论文部分内容阅读
锚索锚头的设计,通常以使垫墩与围岩接触面的应力不致引起锚头破坏或产生较大位移为准,但对锚头施加预应力后,周边岩土体中会产生附加应力和位移,这类问题的研究尚未在相关文献中发现。本文采用弹性半空间边界上某一点受集中力作用的Boussinesq解,推导了预应力锚索锚头周边岩体的附加应力和位移分布的理论解,并讨论了锚头尺寸和岩土体的力学参数对轴应力和位移的影响。结果表明,在施加预应力后,锚头周边形成了一个锥形的压应力场,并随着远离锚头而迅速衰减。最后,将理论分析和数值模拟结果进行了对比,表明本文的理论推导是可行的,其结果可以方便地应用于工程设计。
Anchor head design is usually so that the pad pier and the surrounding rock contact surface stress will not cause damage to the anchor head or produce a larger displacement prevail, but the prestressed anchor head, the surrounding rock and soil will have additional stress And displacement, the study of such problems has not yet been found in the relevant literature. In this paper, the Boussinesq solution of a certain point on the elastic half-space boundary subject to the concentrated force is used to deduce the theoretical solution of the additional stress and displacement distribution of the rock mass around the prestressed anchor head. The relationship between the anchor head size and the mechanics of rock and soil mass Influence of Parameters on Axial Stress and Displacement. The results show that after the prestressing, a conical compressive stress field is formed around the anchor head and decays rapidly with the distance away from the anchor head. Finally, the theoretical analysis and numerical simulation results are compared, indicating that the theoretical derivation of this paper is feasible, the results can be easily applied to engineering design.