In theory, the equipment installed on a bridge across Madrid's M30 freeway should have lifted the 13m-long, 18m-wide span of reinforced concrete with ease. However, with sensors indicating that the maximum load capacity of the bridge was rapidly approaching, as was the time to reopen Spain's busiest freeway beneath, the on-site engineers were faced with something of a mystery. The 105m-long Avenida del Mediterraneo Bridge is a concrete bridge with two symmetrical concrete decks, each 18m-wide and consisting of two central isostatic spans supported by seven longitudinal concrete beams. Opened in 1959, it was the first crossing over the busy M30 ring road, marking the entrance to the A3 highway that connects the Spanish capital to the city of Valencia.
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机译：从理论上讲，安装在横跨马德里M30高速公路的桥梁上的设备应该可以轻松提起13m长，18m宽的钢筋混凝土跨度。然而，随着传感器指示桥梁的最大承载能力正在迅速接近，以及重新开放西班牙最繁忙的高速公路的时间，现场工程师面临着一个谜。长105m的Avenida del Mediterraneo桥是一座混凝土桥，有两个对称的混凝土甲板，每个甲板18m宽，由两个中央等静距跨度组成，并由七个纵向混凝土梁支撑。它于1959年开放，是繁忙的M30环路的第一个交叉口，标志着A3高速公路的入口，该高速公路将西班牙首都与瓦伦西亚市连接起来。
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