Application of “Integration into the Well Technology” in the Construction of Precipitation

West Beijing gravel stratum impact drilling technology is often used as well,along with large mechanical volume,long time into the hole,poor flushing quality,much impact on ground transportation,large impact on the environment from mud of the well."Well integrated into the technology" is introduced in this article.With the use of pneumatic Downhole Hammer drilling,it can follow up steel tube wells once well.This construction method has a high aperture efficiency,without preparation of mud,without special wash well,construction area of small,flexible features,especially in improving the environment and transport obvious advantages.This paper describes the application of the process of precipitation in Beijing subway project,discusses a comprehensive set of integrated technologies into the well,after nearly two years of construction practice,fully demonstrated the value of having an excellent reference for similar projects.