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在既有线上原位改建中桥，桥台无法按一般方式修建，本方法为：向既有桥台后路堤内顶入一小的箱形桥，并填实，作为新桥的台身，然后施工桥台的上部──台帽、胸墙、翼墙等。
In the existing online reconstruction of the bridge in situ, the abutment can not be built in the usual way, the method is: to the existing abutment embankment into a small box-shaped bridge, and fill in, as the bridge of Taiwan body, Then the upper part of the abutment construction ─ ─ Taiwan’s hat, chest wall, wing wall and so on.