5. Rotary Drilling Rig

The rotary drilling rig is a construction machinery suitable for hole formation in building foundation engineering. It is mainly suitable for construction in sandy soil, cohesive soil, and silty soil layers. It is widely used for building multiple foundations, such as cast-in-place piles, continuous walls, and foundation reinforcement. The power output torque ranges from 120 to 400 kN·m, with a maximum hole diameter of 1.5 to 4m, and a maximum hole depth of 60 to 90m, meeting the requirements of various large foundation constructions. The rig typically adopts a crawler-type hydraulic telescopic chassis, a self-standing and folding drill rod, telescopic drill rod, can automatically detect and adjust verticality, and digitally visualize hole depth. It features lightweight operation and comfortable handling. The main and auxiliary winches are suitable for various situations on construction sites. Such rigs are suitable for different types of drilling tools, applicable for dry (short spiral drill) or wet (rotary drill bit) and rock layer (central drill) drilling operations. It can also be equipped with a long spiral drill, continuous underground wall grab, vibrating pile hammer, etc., to achieve multiple functions, mainly used for municipal buildings, roads and bridges, industrial and civilian buildings, underground continuous walls, water conservation, seepage prevention slope protection, and other foundation constructions. National experts believe that rotary drilling rigs will continue to have a large market in China in the coming years.

6. Down-the-Hole Drilling Rig

The essence of down-the-hole drilling is to immerse the impactor in the well during rock drilling to reduce the energy loss caused by the impact energy transmitted by the drill rod, thus minimizing the impact of drilling depth. The drilling machinery is divided into rock drills and drills, with drills further divided into outdoor and underground drills. In recent years, well-known foreign manufacturing companies have launched a series of new down-the-hole drilling products. These devices share the common feature of continuously increasing automation, with some functions employing intelligent GPS technology for automatic positioning of the pen, saving marking time and site positioning, and improving operational efficiency, allowing operators to focus on monitoring drilling progress. At the same time, there is increased emphasis on safety, environmental protection, and improving human-machine relations.

7. Horizontal Directional Drilling Rig

The horizontal directional drilling rig is a piece of construction machinery that can place various underground services (pipes, cables, etc.) without excavating the soil surface, widely used in water, electricity, telecommunications, natural gas, and oil pipeline construction. It is suitable for sand, clay, pebbles, and other ground conditions and can be used in most non-hard rock areas in China. Horizontal directional drilling technology is a new construction technology that combines the directional drilling technology of the oil industry with traditional pipeline construction methods. It is used in the installation of natural gas, electricity, telecommunications, gas, oil, and other pipelines.

8. Reverse Circulation Drilling Rig

The reverse circulation drilling rig is a drilling machine that uses a mud pump to vacuum the slurry that carries mineral debris away from the well bottom. The Zheng reverse circulation drilling rig is widely used in the construction of subway wells and high-rise building wells because it uses a mud wall to form holes, thus producing low noise during hole formation.

9. Impact Drilling Rig

The impact drilling machine is an important drilling machine used for constructing molten pile foundations on-site. The impact force of the drill bit is used to drill holes in rock layers. It can adapt to various geological conditions, especially effective in pebble layers. The impact type drilling machine is more adaptable than other types of drilling machines. At the same time, the hole made by the impact drilling machine forms a dense layer of soil around the hole wall after formation, playing a certain role in stabilizing the hole wall and improving the bearing capacity of the pile foundation.

10. Stone Crusher

In soft foundation treatment methods, a new construction method has emerged to replace vibratory crushed stone piles and the construction technology of vibratory underwater pipe compacted crushed stone piles. The chimney of the vibratory sinking stone crusher is equipped with a vibratory hammer, started by an electric motor. The vibratory force of the vibratory hammer is used to shake the sunken pipe into the ground. After reaching the level, pour concrete. The concrete is compacted to level by raising the grouting impeller elevator (hopper), while simultaneously filling, vibrating, and pulling the pipe. As a large stone crusher, the vibrant underwater stone crusher comes in several types, such as the walking pipe type, the walking type, and the caterpillar type. The power is usually 60, 75, 90, 110, 120, or even 150, depending on the chimney diameter, chimney length, and geological conditions. The compacted vibratory settlement stone pile has the characteristics of simple equipment, convenient operation, low cost, fast construction speed, and no pollution, and has been widely used in the treatment of soft foundations.