一种双幅连续刚构桥的矮塔斜拉桥加固结构及施工方法

本发明公开了一种双幅连续刚构桥的矮塔斜拉桥加固结构及施工方法，包括斜拉索、以及设置在原双幅主墩承台之间的新增承台、设置在原双幅主墩墩身之间的新增墩身和设置在原双幅箱梁内侧腹板外边缘之间的新增顶板和新增底板；原双幅箱梁内侧腹板、新增顶板和新增底板形成新箱室，新箱室内设有墩顶横隔板和锚固横隔板，在与墩顶横隔板对应的新增顶板上设有索塔；斜拉索穿过索塔，两端分别安装在锚固横隔板上。本发明使双幅箱梁变单箱多室的整体箱梁，梁体的抗弯承载力、抗剪承载力、抗扭承载力均得到较大的提高，箱梁的受力得到明显改善；斜拉索能够有效减小箱梁的挠度，改善桥梁的线型，提高结构的耐久性，延长结构的使用寿命。 The invention discloses a low-pylon cable-stayed bridge reinforcement structure and a construction method of a double-pylon continuous rigid frame bridge, comprising a cable-stayed bridge, a newly-added bearing cap arranged between the original double-pylon main pier caps, a newly-added pier body arranged between the original double-pylon main piers, and a newly-added top plate and a newly-added bottom plate arranged between the outer edges of the inner webs of the original double-pylon box girder. A new box chamber is formed by an inner web plate of the original double-width box girder, a newtop plate and a new bottom plate, a pier top diaphragm plate and an anchoring diaphragm plate are arranged in the new box chamber, an