Analysis of Pile Foundation Types for Rotary Drilling RIGS

Rotary drilling RIGS are widely used in pile foundation construction due to their high efficiency and flexibility. Different types of pile foundations are suitable for different engineering requirements. Understanding their classification and characteristics can better leverage the construction advantages of rotary drilling RIGS.

1. Concrete cast-in-place piles: Formed by pouring concrete after drilling holes with rotary drilling RIGS, they are suitable for most soil layers. During construction, the verticality of the hole formation should be controlled to prevent the pile body from shifting and affecting the bearing capacity.

2. Reinforced concrete piles: By adding a steel frame to the concrete cast-in-place pile foundation, the shear and bending resistance of the pile body is enhanced. It is mostly used in high-rise buildings, Bridges and other projects with high requirements for the strength of pile foundations.

3. Plain concrete piles: Made solely by pouring concrete, they have a relatively low cost and are suitable for low-rise buildings with smaller loads or foundation reinforcement. After the rotary drilling rig completes the hole, it can be directly injected, and the construction process is simple.

4. Rock-socketed piles: The bottom of the pile body is embedded in the rock layer to a certain depth, which can effectively transfer loads and is suitable for sites where the rock layer is buried relatively shallowly. During construction, the depth of rock embedding must be precisely controlled to ensure the stability of the pile foundation.

5. Expanded bottom pile: The diameter of the pile bottom is expanded through special processes to increase the force-bearing area and enhance the bearing capacity of a single pile. Rotary drilling RIGS can be used in conjunction with dedicated bottom-expanding drill bits for construction and are suitable for soft soil foundations.

6. Immersed tube cast-in-place piles: By using rotary drilling RIGS to assist in the formation of immersed tube holes, the risk of hole collapse is reduced. They are suitable for easily collapsed strata such as quicksand and silt. After the holes are formed, concrete should be poured quickly to prevent the hole walls from becoming unstable.

In conclusion, the types of pile foundations constructed by rotary drilling RIGS are diverse, each with its own suitable scenarios and key construction points. To ensure the quality of pile foundations and the safety of the project, it is necessary to select the appropriate type of pile foundation based on engineering geology, load requirements, etc., and cooperate with standardized construction.