Influence of pit excavation supported by cantilever piles on adjacent buried pipelines

MIDAS GTS software was used to build a 3D finite element model to analyze the influences of such factors as excavation depth, pile diameter, pile spacing, pipeline-to-pile distance, pipeline buried depth and soil elastic modulus on buried pipelines. It is found that the horizontal and vertical displacements of pipelines at the corner of the foundation pit are about 1/2 of those at its center. The maximum horizontal displacement happens when the pipeline buried depth is 1/3 of the foundation pit, and the vertical displacement decreases with increasing pipeline buried depth. When the pipeline diameter increases from 0.6 m to 1.2 m, the horizontal displacement changes little, but the vertical displacement decreases to half of the original. As the soil elastic modulus increases, the medium displacement of pipelines decreases obviously, and the horizontal displacement is about 4 times as large as the vertical displacement.