承重牆體拆除技術
發布時間:2014-08-05
托梁拆牆工作程序
托梁拆牆是一門較為複雜的新興技術。其工作程序如下:
1、增設新的結構傳力體係;
2、對保留結構進行補強加固;
3、對受力較大的拆除結構進行卸荷,初步實現力的轉換;
4、按順序逐步拆除牆體,實現力的完全轉換;
5、裂縫修補及結構裝修。
新增傳力結構施工
xinzengchuanlijiegou,youqishishangbuzonghengkuangjialiang,shizaiyuanyoumoshengjiegouweichaichuqingkuangxiajinxingde,xinjiegouweizhijiqishigongkongjianbeiyuanyouqiangtisuozhanju,ruhebaozhengxinzengjiegoudeshigongzhiliangyijixinjiegouyubaoliujiegoudezhengtilianjie,shijiegoushigongbixujiejuedeyigeguanjianwenti。anshejiguiding,xinzengjiegoudezonghengkuangjiaquanbucaiyongzuheshijiabanshuangliang,weibaozhengzuheliangdezhengtishouli,bujinzhuibanhuogujinxuzuankongchuanqianghanjiechengbihehuilu,erqieshangxumeige1000mm,開槽澆注混凝土連結銷鍵。此孔和槽較密,不宜人工打鑿,應采用機械鑽孔,以免對保留結構造成過大損壞。
xinggangkuangjiazhudeshezhi,suikecaiyongjubuqiechuzonghengqiangqitidedakaitangfangshishigong,danqiekaihoudezonghengyouyushiqulehengqianglajie,gaohoubiyanzhongchaobiao,weibaozhengwaizongqiangzaishigongzhongdewending,linshicaiyongjiaogangyuhengqianglajie。liangzhuxingganggujiabicijiandelianjieyijigangjingujiayujiedianbanjiandelianjie,quanbucaiyonghanjie。
由於工作條件所限,閉合框架混凝土振搗較為困難,本次采用了C30高流動性樹脂混凝土。上部縱橫框架係從樓板上局部鑿孔澆灌混凝土。鋼管混凝土柱的節點布筋及混凝土澆灌方法,係按《鋼管
混凝土結構設計與施工規程》CECS28:90進行。
保留牆體加固
anshejiyaoqiu,sancengyixiabaoliuqiangti,quanbucaiyonggangjinwangshuinishajiangcengjiagu,cijiagucengjianfuzhejiangwaiqiangyukuangjiazhujieweiyiti,jiangneiqiangyukuangjialianglianjiezuheweidaxingqiangliangdezuoyong。weizengqiangjiagucengyuzhuanqiangjicengjiandejiehenengli,xiantichuqiangmianjiumohuiceng,qingsaoganjing,zaipentusushuinijiangyidao。gangjinwangyuqiangticaiyong6S型拉結筋連接錨固,加固層砂漿采用噴射法施工。
拆牆及力的轉換
當新增傳力結構及保留加固結構混凝土。砂漿強度達到設計要求時,即可開始拆除應拆牆體。