Numerical Simulation Study On Under Digging Mechanization Method Of Xi’an Metro New Botanical Garden Station

With the increasing urbanization of my country,the subway construction project is gradually entering the period of the major development,and the subway station has a very important means in which the subway station is in the case,in order to be more effective and effective,fully combined with the ground underground resources.Engineering designers have never stopped.This paper relies on the subway construction project of Xi’an Metro New Botanical Garden Station,using the numerical simulation software of MIDAS-GTS geotechnical engineering,combined with theoretical analysis,etc.The surface deformation and structural force risk control point prediction result of the PBA work method,and proposes guidance.After the excavation,the collapsibility of the right soil layer of the basement is analyzed,and the stress and deformation characteristics of the station structure and surrounding rock with different collapsibility depths are obtained;combined with 6 guided PBA method and 8 guided PBA method for the formation of different sectional type and guided construction process surface structure Deformation force analysis,obtained the result of the strategy deformation under the four working conditions,in terms of the final settlement amount,first down then up 6 guides>First up then down 6 guides>First down then up 8 guides>First up then down 8 guides,however,the implementation of the leading hole is not negligible,and the selection of the selection of the appropriate breakage is given by contrasting the changing changes in the absence of different working conditions.Effective,the lead-on-the-pull volume is large,try to choose the next step,the lower process of the leading hole can be appropriately selected to further control the terrestrial settlement of the ground,and talk about different dark excavation work.The stress characteristics of the formation structure in the construction process of the new tubing method,the strategy of the formation and tube structure of the new management method,pointing out that the selection of the appropriate top tube can be further controlled to further control the formation deformation,new tubing method The key stage of construction control ground settlement is mainly in the internal soil excavation stage,and the deformation of the carrier arch system is mainly manifested in vertical,mainly from the underlying structure,"timely arched grouting,reasonable setting support and rapid enclosure arch)Control settlement method.