction, should adopt the loose material artificial lower underground water level or the filling of a certain thickness, the underground water level is lower than the bottom surface below 2m. The accumulation of water in the pit or site should be eliminated in time.

On the environmental protection of construction

When the vibration generated by dynamic compaction has a harmful effect on adjacent buildings or equipment, monitoring points should be set up, and vibration isolation or vibration control measures should be taken to eliminate harmful effects of dynamic compaction on adjacent buildings.

In a word, when we are ramming the construction site, we should understand the performance of the surrounding environment and equipment.