欢迎您访问济南天桥区魏氏防水工程队官方网站!
济南天桥区魏氏防水工程队

专注房屋漏水防水施工工程

当前位置:首页>>新闻资讯>>常见问题>>混凝土楼板产生裂缝的原因有哪几方面?

混凝土楼板产生裂缝的原因有哪几方面?

 文章来源:http://www.jnldfs.com/ 发布时间:2021-10-09   

当前在钢筋混凝土民用建筑物中,现浇混凝土楼板出现变形裂缝的现象较为普遍,已成为商品房质量纠纷、投诉的热点问题,它不仅影响使用功能,有损外观,而且破坏结构的整体,降低其刚度,引起钢筋腐蚀,影响持久性强度和耐久性。那么混凝土楼板产生裂缝的原因有哪几方面?
At present, in reinforced concrete civil buildings, the phenomenon of deformation cracks in cast-in-situ concrete floor slab is relatively common, which has become a hot issue of commercial housing quality disputes and complaints. It not only affects the use function and damages the appearance, but also destroys the whole structure, reduces its stiffness, causes reinforcement corrosion, and affects the durability, strength and durability. So what are the causes of cracks in concrete floors?
1.设计方面
1. Design
设计结构时安 全储备偏小,配筋不足或截面较小,使梁板成型后刚度差,整体挠度偏大,引起板四角裂缝。设计板厚不够,又不做挠度验算,整体挠度偏大,引起板四角裂缝。房屋较长时未设置伸缩缝,在薄弱环节产生收缩裂缝。基础设计处理不当,引起不均匀沉降,使上部结构产生附加应力,导致楼板裂缝。楼板双向受力,按单向板配筋,引起裂缝。
When designing the structure, the safety reserve is too small, the reinforcement is insufficient or the section is small, resulting in poor stiffness and large overall deflection after beam and plate forming, resulting in cracks at the four corners of the plate. The design plate thickness is not enough, and the deflection checking calculation is not done. The overall deflection is too large, resulting in cracks at the four corners of the plate. When the house is long, expansion joints are not set, resulting in shrinkage cracks in weak links. Improper treatment of foundation design leads to uneven settlement, additional stress in the superstructure and floor cracks. The floor is stressed in two directions and reinforced according to one-way slab, causing cracks.
2.商品混凝土原因
2. Reasons for commercial concrete
水灰比大,水泥用量大。高能缓凝剂用量过大,在未凝固前石子下沉,产生沉缩裂缝,常发生在梁板交接处。砂石质量不好,级配不好,含泥量大,含粉量大。
Large water cement ratio and large amount of cement. The amount of high-energy retarder is too large, and the stone sinks before solidification, resulting in shrinkage cracks, which often occur at the junction of beam and slab. The quality of sand and gravel is poor, the grading is poor, the mud content is large, and the powder content is large.
3、施工原因
3. Construction reasons
养护不到位,强制性规范要求混凝土养护要苫盖并浇水,现在大多数不苫盖,浇水也不能保证经常性湿润。施工速度过快,上荷早,特别是砖混住宅楼板,前一天浇筑完楼板,二天即上砖、走车,造成早期混凝土受损。冬时期间受冻。拆模过早或模板支撑系统刚度不够。混凝土表面浮浆过厚,表面强度不够。施工时楼板混凝土盖筋被踩弯、踩倒,保护层过厚,承载力下降。
The curing is not in place. The mandatory specifications require that the concrete curing be covered and watered. Now most of them are not covered, and watering can not ensure regular wetting. The construction speed is too fast and the loading is early, especially the floor slab of brick concrete residence. The floor slab was poured the day before, and the bricks and vehicles were loaded the next day, resulting in damage to the early concrete. They are frozen during winter. Early formwork removal or insufficient rigidity of formwork support system. The laitance on the concrete surface is too thick and the surface strength is not enough. During construction, the floor concrete cover bar is bent and trampled down, the protective layer is too thick, and the bearing capacity decreases.
通过以上小编的总结,施工人员在现浇混凝土楼板的过程中一定要注意,避免楼板出现裂缝。
Through the summary of the above small series, the construction personnel must pay attention to the process of cast-in-situ concrete floor slab to avoid cracks in the floor slab.
服务项目 / Recommended news
  • 外墙保温工程
    外墙保温工程
  • 济南外墙保温工程
    济南外墙保温工程
  • 外墙保温工程
    外墙保温工程
  • 济南外墙保温工程公司
    济南外墙保温工程公司
  • 外墙保温工程
    外墙保温工程
  • 济南外墙保温工程
    济南外墙保温工程
  • 外墙保温工程
    外墙保温工程
  • 卫生间防水
    卫生间防水
  • 济南卫生间防水
    济南卫生间防水
  • 卫生间防水
    卫生间防水
  • 卫生间防水
    卫生间防水
  • 卫生间防水公司
    卫生间防水公司
  • 卫生间防水
    卫生间防水
  • 卫生间防水
    卫生间防水
  • 楼顶防水
    楼顶防水
  • 济南防水公司
    济南防水公司
  • 济南楼顶防水
    济南楼顶防水
  • 楼顶防水
    楼顶防水
  • 济南屋面防水
    济南屋面防水
  • 楼顶防水
    楼顶防水
联系我们
/Contact us
济南天桥区魏氏防水工程队
济南天桥区魏氏防水工程队

客户咨询热线

0531-58663452

服务电话:13665318269

联系人:魏经理

公司网址:http://www.jnldfs.com/

联系地址:天桥北园水屯路118号