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        網站公告:濟南立博機械設備有限公司主要經營新型建材設備有:墻板機,墻板設備,復合墻板設備,輕質墻板設備,輕質墻板生產線等

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        減少預制輕質隔墻板裂縫產生的方法

        文章出處:立博機械設備集團發表時間:2015-08-27 11:39【

        隨著預制輕質隔墻板自重輕、低碳節能、安裝方便、節省工期等優點越來越得到用戶的認可,在工業與民用建筑的多層或高層的非承重內隔墻中應用較為普遍,取得了滿意的效果。但是由于其在安裝完成使用一定時間后容易產生裂縫,且安裝裂縫不容易控制,成為阻礙預制輕質隔墻板行業發展的一大難題,從而影響該產品的推廣和應用。對產生裂縫的原因,重點從預制輕質隔墻板的使用和受力分析。預制輕質隔墻板通常安裝在框架結構或框剪結構等建筑物非承重部位做填充墻,安裝部位多屬短肢剪力結構,且大都分處在大跨度、大開間、沉降變形較大、抗荷載能力較弱的地方,開裂比率較大。此外,由于墻板單塊獨立,接縫口具有拼裝連接的特殊性,當結構受到水平荷載或震動,應力和外力發生變化時,極易造成板與板連結處出現縱向裂縫等問題。為此,筆者對預制輕質隔墻板的裂縫現狀進行調查分析,篩選影響裂縫產生的主要原因,提出降低預制輕質隔墻板裂縫產生的具體方法和措施。

        1進貨檢驗手續不嚴格

        板材進場時,未嚴格履行進貨檢驗手續,致使未到齡期的板材進入現場并用于安裝,使板材因收縮變形進而產生裂縫,影響程度較大。

        2施工方案不夠明細

        調查分析施工方案中未明確梁底鋼卡的數量、位置及錨固方式,F場調查,存在漏卡、鋼卡錨固不牢、位置不合理等情況使板不穩定導致的裂縫,影響程度較大。

        3板下砼支墊澆筑不密實,木楔子抽取時間過早

        調查分析現場調查發現,板下部混凝土支墊澆筑不密實,下部支墊不能完全支頂墻板,且安裝時用于定位和支頂墻板的木楔子在混凝土支墊未完全凝固的時候抽取,時間過早,導致板下沉產生裂縫。

        4無防止裂紋延展措施

        調查分析豎向縫內砂漿收縮產生裂紋延展至板面的現象較普遍,板面無防止此類裂紋延展的措施,使其收縮產生的裂紋擴大化。

        5板安裝時未設置伸縮縫

        調查分析隔墻板安裝長度過長,收縮應力累計過大,兩板對接豎縫內的粘接材料強度相對較薄弱,因此產生裂縫。經查,本工程墻板安裝長度一般均大于3m。因此,該項對安裝裂縫影響程度較大。

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