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预应力张拉锚具是预应力工艺重要组成部分。预应力件质量好坏与锚具有很大的关系。我公司施工的某工厂装配式屋面共五万平方米,计24米跨预应力钢筋混凝土屋架200榀,18米跨的151榀。预应力筋采用直径为12毫米44锰2硅螺纹钢筋(1244Mn2Si)及直径为5毫米的高强碳素钢丝两种,分别用JM12型锚具及锥形锚栓式锚具锚固。其图样尺寸按钢筋混凝土工程施工验收规范抄录。但在使用过程中发生钢丝滑移
Prestressed tension anchors are an important part of the prestressing process. The quality of prestressed parts has a great relationship with anchors. Our company constructed a factory with a total of 50,000 square meters of prefabricated roofing, including a 200-meter span prestressed reinforced concrete roof truss 200 feet and an 18-meter span 151 feet. Prestressed tendons are 12 mm diameter, 44 mm2 silicon-reinforced steel bar (1244Mn2Si) and high-strength carbon steel wire with a diameter of 5 mm. They are respectively anchored with JM12 type anchors and tapered anchor bolts. The size of its drawings shall be copied according to the acceptance specification for reinforced concrete works. However, wire slip occurs during use