当公路跨越山谷、海湾、海峡以及巨型海轮出入的大河河口等地时,桥梁往往以其宏伟壮观和外形协调而引人注目。这种印象不仅由于桥梁全长及其中跨很大,而且还由于桥墩高耸所造成。虽然高墩的横截面(通常指箱形截面)尺寸很大,可是就其整体来看却显得轻巧协调,并给人以美的感受。 When the road crosses valleys, gulfs, straits, and large river estuaries into and out of giant sea-going ships, the bridge often draws attention for its grandness and shape. This impression is due not only to the full length of the bridge and its midspan but also to the high pier. Although the cross section of tall piers (often referred to as box-shaped cross-sections) are large in size, they appear to be lightly coordinated and give a beautiful impression on the whole.