分(fen)類:公(gong)司新聞發布時(shi)間:2016/08/03
招數一
基(ji)礎地(di)梁墊(dian)(dian)(dian)層基(ji)礎地(di)梁磚(zhuan)胎模(mo)(mo)應在(zai)(zai)澆筑(zhu)混(hun)凝(ning)土(tu)墊(dian)(dian)(dian)層后砌(qi)筑(zhu)。嚴禁先(xian)砌(qi)磚(zhuan)模(mo)(mo),后在(zai)(zai)磚(zhuan)模(mo)(mo)內澆筑(zhu)混(hun)凝(ning)土(tu)墊(dian)(dian)(dian)層。
招數二
結構(gou)底(di)板墊(dian)(dian)(dian)(dian)層澆筑的(de)混(hun)凝(ning)(ning)土(tu)墊(dian)(dian)(dian)(dian)層前應(ying)將素土(tu)夯實,測好(hao)標高,確(que)保墊(dian)(dian)(dian)(dian)層的(de)厚(hou)度,澆筑的(de)墊(dian)(dian)(dian)(dian)層混(hun)凝(ning)(ning)土(tu)應(ying)確(que)保強(qiang)度和平整度,防止墊(dian)(dian)(dian)(dian)層混(hun)凝(ning)(ning)土(tu)因墊(dian)(dian)(dian)(dian)層底(di)部下沉、混(hun)凝(ning)(ning)土(tu)墊(dian)(dian)(dian)(dian)層厚(hou)度不(bu)夠(gou)或(huo)墊(dian)(dian)(dian)(dian)層混(hun)凝(ning)(ning)土(tu)強(qiang)度不(bu)夠(gou)而造成墊(dian)(dian)(dian)(dian)層下沉、開裂(lie)。
招數三
施工(gong)縫與后(hou)澆(jiao)(jiao)帶的(de)(de)留(liu)置(zhi)(zhi)施工(gong)縫和后(hou)澆(jiao)(jiao)帶的(de)(de)留(liu)設位置(zhi)(zhi)應在混(hun)凝土澆(jiao)(jiao)筑前確(que)定(ding)。施工(gong)縫和后(hou)澆(jiao)(jiao)帶宜留(liu)設在結(jie)構受剪(jian)力較(jiao)小(xiao)且便于施工(gong)的(de)(de)位置(zhi)(zhi)。
受力(li)復雜的結(jie)(jie)構(gou)(gou)構(gou)(gou)件(jian)或(huo)有防水抗滲要(yao)求的結(jie)(jie)構(gou)(gou)構(gou)(gou)件(jian),施(shi)工縫(feng)留(liu)(liu)設(she)位置(zhi)應(ying)經設(she)計單位確認。施(shi)工縫(feng)、后澆(jiao)帶留(liu)(liu)設(she)界面(mian),應(ying)垂(chui)直于結(jie)(jie)構(gou)(gou)構(gou)(gou)件(jian)和縱(zong)向受力(li)鋼筋。
結構(gou)構(gou)件厚(hou)度(du)或(huo)(huo)高(gao)度(du)較大時。施(shi)工縫或(huo)(huo)后澆帶(dai)界面宜采用(yong)專用(yong)材料封(feng)擋。
招數四
混凝(ning)(ning)土(tu)收(shou)(shou)面(mian)混凝(ning)(ning)土(tu)澆完后,分兩(liang)次收(shou)(shou)面(mian),后一次收(shou)(shou)面(mian)在(zai)混凝(ning)(ning)土(tu)接(jie)近初凝(ning)(ning)時,將(jiang)面(mian)層拉毛,防止(zhi)表面(mian)的(de)收(shou)(shou)縮裂紋。
表面(mian)平(ping)整度允(yun)許偏差 8mm。注意柱、剪力墻(qiang)部位要(yao)進行鑿毛處理。宜在混凝土(tu)接近初凝的時間(jian),二(er)次(ci)壓(ya)光后,表面(mian)用膠(jiao)掃把或海綿(mian)條拉毛成型(xing)。
招數五
樓地面(mian)的(de)高(gao)低差(cha)(cha)樓地面(mian)高(gao)差(cha)(cha)部(bu)位(wei)吊(diao)模(mo)宜采用型(xing)鋼做(zuo)可拆(chai)式定型(xing)模(mo)板,高(gao)低差(cha)(cha)部(bu)位(wei)的(de)拆(chai)模(mo)時間必須控制(zhi)好(hao),不得過早拆(chai)除模(mo)板,且拆(chai)模(mo)后要做(zuo)好(hao)成品保護,防(fang)止(zhi)高(gao)低差(cha)(cha)部(bu)位(wei)混凝土缺棱(leng)掉角(jiao)。
招數六
混(hun)(hun)凝(ning)土修補混(hun)(hun)凝(ning)土拆模后,應有施(shi)工單位(wei)(wei)、監理(li)(建(jian)設)單位(wei)(wei)對(dui)外觀質量(liang)和(he)尺寸偏(pian)差進(jin)行(xing)檢查(cha),并做記錄。對(dui)已出現(xian)的嚴重缺(que)陷,應有施(shi)工單位(wei)(wei)提出技術(shu)處(chu)理(li)方案,并經(jing)監理(li)(建(jian)設)單位(wei)(wei)認可后進(jin)行(xing)處(chu)理(li)。
嚴禁施工(gong)單位(wei)私自修(xiu)補。對經處(chu)理(li)的(de)(de)部位(wei),應重新檢查驗收(shou)。混凝土的(de)(de)修(xiu)補要有修(xiu)補記(ji)錄,注明處(chu)理(li)部位(wei)、質(zhi)量缺陷(xian)問(wen)題、修(xiu)補方法、修(xiu)補時間、修(xiu)補前的(de)(de)照片,并(bing)應由施工(gong)單位(wei)質(zhi)檢員、甲(jia)方工(gong)程部管理(li)人員共同(tong)簽字確認,并(bing)貼在混凝土缺陷(xian)的(de)(de)修(xiu)補部位(wei)。
招數七
混(hun)凝(ning)土的振(zhen)搗混(hun)凝(ning)土振(zhen)搗必(bi)須(xu)(xu)按施(shi)工(gong)(gong)(gong)方案操作,并加強旁站(zhan)監督,嚴禁漏振(zhen)。大體(ti)積(ji)混(hun)凝(ning)土施(shi)工(gong)(gong)(gong)必(bi)須(xu)(xu)報專(zhuan)項(xiang)施(shi)工(gong)(gong)(gong)方案,待(dai)審批(pi)后方可(ke)施(shi)工(gong)(gong)(gong)。
樓、地面(mian)混(hun)凝土必須(xu)用(yong)平板振動(dong)器振搗(dao)密實,不(bu)得只用(yong)振動(dong)棒振搗(dao),而不(bu)用(yong)平板振動(dong)器振搗(dao)。坡屋面(mian)用(yong)附(fu)壁式振動(dong)器振搗(dao)。
招數八
混(hun)凝土(tu)(tu)(tu)養護混(hun)凝土(tu)(tu)(tu)澆(jiao)筑完畢(bi)后的(de)12h以內按施工技術(shu)方(fang)案應(ying)對(dui)混(hun)凝土(tu)(tu)(tu)加以覆蓋并保濕養護;對(dui)采用硅(gui)酸(suan)鹽(yan)(yan)水泥、普(pu)通硅(gui)酸(suan)鹽(yan)(yan)水泥或礦(kuang)渣硅(gui)酸(suan)鹽(yan)(yan)水泥拌(ban)制的(de)混(hun)凝土(tu)(tu)(tu)澆(jiao)水養護,不(bu)得少于7d;
對摻用(yong)緩凝(ning)型外(wai)加劑或有抗滲要求的(de)混(hun)凝(ning)土(tu),澆(jiao)水(shui)養護,不(bu)得少(shao)于14d;澆(jiao)水(shui)的(de)次數應能保(bao)持混(hun)凝(ning)土(tu)處于濕潤狀態;混(hun)凝(ning)土(tu)養護用(yong)水(shui)應與拌制用(yong)水(shui)相同(當日平均溫(wen)度低于50℃時,不(bu)得澆(jiao)水(shui))。采用(yong)塑料(liao)布覆(fu)蓋養護的(de)混(hun)凝(ning)土(tu),其(qi)敞露的(de)全部表面(mian)應覆(fu)蓋嚴密,并保(bao)持塑料(liao)布。