Research on the surface settlement and structural force during the construction of the combined structure

Abstract

The pipe screen structure proposed in this paper is a closed underground steel pipe and reinforced concrete combinedstructure including 20 steel pipes. The pipe screen - structure method (PSM) mainly includes three construction stages suchas steel pipe jacking, steel pipe cutting and concrete pouring, and earth excavation. The surface settlement and structural stresscharacteristics in the pipe screen structure method's construction process are investigated in this paper using numericalcalculations and field tests. The research results show that the pipe curtain structure method can effectively reduce the surfacesubsidence caused by construction, and the settlement induced in the first stage is the largest, followed by the second stage. The buried pipe curtain structure bears less load according to the measured data. The stress concentration at the connectionpositions between the steel pipe and the steel plate is noticeable during the steel pipe cutting process. The steel pipe supportcolumn mainly bears the pressure, and its bending moment is small. The main reinforced concrete structure is less stressed,and the structural parameters can be further optimized.