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为研究新型旋喷搅拌加筋斜桩锚的承载机理与破坏模式,建立了旋喷搅拌加筋斜桩锚承载力计算的力学模型,并基于Mohr-Coulomb土压力理论推导出新型旋喷搅拌加筋斜桩锚极限承载力计算公式,最后通过工程实例验证计算理论与公式的合理性.研究结论表明:旋喷搅拌加筋斜桩锚支护方式可有效提高软土地层预应力锚索的承载能力,对优化桩锚支护结构设计参数和提高围护结构综合效益具有重要意义.
In order to study the bearing mechanism and failure mode of the new rotary jet grouting stiffened inclined anchor, a mechanical model for calculating the bearing capacity of the screw-jet stir-stiffened inclined pile was established and a new type of rotary jet mixing and stirring was deduced based on the Mohr-Coulomb earth pressure theory The calculation formula of ultimate bearing capacity of inclined-skew pile is validated, and the rationality of calculation theory and formula is validated by engineering example.Research conclusions show that the supporting method of spiral-jet stiffened inclined pile can effectively increase the bearing capacity of prestressed anchor cable Ability, to optimize the design parameters of pile and anchor support structure and improve the overall efficiency of the envelope structure is of great significance.