群锚效应抗浮锚杆实用设计思路推导及应用研究

Derivation and Application of Practical Design Ideas for Anti-floating Anchor Rods with Group Anchoring Effect

锚杆作为一种常见抗浮构件,其周边土体常处于高应力受力状态。为发挥群体共同作用,锚杆布置间距通常较小,由此会产生“群锚效应”,即群锚总承载力小于每根锚杆承载力之和。常规设计中,考虑群锚效应时需不断地试算锚杆长度,从而确定群锚体有效自重,以验算锚杆设计是否满足稳定性要求。提出了一种考虑群锚效应的,相比常规设计思路更清晰、更简洁的锚杆长度直接计算方法,同时考虑长短锚杆间隔布置,以实现经济性。经实际项目验证,该设计方法可靠合理。

As a common anti floating component,anchor rods are often subjected to high stress in the surrounding soil.In order to exert the collective effect of the group,the spacing between anchor rod arrangements is usually small,resulting in the"group anchor effect",where the total bearing capacity of the group anchor is less than the sum of the bearing capacities of each anchor rod[6].In conventional design,when considering the group anchor effect,it is necessary to continuously calculate the length of the anchor rod to determine the effective self-weight of the group anchor body,and further verify whether the anchor rod design meets stability requirements.This study provides a clearer and more concise method for directly calculating the length of anchor rods that considers the group anchoring effect compared to conventional design ideas.At the same time,the spacing arrangement of long and short anchor rods can be considered to achieve economy.Through practical project verification,this design method is reliable and reasonable.