TBM管片混凝土配合比及蒸汽养护工艺参数的确定

Determination of Concrete Mixing Ratio and Steam Curing Technology Parameters of TBM Segments

在西藏林芝米墨公路项目的隧道施工中,采用了先进的TBM掘进技术,其中混凝土管片生产是保证整体隧道施工顺利进行的决定性因素之一。通过拌合不同水胶比的试配混凝土,经不同温度梯度对管片混凝土进行蒸汽养护,找出蒸养环境和混凝土强度、耐久性等性能之间的相互关系,从而得到满足混凝土管片设计要求的混凝土配合比、蒸养温度等TBM管片生产中需要的重要参数。

Advanced TBM tunneling technology is applied in the construction of the Mimo Highway Project in Linzhi of Tibet. The production of concrete segments is one of the decisive factors to ensure the smooth progress of the overall tunnel construction. By mixing concrete with different water and glue ratios, steam curing is carried out for the segment concrete through different temperature gradients, and the relationship between the steam environment and the properties of concrete strength and durability is found. Thus, the important parameters required in the production of TBM segments such as concrete mixing ratio and steam temperature which meet the design requirements of concrete segments are obtained.