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Anchored and Statically Pressed Pile with Axial Prestress and Its Application in Uneven Settlement Treatment of Bridge Piles in Soft Soils

机译:轴向预应力锚固静压桩在软土桥梁桩不均匀沉降处理中的应用

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Uneven settlement of bridge piles in soft soil is usually treated by adding anchored and statically pressed piles. Due to the rebounding of newly added piles after the anchors are removed and other reasons, soil bulges or pile uplifts if they were located too closely often develop, which reduces their effects. To solve such problems, axial prestress can be applied during their construction. The structure of anchored and statically pressed piles with axial prestress is presented. The calculation of axial prestress is given by discussing the reason of rebounding of newly added piles. The pressing force can be increased if the total pile length is shorter than designed. If the actual pressing force is over 2.5 times of the allowable bearing capacity and the pile is still hard to be pressed, there is no need to continue the pile pressing.
机译:通常通过添加锚固和静压桩来处理软土地基中桥桩的不均匀沉降。由于移除锚点后新添加的桩会反弹,以及其他原因,如果它们过于靠近,则经常会出现土壤隆起或桩隆起,从而降低了其影响。为了解决这些问题,可以在构造过程中施加轴向预应力。介绍了具有轴向预应力的锚固和静压桩的结构。讨论了新加桩回弹的原因,给出了轴向预应力的计算方法。如果总桩长短于设计长度,则可以增加按压力。如果实际压紧力超过允许承载力的2.5倍,并且仍然难以压紧桩,则无需继续压桩。

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