压力型锚杆锚固段锚固效应特性分析

Anchoring effect of pressure-type anchor rods on anchored section

压力型锚杆作为新型锚杆型式,克服了拉力型锚杆黏结应力峰值突出、防腐性能较差、杆体无法拆除等性能缺陷,具有独特传力机制和良好工作性能。利用无限体内一点受集中力作用的Love位移与应力函数解,推导出浆体与岩土体界面间的位移及剪应力分布曲线,以及通过使用Mathmatica及Matlab等数学工具求出锚固体周边岩土体内各点的位移等值线,并采用Ansys数值模拟方法进行验证,得出压力型锚杆锚固段的锚固效应特性。

The pressure-type anchor rod, a new rod type, conquers the performance deficiencies of stretched rods, such as conspicuous peak values of bond stress, poor antiseptic property, inconvenient dismantlement of rod body, and so on. Such type anchor rod is of particular mechanism and good service ability. Utilizing the function solution of Love displacement and stress of a node in the infinite body under single force, the distribution of shear stress and displacement around the anchoring section is deduced. Using the mathematic tools of Mathmatica and Matlab, the displacement isoline of the rock and soil around the anchorage is obtained. The conclusion is validated by the numerical simulation of Ansys. The characteristics of anchoring effect are given by comparing the theoretical results with the simulated ones.