...衬砌裂缝成因；裂缝防治措施 [gap=1821]Key words：tunnel engineering；twin-arc highway tunnels；lining crack；cause of lining cracks；crack prevention ...
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As for hydraulic tunnel lining concrete, thermal stress is one of important factors that cause concrete cracks, due to the heat of hydration of cement in the construction period.
对于水工隧洞衬砌混凝土，在施工期由于水泥水化热作用，温度应力影响显著，是产生混凝土结构裂缝的重要原因之一。
Result of synthetically analyzing and mechanical computation turns out that the unsymmetrical load is the main cause of the cracks in tunnel lining.
经综合分析及力学计算，存在较大偏压是隧道衬砌产生裂缝的主要原因。
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