悬臂式挤扩支盘桩的支护特性模型试验

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中图分类号： TU46+3 文献标志码：A 文章编号：1672-1098（2025）02-0068-08

引文格式：，，，等.悬臂式挤扩支盘桩的支护特性模型试验［J].安徽理工大学学报（自然科学版），2025，45（2） ：68-75.

Model Test on Retaining Characteristics of Cantilever Squeezed Branch Pile MA Hongwei， WANG Lina，CHEN Xin，ZHANG Weiqiang

lof Civil Engineering and Architecture，Anhui Universityof Scienceand Technology，Huainan Anhui 232Ool，China）

ibstract ：Objective In order to reveal the mechanism of squeezed branch piles in foundation pit support systems

Methods A 1：15 scaled model test was designed based on similarity theory. Layered excavation under cantilever pile support was conducted to analyze the efects of branch depth on pile-top displacement，bending moment and ground setlement.Results Compared to straight piles，the squeezed branch piles reduced horizontal displacement by 19.2% ，peak bending moment by 36.6% and settlement by 29.2% . Optimal performance occurred when branches were near the pit botom.Conclusion The buried depth of squeezed branch significantly influences support efficacy，and the rational depth selection enhances pit stability.

Key words ： geotechnical engineering;foundation pit support; model test;squeezed branch pile

基坑工程是建（构）筑物施工中难以避开的一项危险性较大的分部分项工程。（剩余8204字）