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PDF(1620 KB)
PDF(1620 KB)
基于全寿命劣化分析的海底盾构隧道管片安全保障对策研究
Safety Guarantee Measures for Subsea Shield Tunnel Segments Based on Life Cycle Deterioration Analysis
管片接头是海底盾构隧道衬砌结构的薄弱环节，在海水的高压力与腐蚀环境的持续耦合作用下，其劣化性能严重影响整个海底盾构隧道衬砌结构的安全。本文在分析既有管片接头侵蚀劣化研究成果的基础上，引入隧道服役时间因素，建立可实现海水压力渗透与氯离子侵蚀的管片接头全寿命侵蚀劣化分析模型，分析了全寿命周期（100年）内海底隧道管片接头的渐进式侵蚀劣化规律，重点研究了海水压力与氯离子浓度对管片接头侵蚀劣化及钢筋锈蚀的影响，并基于全寿命周期内的侵蚀劣化分析，提出保障海底盾构隧道管片衬砌结构长期安全的最经济、最合理的对策。
The segment joint is the weak link in the lining structure of subsea tunnels, as it is under the continuous coupled effect of high water pressure and the corrosive seawater environment. If its performance deteriorates, it will seriously affect the safety of the lining structure of entire subsea shield tunnels. Based on an analysis of existing research into segment joint erosion and deterioration, a tunnel service time factor is introduced. Considering the influence of seawater pressure infiltration and chloride ion erosion and migration, a model analyzing the erosion and deterioration of the segment joint over its whole life cycle was subsequently established. The law governing the progressive erosion and deterioration of the segment joints of subsea tunnels over the entire life cycle was analyzed. The effects of seawater pressure and ion concentration on the erosion, deterioration, and steel corrosion of segment joints were studied. Based on the analysis of erosion and deterioration over the entire life cycle, economic and rational measures to ensure the long-term safety of the segment lining structure of subsea shield tunnels were proposed.
盾构隧道 / 安全保障 / 劣化分析 / 离子侵蚀 / 管片接头
shield tunnel / safety guarantee / deterioration analysis / ion erosion / segment joint
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