JPH0262937U

JPH0262937U -

Info

Publication number: JPH0262937U
Application number: JP14111688U
Authority: JP
Priority date: 1988-10-31
Filing date: 1988-10-31
Publication date: 1990-05-10

Description

[Brief explanation of drawings]

第１図は、この考案を実施した二重管の打設し
た状態を示す断面図、第２図は第１図のＡ部の拡
大断面図である。１……外管、１ａ……先端内壁面、２……内管
、４……シール材、５……スペーサ、５ａ……テ
ーパ部、Ｈ……間隙、Ｑ……一次グラウト。 FIG. 1 is a cross-sectional view showing the installed state of a double pipe embodying this invention, and FIG. 2 is an enlarged cross-sectional view of section A in FIG. 1. DESCRIPTION OF SYMBOLS 1...Outer tube, 1a...Tip inner wall surface, 2...Inner tube, 4...Sealing material, 5...Spacer, 5a...Tapered portion, H...Gap, Q...Primary grout.

Claims

[Scope of utility model registration request]

A sealing material made of an elastic material is provided on the inner wall surface of the distal end of the outer tube so as to be in sliding contact with the outer circumferential surface of the inner tube inserted into the center of the outer tube at a predetermined gap, and in the gap between the outer tube and the inner tube, In a double-pipe seal structure in which grout is injected and cured, when the primary grout is placed above the sealing material provided on the inner wall surface of the tip of the outer pipe and in the gap between the outer pipe and the inner pipe, A double-pipe seal structure characterized in that a plurality of fin-shaped spacers having tapered portions on the upper end side are protruded at a predetermined interval at a position to be buried with the primary grout.