The alloy casting methods of hot-cast anchors for bridge cables have a significant impact on the compactness of the casting body and the anchorage performance of the anchors.Numerical simula-tion of casting filling and solidification process is employed to study the influence of different casting methods and process parameters on the shrinkage and loosening of alloy casting bodies.The study fo-cuses on two types of cable anchors,that is,the Φ7 mm-187-2100 MPa cable anchors of cable-stayed bridges and the Φ5 mm-127-2200 MPa anchors of main cable strands of suspension bridges.The find-ings clearly show that the horizontal casting method,setting the top riser separately from the gate on the casting mould,maintaining the alloy casting temperature at 450 °C,preheating the mould to 250 ° C,and heating the upper large end of the mould to a temperature exceeding 390 °C for 12 minutes dur-ing alloy filling and solidification,are the most effective ways to enhance the compactness of the cast-ing body.The analytical results provide unquestionable theoretical and technical support for the design and fabrication of hot-cast anchors of bridge cables.
关键词
桥梁缆索/热铸锚/充型凝固/水平灌锚法/密实度
Key words
bridge cable/hot-cast anchor/forming and solidification/horizontal casting method/compactness
维普
万方数据