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铁路拱桥以往多用石拱桥,但石砌圬工的抗拉性能很差,只能做成实体重型结构,跨越能力有限。随着跨度的发展,钢筋混凝土拱桥取代石拱桥或无筋混凝土拱桥是必然的趋势。解放以前,我国仅有钢筋混凝土拱桥339孔,其中日本侵略东北时修建的有161孔,大部分集中在沈吉线上(计122孔)。跨度最大的是粤汉线株韶段五大拱桥中的碓硙冲桥、省界桥及燕塘桥,净跨达40m。这些拱桥都是实腹式板拱,拱轴线多为半圆或圆弧。拱圈采用1:2:4混凝土,强度很低。
In the past, the railway arch bridge used more stone arch bridges, but the stone masonry had poor tensile properties and could only be made into a solid heavy structure with limited ability to cross. With the development of span, the replacement of stone arch bridge or non-reinforced concrete arch bridge by reinforced concrete arch bridge is an inevitable trend. Before liberation, there were only 339 holes of reinforced concrete arch bridge in our country, of which 161 were built when Japan invaded northeast China, most of which were located on Shenji line (122 holes in total). The largest span of the Yuehan line strains Shaoguan five arch bridge in the Qionglai Bridge, the provincial boundary bridge and Yantang Bridge, net span of 40m. These arches are solid abdominal panels arch, arch axis mostly semi-circular or arc. Arch ring with 1: 2: 4 concrete, low intensity.