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Working principle and application field of rotary drilling rig

In recent years, driven by the development of China's transportation industry, energy and construction industry, especially the construction of high-speed railway and urbanization, the construction of pile foundation continues to grow at a high speed, the infrastructure construction is booming, and there are more and more high, large and heavy construction projects.

In the pile foundation industry, based on the needs of bearing capacity of high-rise buildings, super high-rise buildings and large-scale bridges, as well as environmental protection (oil fume pollution, noise), vibration, construction quality, work efficiency and other factors, bored pile has gradually replaced precast pile and become the mainstream form of pile foundation.

Rotary drilling rig Rotary drilling rig is a kind of construction machinery which takes soil and forms holes. Because of its fast construction speed, high hole quality, small environmental pollution, flexible and convenient operation, high safety performance and strong applicability, it has been widely used in the hole forming operation of building foundation engineering, and has become the first choice of bored pile construction equipment.



working principle


Working device of rotary drilling rig: ① diesel engine provides power for hydraulic device. ② The working device includes drill pipe and drill bit to transmit downward pressure and forward and reverse rotation torsion. ③ The power of the working device is provided by the power head motor and the pressure winch motor. For example, Zoomlion zr360c-3a matches the dedicated hard rock deep pile construction equipment under high torque and pressure, which can effectively crush the rock stratum and drill.

When working, the main winch lifts and releases the drill pipe, and the power head presses down or rotates. The pressure and torque are transmitted to the bit through the drill pipe. The bit cuts the formation to realize drilling. When the slag in the bit is full, the drill bit and drill pipe are lifted out of the hole, and the drill bit is pushed down by the power head pressure plate to release the drill bit, and the slag is automatically poured out.

Compared with rotary drilling rig and percussion drill, the construction efficiency of rotary drilling rig is 15 to 20 times higher than that of rotary drilling rig.




Application field of rotary drilling rig


With the improvement of concrete quality, the improvement of pile foundation construction technology, the improvement of bearing capacity of cast-in-place pile, and the strict implementation of urban environmental regulations, bored pile almost replaced other drilling equipment.

Rotary drilling rig is generally suitable for clay, silt, sandy soil, muddy soil, artificial backfill contains some pebbles, gravel and other strata. For the rotary drilling rig with large torque power head, it can adapt to the construction of slightly weathered rock. With the development of product adaptability, design and construction technology, rotary drilling rig has a reliable and mature construction method in soft soil, hard rock, dense gravel, boulder and other complex strata. Due to a large number of highway and bridge, railway, water conservancy, urban construction and other engineering needs, rotary drilling rig has a huge market and development space.



Construction site of rig for Ruima machinery







The above is the site shooting of Ruima mechanical rotary drilling rig, which has won the unanimous recognition of each project team with its safe and efficient performance. Rotary drilling construction represents a safe, efficient, green and environmental protection construction technology. Compared with the successful methods of rotary drilling rig, impact drill and manual drilling, it successfully integrates the advantages of pile speed, high quality, safety and convenience, energy conservation and environmental protection.


In a word, rotary drilling rig represents a new construction technology, which has been widely recognized in the major projects in China. In terms of construction quality, construction efficiency, construction cost and geological adaptability, the advantages of rotary drilling rig are incomparable to those of impact drilling.



Ruima machinery has a variety of models External leasing of rotary drilling rig , excellent machine condition, own professional maintenance service team, guarantee your after-sales worry free, welcome to call 400-6969-733