武荆高速公路桥梁优化设计

通过对高速公路桥梁的优化设计，提出在平原路段缩孔的原则，即将桥台从地质不良或较差的地段移至地质良好或较好地段；在微丘路段应选择地势平坦的位置设置新桥台，确保桥台稳定性，以路代桥；淤泥质粘土或淤泥质亚粘土的软基地段桥头填土高度不超过6．5m，地质良好地段不超过9m。实践证明其优化设计技术可行，经济最优。

Optimum Design for Bridges of Wujing Freeway

Brought forward by the optimum design, in the plain road section, the principle that bridge lengths were contracted is to move the bridge abutment from the place with bad or worse geology to the place with good or better geology, in the rolling terrain road section, the principle that bridge lengths were contracted, is to select a place with flat hypsography to set up a new abutment so as to insure the stability of the abutment and it would replace bridges by roads, in the place with soft foun- dations of mucky clay or mucky loam, it would control the filling height not more than 6.5m, and in the place with good geology, including the plain road section and the rolling terrain road section, it would control the filling height not more than 9m, and all above were feasible, proved by practice. The optimum design has save the budget of bridges more than RMB 30 million.