| 摘要 |
PROBLEM TO BE SOLVED: To provide a timbering body for use in executing secondary lining by covering primary lining of a tunnel with a synthetic resin lining material, and filling a gap between the lining material and the primary lining with an infilling material such as cement milk, wherein the timbering body positively achieves timbering over the entire inner peripheral surface of the lining material, and facilitates its disassembling and transportation. SOLUTION: The timbering body consists of an upper bed timbering member, both side timbering members, and a lower section timbering member which are each formed of an arcuately curved rectangular frame body. The lower section timbering member has skin plates stretched thereon to protect the lining material, and both the side timbering members are foldably connected to both lower edges of the upper bed timbering member. Then spuds each having its tip received by the primary lining via an insertion hole formed in the lining material, is detachably attached to the timbering member, to thereby prevent the lining material from lifting due to liquid pressure of the infilling material. COPYRIGHT: (C)2005,JPO&NCIPI
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