While the present invention is placed and attached to a fixture as omni-directional flow at regular intervals in the rigid waterproof sheet that fixture minimization of the length 5 ~ 15cm and its purpose is to minimize the laying distance and increasing the shotcrete surface and rigid waterproof sheets, shotcrete laying distance of the surface and rigid waterproof sheet with respect to the surface area of the shotcrete surface in a minimized state Fold a strong local and other purposes as not to fall into the vagina of a waterproof sheet is due to be supplemented by the surface tension of the lack of water in the 1/2 sheet of allowing elongation of the waterproof sheet, omni-directional flow shotcrete surfaces is possible by fixing and the wide use of rigid waterproof sheet can be minimized by laying distance of the tarpaulin is available to the installation of a waterproof sheet efficiently and another joint locations can significantly reduce the local joints and also falling by the strong tension There is another purpose as to prevent. ; The present invention minimizes the laying distance of shotcrete surface and rigid waterproof sheet to be attached to the fixture as possible by all-round flow at regular intervals in the rigid waterproof tarpaulin sheet conforms to the curvature of the joint surfaces shotcrete one because it minimizes the deficiencies of the surface area of the water surface area and the high-pressure side of the lining sheet having a shotcrete concrete mortar injection due to localized strong tensile force is that the welded joint, as well as be able to minimize it takes the same weakened and which The adhesive joints because it is effective to prevent falling. ; If the surface area of the shotcrete and rigid waterproof tarpaulin sheet hayeoteodo minimize the distance still laid by the lack of all-round flow fixtures are available as described above, Since one-half of the allowable strain to be supplemented in a waterproof sheet for the effect that the joint part due to falling tarps to prevent localized strong tension. ; In addition, rigid waterproof sheet is fixed which means heat-sealed and is not only possible to use a wide sheet of water, so no manual intervention by heat-sealing fasteners because of this omni-directional flow is possible, unlike the shotcrete surface Because installation of the waterproof sheet is effective, it can also significantly reduce the joint portions can be reduced by a localized weakened joints strong tensile force. As this construction, as well as a fast and economical useful invention.
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