在软土地基上桥台习惯上采用桩基础框架式桥台。桩基础的工后沉降一般很小 ,可以看作无沉降。软土路基的沉降很大 ,有时多达 1m多 ,工后沉降也有 5 0cm～ 6 0cm。若采用长5 0 0cm搭板进行过渡时 ,则运营过程中 ,搭板的坡度变化很大 ,搭板末端容易产生跳车 ,影响乘车的舒适并对车辆造成损害。如果把桥梁的边跨梁 (板 )看作搭板 ,把桥台看作搭板的枕梁而设计成可产生一定沉降的箱式桥台 ,沉降差在较长的范围内进行过渡 ,可以减少跳车大大改善行车的舒适性。 Abutments on soft soil have traditionally used pile foundation frame abutments. Post-construction pile foundation is generally small, can be seen as no settlement. Subsidence of soft soil subgrade is very large, sometimes as much as 1m, post-construction settlement also has 50cm ~ 60cm. In the case of a transitional length of 500 cm, the gradient of the slab varies greatly during operation. The end of the slat is prone to jumping, affecting the ride comfort and causing damage to the vehicle. If the bridge side of the beam (slab) as the slab, the abutment as the slab beam designed to produce a certain settlement box abutment, settlement difference in the longer range of transition, you can Reducing jumpers greatly improves driving comfort.