Analysis of deformation and internal force of pile-anchor-slope composite retaining structures for deep foundation pit
The force and deformation of combined pile-anchor slope retaining structure in deep foundation pit are affected by many factors.Based on a deep foundation pit project in a complex environment and PLAXIS 2D finite element software,the finite element model of the composite support structure of pile-an-chor-slope was established.By setting different slope height,slope rate and platform width,the influence rules of the above factors on the deformation of foundation pit,horizontal displacement of supporting pile,internal force of supporting pile and stress of anchor rod were analyzed.The results showed that the setting of platform has obvious unloading effect,and the change of platform width has important influence on the stability of foundation pit.With the increase of platform width,the available slope rate and slope height increase obviously.The slope height has obvious influence on the selection range of slope rate,and the deformation of foundation pit will increase sharply if the height is too large.The slope rate has a wide range of options,which can be flexibly selected according to the slope height and the setting of the platform.The results of this study can provide some guidance for the research and engineering application of pile-anchored-slope composite deep foundation pit support structure.
Pile-anchor retaining structureDeep foundation pitHorizontal displacementPlatform widthNumerical simulation
万方数据
维普
