摘要
研究了基层墙体为加气混凝土砌块时,锚栓的锚固深度、钻孔直径、施工安装顺序、孔洞处理方式、环境温度等因素对锚栓受力性能的影响。结果表明:敲击式塑料锚栓锚固深度越大抗拉承载力越高,锚固深度大于50 mm时,抗拉承载力达到0.3 kN,锚固深度80 mm时,抗拉承载力达到0.6 kN;钻孔直径大于锚栓直径时,锚栓抗拉承载力降低,当孔径大于锚栓直径2 mm时,抗拉承载力降低50%~70%;钻孔直径小于锚栓直径时,锚栓的抗拉承载力提高,施工时若锚栓与锚钉一起同时敲入孔内,抗拉承载力将大幅度降低,锚固深度为60 mm时,抗拉承载力约降低74%;采用在孔内注入结构胶或在塑料锚栓表面先涂覆结构胶再将锚栓插入孔内的方式施工,锚栓的抗拉承载力可大幅提高;季节性温度对锚栓的抗拉承载力会产生一定影响,高温环境条件下施工的锚栓,处于低温环境时,锚栓的抗拉承载力将会降低。
The influence of anchor depth,drilling diameter,installation sequence,hole treatment and ambient temperature on the performance of anchor bolts when the base is aerated concrete block was studied.The results show that the greater the anchorage depth of the percussion plastic anchor bolt,the higher the tensile bearing capacity,at an anchorage depth greater than 50 mm,tensile bearing capacity is 0.3 kN,at an anchorage depth greater than 80 mm,tensile bearing capacity is only up to 0.6 kN.When the drilling diameter is greater than the anchor bolt diameter,lower tensile bearing capacity of anchor bolt,when the aperture diameter is 2 mm greater than the anchor bolt diameter,tensile capacity reduced by about 50%~70%.When the drilling diameter is less than the anchor bolt diameter,increasing the tensile bearing capacity of the anchor bolt,If the anchor bolt and the anchor simultaneously knock into the hole,the tensile bearing capacity will be greatly reduced,at an anchor depth of 60 mm,tensile capacity reduced by about 74%.Fill the hole or apply the structural glue to the surface of the plastic anchor bolts before inserting the anchor bolt into the hole,the tensile bearing capacity of the anchor bolt will be greatly improved.Seasonal temperature will have a certain influence on the tensile bearing capacity of the anchor bolt,the tensile capacity of the anchor bolts constructed under high-temperature environmental conditions will be reduced in low temperatures.
作者
赵考重
魏方旭
刘梦璇
ZHAO Kaozhong;WEI Fangxu;LIU Mengxuan(School of Civil Engineering,Shandong Jianzhu University,Jinan 250101,China;Engineering Research Institute of Appraisal and Strengthening,Shandong Jianzhu University,Jinan 250013,China)
出处
《新型建筑材料》
2021年第10期120-124,137,共6页
New Building Materials
基金
国家重点研发计划项目(2017YFC0806100)。
关键词
饰面层
保温系统
塑料锚栓
抗拉承载力
finishing layer
insulation system
plastic anchor bolt
tensile bearing capacity
