岩土工程学报2026，Vol.48Issue(4)：781-792,12.DOI:10.11779/CJGE20250312
连续球体型锚杆群锚效应模型试验研究
Experimental study on anchor group effect of continuous ball shaped anchors
摘要
Abstract
To investigate the group effect of multi-expanded body anchors,continuous spherical expanded anchors are studied through a series of pull-out model tests on anchor groups.Tests are conducted with varying spacing ratios(S/D=2,3,4),different embedment depths(0.22,1.9,2.4 m),and different arrangement configurations(parallel layout,staggered layout,inclined arrangement).The characteristics of the load-displacement relationship curves during pull-out and the deformation mechanisms of the surrounding soil are analyzed.The influence patterns of different spacings,embedment depths,and arrangement configurations on the group effect are explored.The test results indicate that the embedment depth of the anchor group significantly affects the extent of the soil displacement influence zone around the anchors.Under shallow embedment conditions,the soil displacement influence zone is the largest during the elastic stage and gradually decreases thereafter.Under deep embedment conditions,the influence zone is the largest during the elastoplastic stage,with subsequent incremental displacement analysis showing a characteristic pattern of initial expansion followed by contraction.Furthermore,adjusting the anchor arrangement configuration can effectively mitigate the negative impact of the group effect on the system's bearing capacity.Taking the case of S/D=4 at an embedment depth of 2.4 m as an example:the staggered arrangement reduces lateral disturbance to the bearing capacity of the soil between anchors.Compared to the parallel arrangement,the group effect coefficient increases by 5.3%,and displacement control is improved by 18.5%,demonstrating both high bearing capacity and displacement stability.When using inclined arrangements(10°,20°),the group effect coefficient increases by 2.94%and 5.15%,respectively.关键词
群锚/抗浮锚杆/群锚效应/抗拔承载力/PIVKey words
anchor groups/anti-buoyancy anchor/group effect of anchors/uplift bearing capacity/PIV分类
建筑与水利引用本文复制引用
陈晨,张长轩,刘哲,胡耀中,杨俊超..连续球体型锚杆群锚效应模型试验研究[J].岩土工程学报,2026,48(4):781-792,12.基金项目
国家自然科学基金面上项目(52278369) （52278369）
广州市市政集团科技计划项目(2024-SZKJ02)This work was supported by the National Natural Science Foundation of China(Grant No.52278369)and Guangzhou Municipal Engineering Group Ltd..Science and technology plan projects(Grant No.2024-SZKJ02). （2024-SZKJ02）
