所述边拱(5)上端与边跨主梁刚性连接，下端与主桥墩(9)刚性连接。
The upper end of the side arches (5) has the rigid connection with the side span girders and the lower end has the rigid connection with the main piers (9).
由于边拱具有不对称性，因此浇注边拱混凝土时现浇支架将承受巨大的水平推力。
Because of asymmetry of side arch, the support for casting will bear tremendous horizontal thrust when placing side arch concrete.
支拱板条专门用来在拱顶石放置好以前支撑拱的两边木架子。
A wooden frame built especially to support the sides of an arch until the keystone is positioned.
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