双排桩复合锚固支护体系的数理模拟分析研究

Mathematical Simulation Analysis and Study on Double-row Pile Composite Anchorage Support System

以有限元数理模拟分析的方式,对双排桩复合锚固支护体系的功效特点开展有针对性的数理模拟分析,结果表明:双排桩复合支护体系相对更应力均衡,此结构的最大位移通常于桩顶以下20 cm～40 cm区间发生,弯矩最大值无论正值还是负值在前排桩始终比较接近。但在后排桩这里,悬臂构件受力特征显著,存在较大受力差异,并且最大位移多在桩顶处发生;双排桩复合锚固支护中,在冠梁设置锚点,其约束效果相对更好,锚点在冠梁设置,其抗拉拔功效更能得到发挥,对形变约束要更为有效。双排桩复合支护体系中以增加多排锚杆来约束形变的作用效果并不理想,双排桩复合支护体系的形变约束,重点应在第一排锚杆,冠梁处设置锚点约束效果明显。以期为同类工程技术应用提供研究和技术参考。

Based on the finite element mathematical simulation analysis method,the mathematical characteristics of the double-row pile composite anchoring support system are analyzed.The results show that the double-row pile composite support system is relatively more stress balanced,and the structure is the largest.The displacement usually occurs in the range of 20cm^40cm below the top of the pile.The maximum value of the bending moment is always close to the front pile.However,in the rear pile,the cantilever members have significant force characteristics,and there are large differences in force,and the maximum displacement occurs at the top of the pile.In the double-row pile composite anchoring support,the anchor point is set in the crown beam,and its restraining effect Relatively better,the anchor point is set in the crown beam,and its anti-drawing effect can be more effectively exerted,and the deformation constraint is more effective.In the double-row pile composite support system,the effect of increasing the multi-row bolts to restrain the deformation is not ideal.The deformation constraint of the double-row pile composite support system should focus on the first row of anchors and the anchor points at the crown beam.The constraint effect is obvious.In order to provide research and technical reference for similar engineering technology applications.