DISPLACEMENT CALCULATION OF NEARBY UNDERGROUND PIPELINE CAUSED BY DEEP EXCAVATION BASED ON FIELD TEST OF GROUND DISPLACEMENT

Influence of foundation excavation on nearby underground pipeline is a key problem relating safe andeconomic construction of city foundation, which is a difficult and hot research subject． Based on the elastic foundationbeam theory proposed by the predecessors, the calculation method based on field test ground subsidence curve ofcalculating the influence of deep excavation on nearby underground pipeline was proposed． This method made up theshortage of supposing the ground subsidence curve above underground pipeline to be parabola, which made thecalculation result more accurate． Finally, the solution process of this method was illustrated through an engineeringexample． The vertical displacement equation of underground pipeline was obtained, and its value solution was solvedwith Matlab software, which was in good agreement with that of field test．