After pass through analyze a lot of fact checking data, tunnel lining concretethickness 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。
2
The gravel, grave cement and concretethickness are given for reference only; the final thickness will be accurately calculated according to Chinese regulation.
砂砾层，水泥稳定石层，和混凝土层的厚度仅供参考，最终将根据中国规范精确的测算出其各自厚度。
3
Another method is to pour the entire thickness of concrete and then force the steel mesh down into it to a predetermined level.