High limit rotary drilling: what are the characteristics of the method of rotary drilling rig?

Rotary drilling rig as a new type of basic engineering machinery, after several years of popularization and application, has been widely used in highway, railway, bridge, water conservancy and urban construction projects and other pile foundation projects. Because of its high efficiency, energy saving, low noise, low pollution and wide adaptability, it is favored by more and more construction units. The rotary drilling rig is effectively used for the construction of dry bored piles, and the construction technology and management specifications of dry bored piles are discussed and summarized. So, high rotary drilling: what are the characteristics of the method of rotary drilling rig?

High limit rotary drilling: what are the characteristics of the method of rotary drilling rig?

1. When drilling, the hydraulic cylinder on the slide of the drilling frame can be used to pressurize downward to speed up the drilling speed.

2. This drilling method is through the box-type anti-torsion drill mast and rotary power head (KDK) to drive a variety of drilling tools into holes. Full hydraulic crawler crane, crawler retractable, moving and positioning is very convenient.

3. The weight of the equipment, the power configuration of the whole machine and the output capacity of the main actuator are large, which can meet the construction needs of some special projects in special fields. Adapt to the increasing difficulty of engineering construction, quality and efficiency requirements continue to improve the reality.

4. The operation and control of the equipment adopts the integration of electromechanical and hydraulic, which improves the reliability and flexibility of the equipment operation. For example, the automatic display system of computer automatic inclinometer plays an important role in improving the efficiency and accuracy of hole forming.

5. The telescopic active drill pipe greatly reduces the auxiliary operation time, and can be replaced in time according to the formation changes, creating conditions for selecting the appropriate drill bit type.

6. Less mud discharge is conducive to environmental protection.

7. It is convenient to spoil the soil, and the excavated soil slag can be transported directly by car to reduce the mud on site.

8. Dig directly and dump automatically. No manual cooperation is required to open the barrel door of the barrel drill.

9. Lifting bit, liner, etc. No need to cooperate with the crane.

Limit height rotary excavation:Rotary drilling rig should pay attention to what construction safety problems?

1. The operation of the rotary drilling rig shall strictly comply with the operation regulations.

2. When encountering stormy weather, special attention should be paid to the construction, especially when the wind speed reaches 20 m/s, measures should be taken to stop drilling, put the drill bit or load on the ground, and move the power head drive to the lower part of the mast.

3. When working on a slope above 10 degrees, do not turn the machine, turn or drive in a T-shaped direction on the slope to avoid the danger of rollover.

4. Protective measures such as springboard cushion layer or fence shall be taken for pile holes that are not poured.

5. If the slope of the upper and lower ramps of the drilling rig exceeds the allowable range, the upper and lower ramps should be removed.

6. Confirm that there are no cables, optical cables, underground pipelines and other buried objects. At the construction site, the equipment installation distance from the high-voltage line shall not be less than 25m.

7. Multiple drilling rigs, cranes, pump trucks, etc. When working adjacent or close to the same place, measures should be taken to prevent equipment and personnel from being injured.

8, in the special soft ground walking and drilling, should use steel roadbed box.