Safety assessment of concrete pipeline considering the effect of pipe diameter subjected to blasting vibration

Abstract

Urban concrete pipelines are prone to damage in blasting projects such as excavation of adjacent metro tunnels. Therefore, it is necessary to evaluate the safety of buried concrete pipeline subjected to blasting vibration. Based on the field blasting test of full-scale buried concrete pipeline, considering the factor of pipeline diameter, the dynamic response of concrete pipelines with different diameters was studied by using finite element software ANSYS/LS-DYNA. According to dimensional analysis, a prediction model of particle peak velocity (PPV) considering pipeline diameter was established. Combined with the tensile strength of concrete, the safety criterions of PPV for concrete pipeline with different diameters were proposed, which provided guidance for actual blasting.