Title:
VACUUM GROUT INJECTION METHOD
Document Type and Number:
Japanese Patent JP2016196779
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a vacuum grout injection method which can inject grout without causing separation and clogging of the grout during filling and which can inject grout in every corner of a sheath pipe without causing an insufficient charge of the grout so as to improve durability of a PC structure.SOLUTION: A vacuum grout injection method comprises: a vacuum step of reducing the pressure inside a sheath pipe S2 to a predetermined vacuum pressure by a vacuum pump 2 communicating with the sheath pipe S2; an injection step of injecting grout by negative pressure and a head difference by vacuum from a grout chamber 3 communicating with the sheath pipe S2 to the inside of the sheath pipe S2, after the work of the vacuum step; and a press fitting step of pressing the grout into the sheath pipe by a press fitting pump 4 communicating with the sheath pipe S2 after the injection flow rate of the grout comes to a predetermined flow rate or lower in the injection step.SELECTED DRAWING: Figure 1
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Inventors:
UEHIGASHI YASUSHI
KUMAGAI SHINICHIRO
FUJITA KOJI
SHOJI AKIO
WATASE HIROSHI
NISHISU MINORU
KUMAGAI SHINICHIRO
FUJITA KOJI
SHOJI AKIO
WATASE HIROSHI
NISHISU MINORU
Application Number:
JP2015077564A
Publication Date:
November 24, 2016
Filing Date:
April 06, 2015
Export Citation:
Assignee:
CENTRAL NEXCO TECHNICAL MARKETING CO LTD
ORIENTAL SHIRAISHI CORP
ORIENTAL SHIRAISHI CORP
International Classes:
E04G21/12; E01D1/00
Attorney, Agent or Firm:
Yasuhiko