沉埋隧道混凝土结构性能的研究

Research on the Behavior \= of the Concrete Structure in Immersed Tunnel

在荷兰不用外贴式防水层修建防水隧道已是司空见惯，这使得无裂纹混凝土的生产成为必要，并省去了复杂的浇筑程序，实现这一目标的有效措施是在与水化合时，对混凝土墙进行人工制冷，文中描述了实用的解决方法，并提出了与应力和变形有关的温度变化计算方法。

In the Netherlands,it has been common practice to build immersed tunnels without an external membrane to provide a watertight structure.This entails the production of a cracke-free concrete prefectably without the use of complicated casting procedures.An effective measure to achieve this goal is adopting artificial cooling of the concrete of the walls during hydration.A method has been developed to calculate temperature development,resulting stresses and deformations.\=In the past,the shear capacity of the concrete itself has been considerably overestimated for some types of structures .New insight into the actual behavior of reinforced concrete exposed to shear has led to the development of special rules for calculating the shear capacity and shear reinforcement for tunnelstructures.\=