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地下室筏板可以分段浇筑工吗?还是必须要整天施工?如果可以分段施工要注意些什么呢? - 工程施工 - 项目管理 - 氿上知道
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满意答案
筏型基础又叫笩板型基础,即满堂基础。是把柱下独立基础或者条形基础全部用联系梁联系起来,下面再整体浇注底板。由底板、梁等整体组成。建筑物荷载较大,地基承载力较弱,常采用砼底板,承受建筑物荷载,形成筏基,其整体性好,能很好的抵抗地基不均匀沉降。筏板基础分为平板式筏基和梁板式筏基,平板式筏基支持局部加厚筏板类型;梁板式筏基支持肋梁上平及下平两种形式。一般说来地基承载力不均匀或者地基软弱的时候用筏板型基础。而且筏板型基础埋深比较浅,甚至可以做不埋深式基础。筏板基础施工,混凝土浇筑完毕,应洒水养护的时间为(不少于7天)。
对梁板式筏板基础,多采用底板和梁钢筋、模板同时施工好,混凝土一次连续浇筑,此时梁侧模就需用钢筋支架支承并固定。
厚度大的筏板基础,属于大体积混凝土,需从材料、配合比和浇筑顺序、养护方法等方面着手防止产生温度裂缝,尤其对于梁板式由于变断面,降温和收缩应力不同,更易出现裂缝。如条件允许,对长度大的筏板基础宜设后浇带,以避免出现温度裂缝。
基础混凝土浇筑后,应表面覆盖并洒水养护,必要时采取保湿养护措施。
城市的精灵
回答于:2013-08-29
共4条回答