Analysis Of Excavating And Supporting The Shallow Underground Tunnel In The Soft Soil

Along with our country national economy development, the tunnel and the underground hole room form and the quantity increase day by day, the construction scale unceasingly expands, in aspect and so on energy, water conservation, transportation, communication, urban construction and national defense project obtains the widespread application, underground structure importance also even more obvious, in particular the large-scale tunnel and the underground hole room, choose reasonable excavates the cross section and supporting opportunity, may save the resources, causes the project investment to be more economical. The large-scale underground structure once loses steadily, the bitter experience destroys, stably will have the significant influence to the urban development and national politics. Thus, excavating and supporting the underground hole room have the important theory significance and the project application value.This article according to the finite difference analysis theory, separately the excavating form to under the static cross section and supporting opportunity, as well as under the earthquake function supporting and the stable surname carries on the analysis to the structure, establishes the reasonable computation model, with Fast Lagrangian Analysis of Continua method analyzes the underground hole room stability, The study could be summarized as the following four aspects(1) Uses one kind of commonly used underground hole room structure cross section form, utilizes Fast Lagrangian Analysis of Continua method, carries on the computation to the underground hole room and the adjacent formation stability, and carries on the contrast analysis with the analytic solution computed result, tallies well, indicated this article simplifies the processing method the rationality and the computation model feasibility.(2) Uses the plastic model to carry on excavating supporting analysis, discusses each kind of factor to the underground hole room stable influence, for example: The adjacent formation material quality, the hole room burying depth, the soil layer distribution condition and the cross section form and so on, and through to the hole room stress, the displacement, result the and so on adjacent formation plastic area analysis, the discovery hole room adjacent formation confrontation structural stability response quite are big.(3) Considered the hole room adjacent formation material changes the characteristic, uses the rheology model, and the supporting form carries on the analysis to one kind of...