The Modle Study And Simulation Of Suporting System By Composite Soil Nailing Wall With Mini-sized Steel Tube Piles

Traditional soil-nailing wall developed rapidly in Chinese civil engineering sphere due to its simple construction which is also fasU low amount of material and financial investment as well as weighing light, but on the other hand, it’s unavailable in projects with a deep foundation pit because of its capability. So. in order to widen the applicability of soil-nailing wall while retain its advantages, a kind of structure named as composite soil-nailing wall was proposed. Mirco-steel tube piles composite soil-nailing wall support, which is referred hereinafter, is composite form of soil-nailing wall support combined with soil-nails、micro-steel tubes、concrete surface and the soil itself.In this article, firstly a scale model indoor is constructed for model test based on the completed foundation engineering of Nanchang Tianyu National Hotel, in the test, a series of monitoring points was set on the steel tubes%the soil nails and inside the soil to get data for analyzing with static multi-functional test system. Secondly, an analogue simulated model built by FLAC3D (a numerical simulation software) was used to carry on the simulation calculating, the extracted result will be compared with the result of the scale model testing. Last but not the least, a discussion on how every structure part of the composite soil-nailing wall support system affects the stability of the whole system was proposed and further analysis was made to help optimize the design of constructions under similar conditions in future.The results of this research can be summarized as follows:(1)1have designed and produced a scale model of indoor about composite soil nailing wall system, by reversing the actual excavation process and collecting the changing datd from dependent artifacts of support system.I can research and analysis.(2) Conduct the three-dimensional numerical simulation of Indoor model by using FLAC3D simulation software.confirm the mutual authentication rationality and feasibility of the model tests and numerical software simulation at the same time. (3) Using FLAC3D numerical simulation software to simulate the actual project, analysis the stability of foundation by changing the influencing factors of related components from the miniature steel pipe piles composite soil nailing wall system.