Characteristics and Types of Rotary Drilling Rigs

The Characteristics of Pile Foundation Drilling Equipment

Rotary drilling rig as pile foundation drilling equipment generally adopts hydraulic crawler telescopic chassis, self-lifting and foldable drilling mast, telescopic drill rod, automatic vertical detection and adjustment, digital display of hole depth, etc. The whole machine operation generally adopts hydraulic pilot control and load sensing, which is easy and comfortable to operate. The main and auxiliary winches can be applied to the needs of various situations on the construction site. This type of drilling rig is suitable for dry (short spiral) or wet (rotary bucket) and rock formation (core drill) hole-making operations with different drilling tools. It can also be equipped with long spiral drills, underground continuous wall grabs, vibrating pile hammers, etc. to achieve multiple functions. It is mainly used for municipal construction, highway bridges, industrial and civil buildings, underground continuous walls, water conservancy, anti-seepage slope protection and other foundation construction.

Main Features of Pile Foundation Drilling Equipment

The main features of the rotary drilling rig include high efficiency, versatility, convenience of operation and safety. ‌The rotary drilling rig is a heavy equipment specially used for drilling and excavating soil. ‌ Its notable features are as follows: ‌

High efficiency and versatility: The rotary drilling rig can complete both drilling and excavation at one time without the need for additional auxiliary equipment, which significantly improves the operating efficiency. ‌ In addition, it is suitable for various types of soil, including clay, sand, pebble soil, etc., and can even work in extreme environments, such as steep cliffs and underwater construction. ‌

Easy to operate: The operation of the rotary drilling rig is relatively simple, and the main operations include taking off and landing, moving and turning, etc., which can be completed by only one operator. ‌ This type of equipment has a large deadweight, provides good stability, and adopts a variety of safety protection measures to ensure the safety of the operator. ‌

Types of Rotary Piling Rig

The principle of selecting a rotary drilling rig should be to meet the user’s main engineering needs and take into account possible engineering needs. Rotary drilling rigs can be divided into three types according to their main working parameters: torque, engine power, drilling diameter, drilling depth and overall weight of the drilling rig:

Small rotary drilling rig

Torque 100kN·m, engine power 170kW, drilling diameter 0.5~1m, drilling depth about 40m, overall weight of the drilling rig about 40t. Application market positioning of small machines:

(1) Slope protection piles of various building blocks;
(2) Partial load-bearing structural piles of buildings;
(3) Various piles with a diameter of less than 1m in urban transformation and municipal projects;
(4) Piles suitable for other purposes. The market workload coverage ratio of small pile foundation drilling equipment has reached more than 30%.

Medium rotary drilling rig

Torque 180kN·m, engine power 200kW, drilling diameter 0.8~1.8m, drilling depth about 60m, overall weight of the drilling rig about 65t.

The application market positioning of medium-sized machines:
(1) Bridge piles of various highways, railways and other transportation facilities;
(2) Load-bearing structure piles of large buildings and port terminals;
(3) Bridge piles of urban viaducts;
(4) Other applicable piles. The market workload coverage ratio of medium-sized machines reaches more than 90%.

Large rotary drilling rig

Torque 240kN·m, engine power 300kW, drilling diameter 1~2.5m, drilling depth 80m. The total weight of the drilling rig is more than 100t.

The application market positioning of large-scale pile foundation drilling equipment:
(1) Extra-large bridge piles of various highways and railway bridges;
(2) Special structural load-bearing foundation piles of other large buildings. The market workload coverage ratio of large-scale machines reaches more than 10%.

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