Deformation Characteristics Analysis of Temporary Support in Unsymmetrical Loading Tunnel Excavation under Composite Support
نویسندگان
چکیده
Based on practical engineering, considering the characteristics of unsymmetrical loading, shallow burying, and weak surrounding rock tunnel, MIDAS finite element software is adopted to analyze influence effect deformation a temporary steel support when tunnel excavated by two-step center diaphragm method (CDM). The simulation results are compared with field monitoring results. It can be seen that: (1) Affected settlement right spandrel obvious. existence reduces at greatly, making distribution principal stress more reasonable. (2) upper bench undergoes four stages: convergence, expansion, stabilization; lower five stabilization. (3) There an obvious “bench-type” phenomenon in change support. analysis provide scientific basis technical guidance for construction optimization loading tunnels using same technology.
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ژورنال
عنوان ژورنال: Symmetry
سال: 2023
ISSN: ['0865-4824', '2226-1877']
DOI: https://doi.org/10.3390/sym15040830