Study And Optimization Of Deformation Characteristics Of Formwork Support System Of Multi-compartment Pipe Gallery

Underground utility tunnel has become one of the important contents of urban infrastructure construction.However,in the process of underground utility tunnel construction,there are some problems such as in-situ bloated concrete and instability of formwork support system.Therefore,it is of great engineering value to study the deformation characteristics and construction technology of the formwork support system of cast-in-situ concrete.Based on the 2019 world horticultural exposition in Beijing park outside the road three tank symmetric structure utility tunnel,the delay road two tank asymmetric structure based on the comprehensive utility tunnel project,through the total station,Vic-3 d field test,obtained the comprehensive utility tunnel walls bloated concrete information such as the serious position and relative difference,analyzes the utility tunnel condition and reason for the cast-in-situ bloated concrete.Finite element software Midas GTS NX was used to simulate the site construction of baikang road and yankang road utility tunnel.Through the selection of model parameters and lateral pressure values,the deformation law of the support system was obtained,and the simulation results were in good agreement with the field test results.Comprehensive simulation results and field test results,the structure of symmetric and asymmetric tank utility tunnel deformation characteristics of the concrete formwork support system optimization design templates support structure,put forward the reasonable step concrete pouring sequence,solved the problems of bloated concrete in construction,to the utility tunnel structure refinement of concrete construction technology to provide technical support.