Drilling Practice of Geotechnical Engineering Investigation for World Expo City in Qingdao

Abstract:

Combining with the drilling practice of the detailed investigation for geotechnical engineering of China Railway world expo city and the matching projects, in view of the complicated formations, serious mud leakage, drill pipe sticking and burying in the drilling process, some effective measures, such as wall protection with high quality mud, grouting, casing putting and drilling parameters optimization, are taken to improve the construction efficiency and reduce cost, and obvious technical results have been achieved.