常用的幾(ji)種建筑加(jia)固方法和優點
1、粘(zhan)鋼加(jia)固技術適用(yong)(yong)(yong)于承(cheng)受(shou)靜(jing)力作(zuo)用(yong)(yong)(yong)的一(yi)般(ban)受(shou)彎(wan)(wan)及受(shou)拉構(gou)件(jian)(jian)。加(jia)固后的構(gou)件(jian)(jian)重量(liang)增加(jia)或(huo)(huo)減少;同時不影(ying)響構(gou)筑(zhu)物的使用(yong)(yong)(yong)凈(jing)空,不改(gai)變(bian)構(gou)件(jian)(jian)外形;且(qie)連接處受(shou)力均勻,不會產(chan)生(sheng)應力集中(zhong)。粘(zhan)貼(tie)鋼板(ban)加(jia)固施工快(kuai)速(su)、現場無濕(shi)作(zuo)業(ye)或(huo)(huo)僅有抹灰(hui)等少量(liang)濕(shi)作(zuo)業(ye),對生(sheng)產(chan)和生(sheng)活(huo)影(ying)響小,且(qie)加(jia)固后對原結構(gou)外觀和原有凈(jing)空無顯(xian)著影(ying)響,但(dan)加(jia)固效果在很大程度上(shang)取決于膠粘(zhan)工藝與操作(zuo)水平(ping);適用(yong)(yong)(yong)于承(cheng)受(shou)靜(jing)力作(zuo)用(yong)(yong)(yong)且(qie)處于正常濕(shi)度環境中(zhong)的受(shou)彎(wan)(wan)或(huo)(huo)受(shou)拉構(gou)件(jian)(jian)的加(jia)固。
特點:施工(gong)簡便,快捷,不影響結(jie)構(gou)外形;加固后(hou)占(zhan)用(yong)空間小(xiao)(xiao),不影響室內(nei)正(zheng)常(chang)使用(yong)功(gong)能;養護(hu)周期短,常(chang)溫(wen)下24小(xiao)(xiao)時(shi)可拆(chai)除夾(jia)具(ju)或支撐(cheng),3天后(hou)可受力(li)使用(yong);適用(yong)范圍:環境溫(wen)度小(xiao)(xiao)于60℃,相對濕度70%,無化學腐(fu)蝕;粘結(jie)鋼板厚(hou)度2-6㎜為(wei)宜。
纖(xian)(xian)維(wei)(wei)(wei)類加(jia)(jia)固(碳(tan)纖(xian)(xian)維(wei)(wei)(wei)布、碳(tan)纖(xian)(xian)維(wei)(wei)(wei)板、芳倫纖(xian)(xian)維(wei)(wei)(wei)及(ji)玻璃纖(xian)(xian)維(wei)(wei)(wei))修復(fu)混(hun)凝(ning)土(tu)(tu)結(jie)構技術是采(cai)用(yong)配套粘(zhan)結(jie)樹脂(zhi)將碳(tan)纖(xian)(xian)維(wei)(wei)(wei)布粘(zhan)貼(tie)于混(hun)凝(ning)土(tu)(tu)表面,起到(dao)結(jie)構補(bu)強和抗震加(jia)(jia)固的(de)作(zuo)用(yong)。廣泛適(shi)用(yong)于建(jian)筑(zhu)梁、板、柱、墻等的(de)加(jia)(jia)固,以及(ji)橋梁、隧道、煙囪(cong)、筒(tong)倉等其它土(tu)(tu)木(mu)工程的(de)加(jia)(jia)固補(bu)強。
特點:高強(qiang)高效,碳纖維的抗拉強(qiang)度高于普通鋼10~15倍(bei),彈性(xing)(xing)模量(liang)與鋼接近;具有(you)良好(hao)的耐(nai)久性(xing)(xing)胡耐(nai)酸堿鹽各類化(hua)(hua)學(xue)介質的腐蝕,不需定期維護(hu);良好(hao)的耐(nai)熱和耐(nai)寒性(xing)(xing)長期在-54℃至83℃條件下(xia)使用,強(qiang)度不發生變化(hua)(hua);抗紫外(wai)線(xian)及核(he)輻射(she),碳纖維片(pian)的強(qiang)度和粘著(zhu)性(xing)(xing)在50年(nian)時間內不發生劣化(hua)(hua),在核(he)輻射(she)實驗室(shi)中可經受20年(nian)
植(zhi)(zhi)筋(jin)(jin)(jin)加(jia)固(gu)技術:梁,柱(zhu)(zhu)加(jia)大斷(duan)面植(zhi)(zhi)筋(jin)(jin)(jin),柱(zhu)(zhu)加(jia)牛(niu)腿,水(shui)(shui)平(ping)植(zhi)(zhi)筋(jin)(jin)(jin)。墻(qiang)體(ti)加(jia)厚拉結(jie)(jie)植(zhi)(zhi)筋(jin)(jin)(jin)。結(jie)(jie)構(gou)加(jia)層(ceng)柱(zhu)(zhu)頭拉結(jie)(jie)鋼(gang)筋(jin)(jin)(jin)。梁體(ti)接長水(shui)(shui)平(ping)植(zhi)(zhi)筋(jin)(jin)(jin)。梁,板懸挑水(shui)(shui)平(ping)植(zhi)(zhi)筋(jin)(jin)(jin),梁上加(jia)柱(zhu)(zhu),垂直(zhi)植(zhi)(zhi)筋(jin)(jin)(jin)。基礎,連續墻(qiang)植(zhi)(zhi)筋(jin)(jin)(jin)。預制梁修復植(zhi)(zhi)筋(jin)(jin)(jin)。幕(mu)墻(qiang)埋件(jian),機械設備(bei)固(gu)定等.