After pass through analyze a lot of fact checking data, tunnel lining concrete thickness require could express by probability statistic.
在经过对大量的检测数据的分析后，隧道二次衬砌厚度的检测要求可采用数理统计方法表达。
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。
In the mountain tunnel construction, the secondary lining concrete crack is a certain universal quality problem.
在山岭隧道施工中，二次衬砌混凝土裂缝成为带有一定普遍性的质量问题。
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