Pile-forming method by perforating with long screw and pumping concrete

Application Number: 00110560
Application Date: 2000.06.22
Publication Number: 1331365
Publication Date: 2002.01.16
Priority Information:
International: E02D5/36
Applicant(s) Name: Changchun Architectural Foundation Engineering Group Co.
Inventor(s) Name: Hu Yojngfu;Sun Hengzhan
Patent Agency Code: 22100
Patent Agent: zhao zheng
Abstract A pile-forming technology for the saturated or unsaturated clay or sandy stratum features that a long-screw drill with central tube is used to drill hole until the destination stratum, a high-pressure pump is then used to pump concrete into the drilled hole via the said central tube, and the drill rod is lifted up while the concrete is pumped into the hole to form a pile. Its advantages include no collapse and diameter decreasing, low noise, no pollution, high efficiency and high pile integrity.