END PART TREATMENT TOOL FOR LINING CONCRETE AND ITS CONSTRUCTION METHOD

摘要

PROBLEM TO BE SOLVED: To provide an end part treatment tool for lining concrete free to easily set and favourable in adhesion, and its construction method. SOLUTION: An end part treatment tool of lining concrete is to set on an end part of a form of lining concrete in the case of depositing it on the inside of primary lining of a tunnel by dividing lining concrete in the axial direction. A construction method of lining concrete constitutes a characteristic feature of injecting gas etc., in a hollow mat overhung to the lining concrete undeposited side from the form, making the hollow mat contact with the inside of primary lining before lining concrete deposition and depositing concrete in the neighbourhood of an end part on the lining concrete undeposited side of the form. Additionally, it constitutes another characteristic feature of overhanging the hollow mat from the end part of the existing lining concrete side of the form, making the hollow mat contact with the existing lining concrete and depositing concrete on a connecting part with the existing lining concrete.