Title:
WATERPROOF SHEET FOR TUNNEL AND MANUFACTURING METHOD THEREOF
Document Type and Number:
Japanese Patent JP2023051185
Kind Code:
A
Abstract:
To provide a waterproof sheet for a tunnel including a three-dimentional mesh and excellent in processability of an attachment piece to be attached to a primary covering concrete surface of the tunnel, and a manufacturing method thereof.SOLUTION: The present invention relates to a waterproof sheet 1 for a tunnel including an impermeable layer 2, a permeable layer 3, a three-dimensional mesh 4, and an attachment piece 5 to be attached to a primary lining concrete surface of the tunnel, wherein the impermeable layer 2, the permeable layer 3 and the three-dimensional mesh body 4 are laminated in this order, and the three-dimensional mesh body 4 has a low basis weight zone at a central portion in a width direction, which has a lower basis weight than other parts, the attachment piece 5 is arranged on a surface on a side opposite to the permeable layer 3 of the three-dimensional mesh body 4, the attachment piece 5 and the permeable layer 3 are joined to each other with the three-dimensional net-like body 4 interposed therebetween, joining parts 7 exist parallel with a longitudinal direction of the waterproof sheet 1 for the tunnel, and a portion of the three-dimensional mesh 4 sandwiched by the joint parts 7 is located in the low basis weight zone.SELECTED DRAWING: Figure 1
Inventors:
WAKIZAKA KOJI
KIRIKAWA SHUICHI
OTSUBO DAISUKE
KIRIKAWA SHUICHI
OTSUBO DAISUKE
Application Number:
JP2021161713A
Publication Date:
April 11, 2023
Filing Date:
September 30, 2021
Export Citation:
Assignee:
DAIWA SPINNING CO LTD
International Classes:
B32B5/08; E21D11/38
Attorney, Agent or Firm:
Ikeuchi & Partners Patent Attorney Corporation