栈道——中国古代第三大建筑奇迹

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李白的《蜀道难》一诗,起首便是那骇人的惊叹:“噫,吁唏!危乎高哉。蜀道之难难于上青天!” 然而,令人慨叹的尚不止是蜀道的难行,能在这黄鹤难飞,猿揉难攀的崇山绝(山献)之上开出路来,岂不更应叹为观止。今天,当我们站立在秦岭之下,仰望凌空飞架的条条栈道,仍不禁为那鬼斧神工所慑服。 秦蜀之间的栈道,据专家考证,早于长城的修建。在冶铁技术远未发达而火药也尚未发明之时,能够开山凿岭修出这样的栈道,足征中国人民的智慧惊人。难怪著名桥梁学家茅以升要把栈道称为与长城、 Li Bai’s “Shudao difficult” a poem, the beginning is that appalling exclamation: “噫, 吁 唏! Dangerous Gaozhu. The difficulty of Shudao on the sky!” However, it is lamenting more than just Shu Difficult road, can be difficult to fly in this Yellow Crane, ape rubbing climb the mountain must (Shan Xian) above the road, would not it even more spectacular. Today, when we stand under the Qinling Mountains, looking at the flying spears of the path along the cliff, still can not help but be convinced. The path between Qin and Shu, according to expert research, earlier than the construction of the Great Wall. When the technology of ironmaking is far under developed and the gunpowder has not been invented yet, it can open up the path along the cliff and raise the wisdom of the Chinese people. No wonder the famous bridge scientist Mao Yisheng to the Plank Road and the Great Wall,
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<正> 唐华清宫遗址位于今陕西省临潼县城南,骊山北麓,是唐朝皇帝为洗沐温泉而专设的行宫。初唐时期,华清宫又名汤泉宫或温泉宫,据宋人宋敏求《长安志》“贞观十八年(644年),诏左屯卫大将军姜行本,将作少匠阎立德营建宫殿,御赐名‘汤泉宫’,太宗因幸制碑。(唐高宗)咸亨二年(671年)改名温泉宫。(唐玄宗)天宝六年(747年)又改为华清宫”。据史书记载,在骊山温泉修建汤池殿宇始自秦汉时期。当时,在贵族间盛行由中亚地区传进的“温汤疗疾”的习俗,相信温泉