摘要
由于混凝土自身材料特性等原因,车库地坪找平层易开裂、空鼓,为减少裂缝的产生,一般采用钢筋网片方案进行抗裂,而实践发现,这一方案并不能起到很好的抗裂作用,取而代之的应是钢纤维混凝土这一新型高性能混凝土材料,该文对地下车库地坪钢纤维混凝土的施工技术进行研究:在施工之前,布设基准点并预设排水沟,根据配合比制备混凝土,并在混凝土中布设钢纤维,在施工地面布设抗裂钢筋;利用激光整平机摊铺混凝土,并做伸缩缝切割以及找平处理,进行钢纤维混凝土浇筑,采用“铺设土工布+洒水+固化剂”方式对钢纤维混凝土进行养护,完成地下车库地坪钢纤维混凝土施工。结果表明,钢纤维混凝土施工后地下车库地坪裂缝宽度、长度以及深度均低于最大限值,符合规范要求,设计技术具有良好的施工效果,在地下车库地坪钢纤维混凝土施工方面具有良好的应用前景。
Due to the inherent material properties of concrete,the leveling layer of garage floors is prone to cracking and hollowing.To mitigate crack formation,steel mesh reinforcement schemes are typically employed for crack resistance.However,practical experience has shown that such schemes do not effectively prevent cracking.As an alternative,steel fiber reinforced concrete(SFRC),a novel high-performance concrete material,should be utilized.This paper delves into the construction technology of SFRC for underground garage floors.Prior to construction,benchmark points are established,and drainage ditches are preset.Concrete is prepared according to a precise mix ratio,and steel fibers are incorporated into the mix.Anti-crack reinforcement is laid on the construction surface.A laser screed is utilized to spread the concrete,and expansion joints are cut and leveling adjustments are made.The SFRC pouring process is then carried out,followed by curing through a method of"laying geotextile+sprinkling water+applying curing agent."This completes the construction of the underground garage floor using SFRC.The results indicate that the width,length,and depth of cracks in the underground garage floor after SFRC construction are all below the maximum allowable limits,satisfying regulatory requirements.The designed technology demonstrates excellent construction performance and holds promising application prospects in the construction of underground garage floors using SFRC.
出处
《重庆建筑》
2024年第7期79-81,共3页
Chongqing Architecture
关键词
地下车库地坪
钢纤维混凝土
抗裂钢筋
激光整平机
伸缩缝
土工布
Underground garage floor
Steel fiber reinforced concrete(SFRC)
Anti-crack reinforcement
Laser screed
Expansion joint
Geotextile
