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在公路、铁路两用特大桥上,上层公路桥伸缩缝的漏水,造成下层铁路桥钢梁的锈蚀。为了保证大桥的良好技术条件和延长使用年限,必须反复钢梁油漆(或喷涂锌铝等)及缩短维修周期。从经济上说,它大大地增加了费用。南京长江大桥公路桥通车后,不久就发现伸缩缝普遍存在着漏水问题。全桥152条伸缩缝几乎都存在漏水或渗水,特别是正桥,近50条伸缩缝年年维修,年年漏水,成为桥梁维修的老大难问题之一。直至1977年,我们开始逐步引用聚氯乙烯胶泥后,才取得较好效果。现将整治方法
On the highway and railway dual-purpose super large bridge, the leakage of expansion joints in the upper-level highway bridge caused the corrosion of the steel beams of the lower railway bridge. In order to ensure the bridge’s good technical conditions and extend the service life, must repeat the steel beam paint (or spraying zinc aluminum, etc.) and shorten the maintenance cycle. Economically speaking, it has greatly increased costs. Nanjing Yangtze River Highway Bridge opened to traffic, soon found that there is widespread leakage joints leakage problems. Nearly all of the expansion joints in the whole bridge there are leaking or water seepage, in particular, is the bridge, nearly 50 expansion joints annual maintenance, leakage year after year, become one of the most difficult problem of bridge maintenance. Until 1977, we began to gradually apply polyvinyl chloride clay before we achieve better results. Now remediation methods