Shanghai-Chengdu Expressway
Shanghai-Chengdu Expressway-
The section from Yichang to Enshi of the Shanghai-Chengdu expressway goes through mountainous area , and bridges and tunnels account for 50 % of the length of the section . Shallow large-span double-linked-arch tunnel was adopted to save investment at the transition between bridges and tunnels .
沪蓉高速公路宜昌-恩施段修建在崇山峻岭之中，其桥隧长占路线总长的50%，为减少工程的投资，在部分地段将采用浅埋双跨连拱隧道的方案来实现桥隧的合理过渡。
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