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随着我国铁路建设向现代化发展,线路要求日益平顺,大跨高墩不断出现,因而将会更广泛采用圬工量少、施工快的空心墩。近十年来已建成的空心高墩约有二百余座,今后将会越来越多。此外,类似于空心墩的大型电缆塔、电视塔、升船机塔架、大型蓄水池、筒仓等钢筋混凝土结构,也将日益增多。这种圆形空心墩混凝土结构,在长时间的日照作用下,内外壁面的温差较大,产生相当大的温度应力。这一温度应力有可能接近混凝土的极限拉应力,以致使结构发生裂纹。近几年来,国外工程界对一些类似空心墩的电视塔、冷却塔等钢筋混凝土结构物,
With the railway construction in our country being modernized, the requirements of the line are getting more and more smooth, and the high pier with large span appears constantly. Therefore, hollow piers with less construction and quick construction will be widely adopted. Over the past decade has been built hollow high pier about 200 seat, the future will be more and more. In addition, similar to the hollow pier of the large cable tower, TV tower, ship lift tower, large reservoirs, silos and other reinforced concrete structures, will also be increasing. This circular hollow pier concrete structure, under long-term sunshine, the temperature difference between the inner wall and the outer wall is relatively large, resulting in considerable temperature stress. This temperature stress may be close to the ultimate tensile stress of concrete, so that the structure cracks. In recent years, the foreign engineering community for some similar hollow pier TV tower, cooling tower and other reinforced concrete structures,