In recent years, through extensive engineering practice and repeated experimental research, a long spiral rock drilling bit was designed, and a construction method was provided. This method solved the issue of long screw bits not being able to embed in rock and introduced a new rapid drilling construction technology & long spiral drilling pile technology. Engineering practice has fully demonstrated the following features:

(1) The long spiral drilling machine bit is used for geotechnical drilling, eliminating the need to change bits and combining with high axial pressure water drilling, resulting in fast construction speed and high efficiency.

(2) Relying on the "drilling pressure piling" technology, piles can be completed in one go without the need for mud protection or clearing sediment at the bottom of the hole. This simplifies the process flow, accelerates the speed of pile formation, ensures pile foundation quality, increases single pile bearing capacity, and reduces costs.

(3) Based on engineering experience, a set of drilling parameters and actual rock embedding control standards have been summarized. These can be used to identify and compensate for the limitations and errors of geological survey reports, ensuring the reliability and accuracy of pile foundation rock embedding.