To provide a connection structure of a sheet to be buried capable of smoothly and securely inserting a newly buried sheet without being prohibited by soil or the like invading into a connection female part while holding a connected condition to an existing buried sheet adjacent to it.
A connection male part 18 is formed on one side edge of a sheet 17 to be buried. The connection male part 18 comprises a vertically extended pole-like insertion part 18D, and a pair of female end edge engagement parts 18B, 18B formed on the base end side of the pole-like insertion part 18D, and a vertically penetrating air supply passage 23 is formed through the pole- like insertion part 18D. A connection female part 19 has a pair of coupling groove forming plate parts 19B, 19B forked to form a vertical coupling groove in which the pole-like insertion part 18D is vertically inserted, and along end edges of the coupling groove forming plate parts 19B, counter engagement parts 19D to be inserted into female end edge engagement parts 18B of the connection male part 18 to be engaged are vertically formed.
Misawa, Hisashi
Tani, Toshio
Ito, Takashi
Matsui, Kenji
Minagawa, Shogo
Sano, Yukitoshi
Matsuoka, Toru
Yamada, Kazuhiko
Tsukamoto, Takuji
Ito, Takeshi
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