ブックタイトル「煉瓦造建造物の保存と修復」英語版

概要

「煉瓦造建造物の保存と修復」英語版

be necessary fn 4 .There may be issues in the fact that once these anchorsare inserted, they are almost impossible to remove andthere may be questions regarding durability of the insertedreinforcement. Also, there are chances of the drilling processdamaging the steel plates or plumbing within walls.The first case in which reinforcement with resin anchoringwas employed in restoration of an Important CulturalProperty was Former Yamagata Prefecture AssemblyHall (photo 9). In this structure, exterior buttresses wereinstalled, as has been earlier explained. Here, vertical holesof 12.3 m length were made in the walls by wet drilling.Later, in the restoration of Former Yamagata PrefecturalHall (photo 13), an Important Cultural Property adjacent tothe Assembly Hall, brick masonry arches of the hallway werereinforced by resin anchoring in both horizontal and verticaldirections. At Hakodate Orthodox Church restored in 1997(photo14), the brick wall and concrete reinforcement wereconnected together by resin anchoring fn 5 .In the 1995 restoration of Former Hong Kong ShanghaiBank Nagasaki Branch, an Important Cultural Property, theside parapets were reinforced with resin anchors and atFormer Yamaguchi Prefectural Assembly Hall (photo 15), anImportant Cultural Property restored in 2004, it also had itsbrick walls reinforced in the same way.In the restoration in 2013 of Chateau Kamiya Old WineryFacility / Office Building, an Important Cultural Property,holes were made in the brick walls to be inserted withstainless steel rods or aramid rods as tensile reinforcementand fixed with grout fn 6 . These holes were made by drydrilling.３.７. Pre-stressed Steel Bar ReinforcementIn this method, anchor plates for pre-stressed steel barsare first placed at the brick wall foundation. Holes are madefrom the top ends of brick walls, each inserted with a prestressedsteel bar which is attached to the anchor plate;these steel bars are stressed and fixed to the anchor platefor reinforcement. Holes are bored in the same manner asfor resin anchoring as described earlier.This method has advantages in that because resin or groutis not directly poured into the holes, when reinforcementneeds to be replaced, dismantlement of the brick walls canbe kept to a minimum. Also, if the walls are not thick enoughfor rod insertion, reinforcement can be attached on theoutside.There are issues in the fact that the pre-tensioned rodsneed to be checked that their tensile strength has notdecreased; if the top end of walls are not strong enough,a part of the wall may have to be replaced with reinforcedconcrete beams.In the structural reinforcement of Tokyo Prefecturedesignated cultural property Main Hall at Seisen Universityundertaken in 2010, pre-stressed steel bars were insertedinto holes in brick walls. These holes were made by drydrilling so that damage to exterior and interior finishes couldbe kept to a minimum (Mitsubishi Jisho Sekkei & TakenakaCorporation 2013, p90).Also, at Hokkaido Prefecture designated Kanemori RedBrick Warehouse (stores), to reinforce the second story brickphoto 13Former Yamagata Prefectural Hallphoto 14Hakodate Orthodox Churchphoto 15Former Yamaguchi Prefectural Assembly Hall27