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近几年来,新线桥梁建设中,钢筋混凝土梁式桥被广泛采用。为了确保行车安全,便于养桥部门对混凝土梁上可能出现裂纹的观测,和对旣有裂纹的处理,在较大跨度的梁上必须设置活动检查设备。最近,我们在沪宁复线某桥上,本着实践、认识,再实践、再认识的精神,和工人老师付一起试制了三孔20米低高度钢筋混凝土梁的活动吊栏检查设备。经安装使用,效果很好。我们认为这种形式的检查设备,对目前定型设计的各种较大跨度(10m以上)的钢筋混凝土梁具有一定的普遍性,现介绍如下:
In recent years, the new bridge construction, reinforced concrete beam bridge is widely used. In order to ensure the driving safety, facilitate the observation of cracks in the concrete girders by the bridge maintenance department and the cracked cracks in the concrete girders, active checking equipment must be installed on the beams with larger span. Recently, on the bridge of Shanghai-Nanjing Double-track Railway, we tried out the movable crane inspection equipment of three holes and 20 meters of low-height reinforced concrete beams together with the workers’ teachers in the spirit of practice, understanding, re-practice and re-understanding. After installation, the effect is very good. We think this form of inspection equipment has certain universality to various large-span reinforced concrete beams (more than 10m) of the current design, as follows: