Research purposes: The construction of tunnel entrance is the key part of the whole engineering.
研究目的: 隧道洞口段施工是整个隧道工程施工的关键.
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Presented conclusion may be used for reference by engineers in design and construction of tunnel.
分析了超挖回填层和不同回填材料对复合衬砌模型结构承载力的影响.提出的结论可供隧道设计、工参考.
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