Compared with Rotary Drilling RIGS

In the pile foundation construction of building projects, rotary drilling RIGS and screw drilling RIGS are both commonly used equipment. Although both are used for drilling operations, they have obvious differences in many aspects. Now, let's take a detailed look at the differences between rotary drilling RIGS and spiral drilling RIGS.

1. Structural design: The structure of the helical drilling rig is relatively simple, usually composed of drill pipes and helical drill bits. It is easy to install, only requiring the connection of the drill pipe to the power head. The components of the rotary drilling rig are more complex. Its drill pipe adopts a multi-layer telescopic design, allowing it to reach the position in one step during operation without the need for frequent connection of drill pipes as in the case of the rotary drilling rig.

2. Power source: The screw drill rig relies on hydraulic power output, featuring high operational flexibility. It can stop and go immediately. Moreover, the powerful power output by the high-pressure oil cylinder can accelerate the drilling speed, and its efficiency is much higher than that of manual operation. Rotary drilling RIGS mainly rely on diesel engines for power output, providing power support for drilling and movement. They adopt a crawler walking system and are generally modified from excavators.

3. Stratum adaptability: The helical drilling rig is highly efficient in homogeneous strata with an N value of no more than 30. For instance, in the construction of pile holes with a diameter of 800mm, it can complete 3 to 4 holes per hour. However, once encountering groundwater or quicksand layers, it is very likely that the hole will collapse. At this time, it is necessary to use it in conjunction with a casing. Rotary drilling RIGS have stronger adaptability and adopt mud wall protection technology, which can effectively deal with quicksand layers. By replacing different types of drill buckets, such as double-bottom sand hopper and toothed sand hopper, it can adapt to various complex strata and even complete pile foundation construction with a diameter of 2.5 meters in the weathered rock layers on the seabed.

4. Drilling capacity: The screw drill rig is relatively limited in terms of drilling diameter and depth, and is generally suitable for the construction of shallower and smaller-diameter pile holes. The rotary drilling rig has a powerful drilling capacity. Its multi-section drill pipe design can achieve ultra-deep hole formation of 60 meters or even deeper, and the maximum hole diameter can reach 1.5 to 4 meters, which can meet the requirements of various large-scale foundation construction.

5. Construction efficiency: In suitable homogeneous layers, the efficiency of the rotary drilling rig is relatively high. For instance, it only takes 20 minutes to make a hole in plain fill soil 15 meters deep. However, when encountering complex strata, its efficiency will drop significantly. In contrast, rotary drilling RIGS, with their powerful performance and efficient operation mode, have a higher overall construction efficiency, especially in the construction of large-diameter, deep holes and complex strata, where their advantages are more obvious.

6. Application scenarios: The screw drill rig is mainly applied in small-scale engineering scenarios such as landscaping, pole drilling, road sign installation, photovoltaic ground nails, detection and research. Rotary drilling RIGS are widely used in large-scale foundation construction projects such as high-rise buildings in cities, railways, highways, Bridges, continuous walls, and foundation reinforcement.

To sum up, rotary drilling RIGS and screw drilling RIGS each have their own characteristics. Rotary drilling RIGS, with their complex structural design, demonstrate powerful advantages in terms of power, stratum adaptability, drilling capacity, construction efficiency and application scenarios, and are particularly suitable for large and complex projects. The auger drill, with its simple structure and high efficiency in specific homogeneous layers, plays a significant role in small-scale projects. In actual engineering, it is necessary to rationally select the appropriate drilling rig based on specific geological conditions, project scale and requirements, etc., to ensure the smooth progress and efficient completion of the construction.