混凝土结构中通用型多功能钢筋马凳施工技术研究

Research on Construction Technology of Universal Multifunctional Rebar Chair in Concrete Structures

现浇钢筋混凝土构件钢筋保护层厚度涉及到结构承载力、耐久性、抗震、防火等性能,是结构实体检验中的重点检测指标,对钢筋混凝土结构的安全质量发挥着重要作用。针对现浇板钢筋保护层厚度的各种传统控制方法在实际操作中存在的不足,研制发明了一种通用型多功能钢筋马凳(获国家实用新型专利及发明专利,专利号:ZL201820835915.8),集钢筋架立、锁定主筋、支撑线管、精控标高等功能于一体,替代常规的砂浆垫块、大理石垫块、塑料垫块及传统的马凳筋,解决目前现浇板钢筋工程普遍存在的骨架变形、主筋偏位、钢筋保护层厚度超标等质量缺陷,有效防止钢筋保护层过薄或过厚引发的工程事故隐患,提升钢筋安装工程的整体质量,确保钢筋混凝土工程实体结构安全。

The thickness of the reinforced protective layer of cast-in-situ reinforced concrete members involves structural bearing capacity,durability,earthquake resistance,fire protection and other properties.It is a key detection index in the entitative inspection and plays an important role in the safety and quality of reinforced concrete structures.In view of the shortcomings in the actual operation of various traditional control methods for the thickness of the steel protection layer of the cast-isitu plate,a universal multifunctional rebar chair was developed and invented(won the patent for utility model and invention of China,the patent number is:ZL201820835915.8),which integrates the functions of the steel bar stand,locking the main bars,supporting wire pipes,and precision control standards,replacing the conventional mortar or marble or plastic cushion blocks and traditional rebar chair bars,solving the common defects such as the skeleton deformation,the partial position of the main rib,and the excessive thickness of reinforced protective layer.And it also effectively prevents the hidden danger of engineering accidents caused by the thin or thick protective layer,improves the overall quality of the steel reinforcement installation,and ensures the entitative safety of the reinforced concrete construction.