安装桥墩台模型时,常因枋木外带强度不够而不得不采用钢筋作内拉杆,同时还得使用套筒螺丝。灌注混凝土时也常因灰斗或掺加片石碰击内拉杆,引起模型板的变形。能不能取消内拉杆呢?在大搞技术革新运动中,我根据预加应力的原理,提出采用预应力枋木,取消模型内抗杆的设想。通过试验证明,采用这种 When installing the pier model, often because of the strength of albacore is not enough and had to use steel bars as the pull rod, but also have to use the sleeve screws. Pour concrete often because of hopper or splinter hit the inner rod, causing the deformation of the model board. Can not cancel the pull rod? In the major technological innovation movement, according to the principle of prestress, I put forward the use of prestressed alder, cancel the model within the anti-rod idea. Proved through the experiment, using this