The Application And Research Of Retaining And Protecting With Reinforced Cement Soil Piles And Anchors In Shangshui Garden Foundation Pit

Foundation pit engineering is a focus of geotechnical engineering researchers.Considered as a new soil supporting and reinforcement technology,retaining and protecting with reinforced cement soil piles and anchors has the advantages of short construction period,low cost,wide range of application of the soil(such as thick soft substratum,sand and gravel layer)etc.However,in terms of design methods and construction practice,it is not mature yet.Therefore,it is very necessary to analysis the force and deformation systematically.This paper introduces the mechanism and main technical means of retaining and protecting with reinforced cement soil piles and anchors systematically,analyzes the application of retaining and protecting with reinforced cement soil piles and anchors in the foundation pit engineering of Nanchang Shangshui Garden emphatically.Besides,this paper calculates unit of this engineering by using Lizheng deep foundation pit 7.0,simulates and analyses foundation pit construction process three-dimensional-numerically by using Midas GTS NX,to obtain the lateral displacement of foundation pit and the force of supporting structure and deformation rule,At last,compare and analysis the calculating results of Lizheng,finite element calculating results and the actual monitoring results.Through establishing two-dimensional-finite element model,study the different design elements,such as embed depth of cement wall,section size and embedded depth of H type I-beam,horizontal inclination of anchor pile body,numbers of pile anchor supporting,which have influence on the displacement of retaining structure.Analysis result shows: the section size of embedding depth and type of I-beam have little effect on the lateral displacement of foundation pit,the embedded depth of the cement soil pile for foundation pit lateral displacement are less affected,On the other hand,the horizontal plane inclination and horizontal inclination supporting,numbers of cement soil anchor body have obvious effects on horizontal displacement.This paper provides a certain reference analysis results for the design and construction of similar projects.