What Are The Pile Foundation Types of Rotary Drilling Rig Construction

In modern construction engineering, pile foundation is the key part of stable building foundation, its construction quality and selection type are very important. Rotary drilling rig is widely used in pile foundation construction by virtue of its high efficiency and precision. Next, we introduce the common pile foundation types of rotary drilling rig construction.

1. Reinforced concrete cast-in-place pile: This kind of pile is widely used. First, the rotary drilling machine is used to drill holes, then the steel cage is placed and the concrete is poured. It can withstand large vertical and horizontal loads, and is suitable for a variety of complex geological conditions.

2. Steel pipe pile: rotary drilling rig can drill first, and then sink the prefabricated steel pipe into the hole. Steel pipe pile has the characteristics of high strength and fast construction speed, and is often used in wharfs, Bridges and other projects that require high foundation stability.

3. Wooden piles: will be used in some small buildings or areas with high environmental protection requirements and relatively soft geological conditions. After the rotary drilling machine is drilled, the wooden pile is convenient to use materials, but the durability is relatively weak.

4. Lime soil compaction pile: the hole is formed by rotary drilling rig, and then the lime soil is filled into the hole in layers and compacted. It can effectively improve the bearing capacity of foundation soil and reduce foundation settlement, and is often used to treat collapsible loess and other foundations.

5.CFG pile: that is, cement fly ash rubble pile. After drilling, the rotary drilling rig will be filled with cement, fly ash, gravel and other mixed materials into the hole. CFG pile can significantly improve the bearing capacity of the foundation, which is common in the foundation treatment of high-rise buildings.

6. Expanding pile bottom: rotary drilling rig first normal drilling to the design depth, using special devices to expand pile bottom. The enlarged pile bottom can increase the contact area between pile and foundation soil, improve the bearing capacity of pile, and is often used for large building foundations.

In short, the pile foundation types that can be constructed by rotary drilling rig are rich and diverse, covering different materials and different structural forms. Construction personnel should reasonably select the type of pile foundation according to the actual needs of the project, geological conditions and other factors, give full play to the advantages of rotary drilling rig, and ensure that the building foundation is stable and reliable.