湖南汉寿县和平桥是座由汉寿县城至西湖农场公路线上的一座一孔净跨39m,全长63.2m的双平铰微弯板坦肋拱桥(矢跨比为1/9),该桥于1979年底开始施工,当完成90％工程量时,由于桥台基础土质软弱,加之基底前后趾应力分布不均衡,致使桥台产生过大的竖向和水平向位移(下沉值:台口9.9～11.8cm,台尾17.2～17.3cm),拱轴线下沉0.42m(拱顶处),桥跨增大(实测 Hanzhong County, Hunan Peace Bridge is a seat from the Hanshou County to West Lake Farm Road, a hole 39m across the net length of 63.2m double flat hinge micro-curved plate Tan ribs arch (cross-ratio of 1/9) The bridge started construction at the end of 1979. When the completion of 90% of the project volume, due to the weak soil quality of the abutment foundation and unbalanced distribution of stress at the anterior and posterior base of the substrate, the bridge abutment produced excessive vertical and horizontal displacement (sinking value: Taiwan’s mouth 9.9 ~ 11.8cm, Taiwan’s tail 17.2 ~ 17.3cm), the arch axis sinking 0.42m (vault), bridge span increases (measured