锚杆对双排桩结构变形和受力影响分析

发布时间：2018-04-23 14:26

本文选题：双排桩 + 锚杆　；参考：《岩土力学》2014年S2期

【摘要】：采用适用于敏感环境下基坑数值分析的硬化类弹塑性本构模型,针对锚杆对双排桩变形和受力的影响进行数值模拟。分析表明:锚固角度的增加能有效减小双排桩的最大水平位移和后排桩的桩身控制弯矩,但减小幅度随锚固角度增大而减小;在实际设计中,在周边环境允许的条件下,应尽可能增加锚杆与后排桩的夹角。锚固力的增加对双排桩结构的变形控制作用明显,能显著降低桩身最大水平位移,减小幅度也随锚固力的增加而减小;锚固力较大时会增大桩的控制弯矩,使桩的截面或配筋增加;在实际设计中,锚固力不应过大,可随信息化施工对基坑变形进行主动控制。
[Abstract]:A hardening elastoplastic constitutive model suitable for numerical analysis of foundation pit in sensitive environment is used to simulate the effect of anchor rod on deformation and force of double-row piles. The analysis shows that the increase of anchoring angle can effectively reduce the maximum horizontal displacement of double-row pile and the controlling moment of pile body in the back row pile, but the decreasing amplitude decreases with the increase of anchoring angle, and in the actual design, the maximum horizontal displacement of double-row pile and the controlling moment of pile body in the rear row pile can be reduced under the condition of the surrounding environment. The angle between anchor rod and rear pile should be increased as much as possible. The increase of anchoring force can obviously control the deformation of double-row pile structure, which can significantly reduce the maximum horizontal displacement of pile body and decrease the amplitude with the increase of anchoring force, and when the anchoring force is larger, the controlling bending moment of pile will be increased. In the actual design, the anchoring force should not be too large, and the deformation of foundation pit can be actively controlled with the information construction.
【作者单位】：中国建筑股份有限公司技术中心;
【基金】：中国建筑股份有限公司科技研发课题(No.CSCEC-2014-001,No.CSCEC-2010-002)
【分类号】：TU473.1

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