Combined with the analysis of original stress state of existing tunnel considering segment joints, the important internal causes of crack are found out.
结合对考虑拼接缝的既有隧道管片受力状态的分析，找到裂缝隔片产生在连接块上的重要内在原因。
Based on the members' stress in the new and original load conditions, the evaluation and analysis on the actual state of headframe was obtained.
通过增大提升能力前后不同荷载下的构件应力对比，对增大提升能力后的井架的运行状况做出预估与分析。
Based on the members' stress in the new and original load conditions, the evaluation and analysis on the actual state of headframe was obtained.
通过增大提升能力前后不同荷载下的构件应力对比，对增大提升能力后的井架的运行状况做出预估与分析。
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