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建造预应力钢筋混凝土长线台座最麻烦的就是在浇捣预应力台面之前必须先浇好合座二端的台墩混凝土,并经养护后才能张拉台面预应力筋、浇捣台面混凝土。这样势必影响整个工期;同时,在张拉预应力台面的预应力筋时,由于无坚实的支承点,二端台墩就会有倾覆和滑移的危险性,滑移的可能性更大。为防止发生这种情况,一般采取那大台墩与地基的接触面积,尽量增大台墩和
The most troublesome problem in building a prestressed reinforced concrete long-line pedestal is that the concrete of the pedestal at the two ends must be poured before the pre-stressed concrete table is poured. After curing, the prestressed tendons on the table can be tensioned and concrete can be poured. This will inevitably affect the entire construction period; at the same time, when tensioning the prestressed ribs of the prestressed deck, due to the lack of solid supporting points, the two-end pedestal piers will have the danger of overturning and slipping, and the slippage is more likely. In order to prevent this from happening, the contact area between the big pier and the foundation is generally adopted to increase the size of the pier and