Study on the Estimation of the Axial Resistance of Spiral Bar Based on Interaction with Ground
Study on the Estimation of the Axial Resistance of Spiral Bar Based on Interaction with Ground
复制标题
基于与地面相互作用的螺旋杆轴向阻力估算研究
DOI：
10.2473/shigentosozai.121.370
复制
发表时间：
2005
期刊：
影响因子：
--
通讯作者：
T. Goto
中科院分区：
文献类型：
--
作者：
A. Hirata;S. Kokaji;Kang Seong Seung;T. Goto
通常使用给地面施加预应力的钢丝和诸如岩石锚杆的钢筋来支撑岩石。在这项研究中，我们介绍了一种新的类型，而不是以前的一个，如岩石锚杆和锚索。我们把能给钢板以扭转力的杆叫做螺旋杆.螺旋锚杆具有较高的抗拔力，使用方便，与锚杆类似。当轴力作用在螺旋杆上时，由于螺旋杆的螺旋形状，在注浆或充填材料固定时，会在钻孔中产生内力，本文对螺旋杆在轴力作用下的受力特性进行了实验研究。并采用有限差分法进行了三维数值分析。提出了一个计算任意尺寸螺旋杆轴向阻力的简单公式。估算结果与实验结果和数值分析结果吻合较好。
Steel wire, which gives a pre-stress to ground and steel bar such as a rock bolt, are generally used in order to support rock. In this study, we introduce a new type support instead of the former one, like a rock bolt and cable bolt. We call spiral bar the bar that give torsion to the steel plate. It is easy to use the spiral bar like rock bolt, since it has high pullout resistance from ground. If axial force acts on the spiral bar, inner force will arise in borehole because of the spiral shape when grouting or a filling material fixes it. The behavior in the case that the spiral bar receives external axial force was investigated experimentally. And the 3-D numerical analysis was then performed by the finite difference method. A simple equation to estimate axial resistance of arbitrary sized spiral bar with self-enhancement function is proposed. The result of estimation is agreement with one of the experiments and numerical analysis.