There are multiple sources of risk in segmental tunnelling, so analysis is made of the source of leakage risk from the tunnel tail sealing.
盾构法隧道施工风险源具有多维性，为此对盾尾密封渗漏风险源进行分析。
Uncertainties in the occurrence of the leakage, the intensity of leakage source, and the diffusion model in the process of the risk assessment of urban gas leakage are discussed.
讨论了燃气泄漏事故风险评价中泄漏的发生、泄漏源强度、扩散模式的不确定性问题。
The paper discussed the uncertainties of the leaking source intensity, the diffuse models and the injury models on the processes of the risk assessment of pipeline gas leakage accidents.
讨论管道煤气泄漏事故风险评价过程中泄漏源强度、 扩散模式和伤害模式的不确定性问题。
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