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Copyright of Feed Industry is the property of Liaoning Provincial Institute of Agricultural Mechanization and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The 360 degree rotator drill is suitable for complex geological situations, which has the advantages of better verticality and convenient construction relative to traditional rotator drill and impact drill. Through the application of water stop secant pile construction in Dalian Bay subsea tunnel prefabricated yard, the 360 degree rotator drill can drive the sleeve to rotate 360 degree, and the pressing the casing and excavating can construct at the same time, without relying on the retarder to control the concrete strength, and it hasn't happened that the II-order secant pile construction couldn't be carried out because the concrete strength of I-order pile is too high due to the excessive pile time of single pile. The construction efficiency and quality of the secant pile are all met the relevant requirements. [ABSTRACT FROM AUTHOR]

Copyright of China Harbour Engineering is the property of Editorial Office of China Harbour Engineering and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)