Research To The Deep Foundation Pit’s Deformaiton Under The Anchor-inner Support System Of Underground Continuous Wall

With the rapid development of economy and urbanization, deep foundation pitengineering became one of the hottest topics in geotechnical engineering. While thefoundation pit is going deeper and deeper under ground, the environmentalrequirements around them are becoming stricter and stricter, which leads deepfoundation pit engineering to develop into deformation control. As the same time,choose of deep foundation pit retaining structure and soil parameter is becoming moreand more careful resulting in the increase of the costs. So how to make thedeformation control more effective and economical and the construction simpler withthe safety insurance of foundation pit and full use of advantages of different kinds ofsupport systems becomes the new course.This research is based on the influence of excavation on foundation deformationin the case of hybrid support system of the underground continuous wall in PaZhouPZB-1401Project. And it summaries some common hybrid support systems of theunderground continuous wall and analyses their mechanical properties.Firstly, it analyses the monitoring data of PaZhou PZB-1401’s deep foundationpit project. Then it summaries the deformation law and anchor cable internal force ofwalls after excavation, the transformation law of support internal force within theconcrete and the law of settlement of piles.Secondly, it uses the MIDAS/GTS to set a model and it fits the deformation lawof deep foundation pit with anchor support system. And it studies the deformation law.It studies the some factors’ effects on the the foundation deformation, such as theunderground continuous wall stiffness and embedded depth, support stiffness and setsites. Also, it considers deformation laws of deep foundation pit with hybrid anchormixed-support system and full support system. Then it proposes some controlmeasures for deformation law of deep foundation pit with hybrid support systems ofthe underground continuous wall.At last, the paper makes a conclusion and points out some deformable features of deep foundation pit with hybrid anchor mixed-support system.