電廠煙囪維修/煙囪防腐施工/2023已更新de 提升系統施工
操作平臺共兩層(ceng),下層(ceng)為砌磚扎筋用(yong),上(shang)層(ceng)為提升提板(ban)(ban)(ban),支設模板(ban)(ban)(ban),澆砼用(yong)。在(zai)操作臺上(shang)滿鋪50×300的木(mu)跳(tiao)(tiao)(tiao)板(ban)(ban)(ban),木(mu)跳(tiao)(tiao)(tiao)板(ban)(ban)(ban)與井(jing)架(jia)鋼管(guan)之(zhi)間(jian)(jian)用(yong)棕(zong)繩或8號鐵絲綁扎牢固,不能出現“瞎跳(tiao)(tiao)(tiao)”,板(ban)(ban)(ban)與板(ban)(ban)(ban)間(jian)(jian)要嚴密(mi)拼縫,木(mu)跳(tiao)(tiao)(tiao)板(ban)(ban)(ban)與鋼管(guan)間(jian)(jian)的大縫隙要用(yong)窄板(ban)(ban)(ban)條或鐵皮(pi)封死。
腳手架搭設順序(xu):放置縱(zong)向(xiang)掃地(di)桿(gan)(gan)→逐根豎立桿(gan)(gan),隨即(ji)用扣(kou)件(jian)與掃地(di)桿(gan)(gan)扣(kou)緊→橫(heng)(heng)(heng)(heng)向(xiang)掃地(di)桿(gan)(gan),隨即(ji)與縱(zong)向(xiang)掃地(di)桿(gan)(gan)扣(kou)緊→第一步(bu)縱(zong)向(xiang)水(shui)平(ping)桿(gan)(gan)→第一步(bu)橫(heng)(heng)(heng)(heng)向(xiang)水(shui)平(ping)桿(gan)(gan)→加拋(pao)撐(待首層外(wai)架子搭好后,裝設好兩(liang)道連(lian)墻(qiang)桿(gan)(gan)再(zai)拆除(chu))→第二步(bu)縱(zong)向(xiang),橫(heng)(heng)(heng)(heng)向(xiang)水(shui)平(ping)桿(gan)(gan)→第三步(bu)縱(zong)向(xiang)、橫(heng)(heng)(heng)(heng)向(xiang)水(shui)平(ping)桿(gan)(gan)→連(lian)墻(qiang)桿(gan)(gan)→橫(heng)(heng)(heng)(heng)向(xiang)支撐斜桿(gan)(gan)(從開始至頂(ding)層)→第四步(bu)縱(zong)向(xiang)橫(heng)(heng)(heng)(heng)向(xiang)水(shui)平(ping)桿(gan)(gan)→第五、六步(bu)縱(zong)向(xiang)、橫(heng)(heng)(heng)(heng)向(xiang)水(shui)平(ping)桿(gan)(gan)→連(lian)墻(qiang)桿(gan)(gan)→橫(heng)(heng)(heng)(heng)向(xiang)支撐斜桿(gan)(gan)→剪(jian)刀(dao)撐……
操作臺隨(sui)井架上(shang)升,所用(yong)木板準備(bei)三(san)套周(zhou)轉使(shi)用(yong)。作:筒(tong)身外模板采(cai)用(yong)2mm厚(hou),熱軋薄板制作,每(mei)張單塊模板按等腰梯形下(xia)料,單塊模板上(shang)邊(bian)(bian)寬1.487、下(xia)邊(bian)(bian)寬1.5m,高1.50m,用(yong)3mm厚(hou)、60mm寬連接板拼(pin)裝成形。
組裝:22塊數塊單體模板拼裝成整體4大塊,包裹于煙囪外壁。模板下邊緣與筒壁混凝土搭接50mm,搭接段模板外包箍2道φ9緊固鋼絲繩(間距為10mm),最低的一道鋼絲繩與模板下邊緣間距為10mm。搭接范圍以外的模板外壁包箍14道φ9鋼絲繩,間距100mm。整體模板收分與煙囪設計收分一致。
在井架中間偏心位置留出3.0m×3.0m的方孔,作料桶上下料通道,在中心位置留出0.2×0.2小孔,作為施工過程中測定筒身中心線的孔洞。制作1.2m×1.2m的封洞板,待料桶上到平臺后,用其封住洞口,便于卸料時放置手推車,及平時人員行走以確保安全。
井(jing)架上不(bu)設外圈平(ping)臺,緊固鋼(gang)絲繩(sheng)的人(ren)員只(zhi)在位于爬(pa)梯(ti)處(chu)進(jin)行緊固操作。支模(mo)及(ji)提升(sheng)模(mo)板時人(ren)均站在已綁扎好的環壁筋內(nei),不(bu)在外面施工。如砼出現表面質量(liang)問(wen)題需要(yao)處(chu)理時,人(ren)員在外掛爬(pa)梯(ti)上進(jin)行處(chu)理。