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中文摘要：
采用FLAC3D建立压力分散型锚索在不同的承载板间距和数量下的模型,对比其轴向应力与剪应力以及位移曲线,总结出承载板的间距与数量对压力分散型锚索受力性能的影响规律。在此基础上,为改善传统的压力分散型锚索各级钢绞线在变形中受力不均的缺陷,提出了优化的承载板布置方案,即梯级布置方案。并通过建模计算证明,此方案可以使注浆体更不易在孔底被压碎,也更不易产生滑移破坏,改善了结构的受力,提高了安全性。
英文摘要：
The FLAC3D program is used to build the couple models of pressure-dispersive anchors, which are in different spaces or numbers of bearing boards. By contrasting the axial stresses, shear stresses and the displacement curves, the influences of the spaces and the numbers of bearing boards to the stress behavior of the anchors are summarized. On this basis, to improve the defect in uneven stress for the steel stranded wires with different length when the structure suffered from deformation, a proper proposal for the layout of the bearing boards called stepped-pattern scheme is suggested. The proposal is proved by the modeling and calculating in which the grouted body could not be crushed in the bottom and the anchors could not be slipped to failure easily. Thus the structural working behavior is enhanced and the safety margin is increased.
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