阆中市嘉陵江四桥索塔墩承台钢套箱安装

摘要

River-spanning bridge because of the river is wide, pier to be located on the water, for aesthetic needs, the main pier are below the water, so that the cap to steel cofferdam, steel box can water isolation measures. Langzhong Jialing River and four bridges pylon pier also have this characteristic, the upper reach of Jialing River is shallow, geology for alluvial, alluvial sand pebble pile cap, and before the implementation of this situation, using steel box as the cap water barrier measures. Piers of river-spanning bridge are usually established in water because of great width. The main pier is usually set lower than water level for artistic sight, and cushion cap can only be established with waterproof measures like steel cofferdam and steel cover box. But because of large size and heavy weight as well as the pier in river water, steel cover box can only be installed section by section. Ways of safe installation, accurate localization and accurate joint are key to success. The cushion cap steel cover box installation of cable pylon of the four bridges of Jialingjiang River in Langzhong can meet the requirement and get good results for references.%跨江大桥常因河面较宽桥墩需设于水中，出于美观需要，主墩承台大多低于水位，承台需要钢围堰、钢套箱等隔水措施才能实施。而钢套箱体型大、重量大，受桥墩位于河中限制，需采用分节段吊放拼装就位，连接成整体下落。如何安全吊装、准确就位、高精度的对接是钢套箱成败的关键。阆中市嘉陵江四桥索塔墩钢套箱实施过程中周密策划达到设计要求，完成效果良好，为钢套箱实施提供点滴参考。