河北工业科技2018，Vol.35Issue(4)：255-261,7.DOI:10.7535/hbgykj.2018yx04005
基于滑移线理论的支盘成型过程对桩周土的扰动分析
Impact analysis of the forming process of the squeezed branch pile on the soil around the pile based on the theory of slip line
张延庆 1文平1
作者信息
- 1. 北京工业大学建筑工程学院,北京 100124
- 折叠
摘要
Abstract
To obtain the optimal design of the squeezed branch pile,the disturbance of the soil around piles in the process of unidirectional extrusion and expansion of the squeezed branch pile is analyzed.Using the slip line field theory,the interaction force between the soil and the extruded arm is analyzed and simplified.To derive soil stress field,velocity field,soil ultimate load and the distribution of plastic zone under different extruding angles,the slip line field model of soil the unidirectional extrusion process of extruding the squeezed branch piles is established.Furthermore,the effects of forming process on the plas-tic zone of the soil around piles and soil flow under the tray are discussed.The results show that the depth of the affected soil under the tray calculated from the theoretical model matches well with the experimental results and the depth is between 0.47～0.49 m.As the distance from the extruded arm goes larger,the plastic flow velocity of soil becomes smaller and then the com-pacting effect of soil around the extruded arm is better.Moreover,the ultimate load of soil increases with the extrusion process. This paper has engineering values and can provide reference for the optimization design of branch piles.关键词
地下工程/支盘桩/滑移线理论/成型过程/速度场Key words
underground engineering/squeezed branch pile/slip line field theory/process of extruding/velocity field分类
建筑与水利引用本文复制引用
张延庆,文平..基于滑移线理论的支盘成型过程对桩周土的扰动分析[J].河北工业科技,2018,35(4):255-261,7.
