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Verification of thermal restraint of a railways trough structure by long-term monitoring

机译：通过长期监测验证铁路槽形结构的热约束

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摘要

At the central railway station of Berlin a trough structure was erected to extend the tracks from the underground station to ground level. The trough is subjected to high ground water pressure. Safety against up-lift called for the coupling of the trough with the underwater concrete slab and the back-anchorage of the structure by piles. Such coupling leads to high restraint due to hydration of the concrete and the ambient weather. Analysis required assumptions regarding the interaction between the trough and the impeding substructure, as well as the stipulation of load-independent design actions based on meteorological studies. The owner decided to install a long-term monitoring system in order to verify the thermal and mechanical response of the structure. However, the main goal of monitoring is the improvement of specifications for design and tender of future structures with comparable complexity. The program and the monitoring techniques will be described, and specific results will be reported. Preliminary conclusions are drawn.
机译：在柏林中央火车站，竖起了一个槽形结构，将轨道从地下车站延伸到地面。该水槽承受着很高的地下水压力。为了防止隆起，要求将水槽与水下混凝土板连接起来，并通过桩将结构背固定。由于混凝土的水合作用和周围的天气，这种耦合导致很高的约束。分析需要关于水槽与障碍物下部结构之间相互作用的假设，以及基于气象研究的独立于荷载的设计行为的规定。业主决定安装一个长期监控系统，以验证结构的热和机械响应。但是，监控的主要目标是改进设计规范并招标具有类似复杂性的未来结构。将描述该程序和监视技术，并将报告特定结果。得出初步结论。

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