加栓钉对高应力区插筋SMW工法的影响研究

针对传统高应力区插筋的SMW工法中型钢与水泥土的自然粘结较弱、不足以保证组合梁在大荷载时界面处有足够的共同作用的缺点,提出了在SMW工法型钢翼缘焊接栓钉的方法。并对型钢翼缘侧焊接栓钉的高应力区插筋的SMW工法进行了理论分析和ABAQUS有限元计算。通过理论分析,引入栓钉-水泥土-型钢组合结构概念,并建立了型钢-水泥土-栓钉三者相互作用的结构力学模型和抗弯承载力验算公式;数值计算结果则表明,焊接栓钉后,挡墙侧向位移、型钢位移、交界面的剪切力都比无栓钉情况有较好改善,最后计算并分析了不同栓钉特性对桩体位移、剪切力方面的影响。

Effect of Studs on Reinforced Soil-cement Retaining Wall in High Stress Area

Natural bond between steel and soil cement can not provide enough bonding strength to the interface of traditional reinforced soil-cement retaining wall in high stress area.For this weakness,a solution to this problem is given—welding studs on steel flange.The theoretical analysis and ABAQUS finite element numerical computation are given to the reinforced soil-cement retaining wall in high stress area with welding studs on steel flange.Through theoretical analyzing,a studs-steel-cemented soil compound structure concept is introduced,and a mechanical model for interaction of these three elements is established,a checking formula in flexural bearing capacity of composite beam with studs is obtained;Numerical results show that the condition of lateral displacement of retaining wall and profile steel,and shear stress at interface is better than that of the wall without studs.Finally,the effects of lateral displacement of retaining wall and shear stress with different characteristics of studs are given.