在役石拱桥的钢-混凝土组合结构加固法

结合工程实例,通过计算分析,采用钢-混凝土组合结构配合挂网、自密实混凝土的方法,对石拱桥进行加固,可显著提高桥梁的承载力、刚度及防撞击能力,从而达到桥梁荷载等级提升、运营能力提高的目的。同时,节省了大量模板,解决了湖南地区轻型石拱桥粘钢困难,加固效果难以保证的难题,为石拱桥的改造加固提供了一种新思路。

Reinforcement method of inservice stone arch bridge with steel-concrete composite structure

In this paper,combined with practical work,steel-concrete composite structure fitted with suspended net and self-compacting concrete is adopted for strengthening of stone arch bridges.By calculation and analysis,the method can greatly improve carrying capacity,rigidity and striking prevention ability of the strengthened structure and consequently upgrade the load and improve operation capacity of stone arch bridge.At the same time,it saves a lot of templates,solves the problem of difficulty in light-weight stone arch bridge bonded with steel,ensures the reinforcing effect and provides a new idea for stone arch bridge strengthening.