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Early-age behaviour of precast concrete immersed tunnel based on degree of hydration concept

机译：基于水化度概念的预制混凝土沉管隧道的早期行为

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摘要

Using the Hong Kong-Zhuhai-Macao Link project as an example, the focus of this research is to describe the early-age behaviour of a precast immersed tunnel using a constitutive model based on the degree of hydration concept. In this way, the effect of both age and temperature on the early-age behaviour can be taken into account simultaneously. Special attention is also paid to early-age creep under varying stress levels combined with the degree of hydration concept. Numerical procedures are proposed to predict the early-age behaviour of immersed tunnel segments during the entire fabrication process. The engineering factors related to early-age cracking are analysed and discussed. This in-depth study results in a better understanding, and further appropriate practical measures can be employed to control early-age cracking in the actual project.
机译：以香港-珠海-澳门铁路项目为例，本研究的重点是使用基于水化程度概念的本构模型描述预制沉管隧道的早期行为。这样，可以同时考虑年龄和体温对早期行为的影响。还应特别注意在不同应力水平下的早期蠕变以及水合度的概念。提出了数值程序来预测整个制造过程中沉浸隧道段的早期行为。分析和讨论了与早期裂纹有关的工程因素。这项深入的研究有助于更好地理解，并且可以在实际项目中采用更多适当的实际措施来控制早期裂缝。

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