在增加屋架使用荷载又不改变原有跨度的情况下，进行三角形豪式混合屋架全面加固时，对压杆多采用镶贴法，对拉杆往往采用替换法。要进行拉杆替换，势必要拓扩节点联结孔，加固前和加固后共有两次吊装过程。对钢筋混凝土杆件的节点联结孔进行拓扩，施工难度、工程费用大。而采 In the case of increasing the use load of the truss without changing the original span, when the triangular hull type mixed truss is fully reinforced, the insert method is often adopted for the compression rods, and the replacement method is often used for the tie rods. To replace the rod, it is necessary to expand the joint hole of the node. There are two lifting processes before and after the reinforcement. The expansion joints of the reinforced concrete bar members are expanded to make the construction difficult and the engineering cost large. And mining