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根据锚锭板、钢绞线与水泥土的相互作用机理,以弹性力学为基础,建立了拉拔荷载下三者的受力平衡方程。锚锭板受力采用弹性半空间的Boussinesq解,钢绞线握裹力采用忽略水泥土体的无旋应变下的变形协调平衡方程,并以三者的协调变形为前提,利用传递矩阵方法,计算了土层中大直径锚杆内各锚锭板所受荷载和位移的关系。通过理论计算可知,靠近张拉荷载的锚锭板最先达到塑性,而后是距离较远的发挥其承载力,如果进一步考虑钢绞线握裹力的影响,当近张拉端锚锭板达到塑性时,较远处锚锭板构件承载力的发挥程度将进一步减小。
According to the interaction mechanism between anchor plate, steel strand and cemented soil, based on elasticity mechanics, the force equilibrium equations of the three under tension load are established. The stress of the anchor plate is determined by the Boussinesq solution of the elastic half-space, and the strand-holding force is based on the deformation coordination equilibrium equation without plastic deformation of the cement-soil under the precondition of the coordinated deformation of the three. By using the transfer matrix method, The relationship between load and displacement of each anchor plate in the large diameter anchor in soil is calculated. The theoretical calculation shows that the anchor plate close to the tensile load first reaches the plasticity and then the bearing plate is far away from the bearing capacity. If further consideration is given to the influence of the strand wrap strength, when the anchor plate near the tension end reaches Plasticity, the greater the bearing capacity of the anchor plate member will further reduce the degree of play.