Dynamic response and safety assessment of inner‐wall corroded concrete pipeline in service subjected to blasting vibration

Abstract

Buried pipelines in urban area are prone to corrosion defects for many years. Ensure the safety of buried corrosion pipelines is a key concern during tunnel blasting excavation. Based on the blasting engineering along Shenzhen Metro Line 12, the field test of full‐scale concrete pipeline adjacent blasting was implemented. The dynamic response of concrete pipeline induced by blasting vibration was analyzed by using the dynamic finite element numerical simulation method, and the reliability of numerical simulation was verified by the field monitoring data. On this basis, considering the corrosion defect morphology of pipeline, the distribution characteristics of peak particle velocity and peak effective stress of concrete pipeline with different corrosion depths, corrosion widths, and corrosion lengths induced by blasting vibration were discussed. The parameter analysis method was used to research the influence of corrosion morphology parameters on the dynamic response of the pipeline, and the corrosion depth of the inner‐wall of the pipeline was defined as the main control parameter of the dynamic response. According to the failure criteria of concrete materials, the safety criterion of corroded concrete pipelines with different service years subjected to blasting vibration was established.

Green demolition technology of reinforced concrete slab: Application of soundless chemical demolition agents and its evaluation system

“…In the current demolition industry, blasting is always selected by construction contractors because of its time efficiency and short progress 5 . However, a huge amount of vibration, noise, dust, and flying stones are produced during the blasting demolition of buildings 6–9 . The damage to the human living environment caused by massive building blasting demolition is very serious and has become one of the key factors limiting the sustainable development of cities 10–12 .…”

“…5 However, a huge amount of vibration, noise, dust, and flying stones are produced during the blasting demolition of buildings. [6][7][8][9] The damage to the human living environment caused by massive building blasting demolition is very serious and has become one of the key factors limiting the sustainable development of cities. [10][11][12] Therefore, there is an Discussion on this paper must be submitted within two months of the print publication.…”