Steel jacket box structure for bridge foundation pile lifting reinforcement and construction method of steel jacket box structure

The invention belongs to the technical field of bridge reinforcement engineering, and particularly relates to a steel jacket box structure for bridge foundation pile lifting reinforcement and a construction method thereof. The invention provides a steel jacket box structure for bridge foundation pile lifting reinforcement, which structurally comprises two extension plate units, two closing plate units and four water-stop belts, so that 1, the steel jacket box structure can be fully screwed and fixed on a bearing platform, and the mounting stability is higher; and 2, water-stop belts are arranged at four splicing positions between the steel jacket box structure and the bearing platform, so that the steel jacket box cofferdam has better sealing and waterproof permeability performance. 本发明属于桥梁加固工程技术领域，尤其涉及一种桥梁基础抬桩加固的钢套箱结构及其施工方法。本发明提供一种桥梁基础抬桩加固的钢套箱结构，其结构组成包括2个延伸板单元、2个封闭板单元，以及4个止水带，使得：1、钢套箱结构可以在承台上充分螺接固定，安装稳定性较高；2、钢套箱结构与承台之间的4个拼接处都设有止水带，保证该钢套箱围堰具有较好的密封防水渗透性能。