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首页> 外文期刊>The Open Civil Engineering Journal >The Monitoring and Feedback for the Construction Quality of the Mass Concrete Based on the Distributed Optical-Fiber Temperature Measurement System
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The Monitoring and Feedback for the Construction Quality of the Mass Concrete Based on the Distributed Optical-Fiber Temperature Measurement System

机译:基于分布式光纤测温系统的大体积混凝土施工质量监测与反馈

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Temperature control is a key factor which affects the construction quality of the mass concrete, which is also an important measure to prevent crack propagation. Lots of engineering practices show that most of temperature cracks come out in the form of the surface crack during the construction of the concrete dam. In addition, deep cracks and transverse cracks are usually developed by surface cracks. Strengthening conversation and surface insulation are one of the main methods to prevent surface cracks. In this paper, Xiluodu hydropower dam is taken as the engineering background, and an insulation monitoring experiment under the winter low-temperature condition was carried out on the fresh concrete layer during the construction period using the distributed fiber optic temperature monitoring system. The inversion of the equivalent heat coefficient for the fresh concrete layer with the covering of the polyethylene membrane insulation materials was conducted, besides the monitoring results and the feedback analysis of the conservation status was obtained based on the test data. The above procedure provides a basis for evaluating the quality of construction and the dynamic adjustment of the construction programs.
机译:温度控制是影响大体积混凝土施工质量的关键因素,也是防止裂纹扩展的重要措施。许多工程实践表明,在混凝土大坝建造过程中,大多数温度裂缝都是以表面裂缝的形式出现的。另外,深裂纹和横向裂纹通常由表面裂纹产生。加强对话和表面绝缘是防止表面裂缝的主要方法之一。本文以溪洛渡水电站大坝为工程背景,利用分布式光纤温度监测系统对新建混凝土层在施工过程中的冬季低温条件下进行了绝缘监测试验。除监测结果外,还对覆盖有聚乙烯膜绝缘材料的新鲜混凝土层的当量热系数进行了反演,并根据试验数据对养护状态进行了反馈分析。上述程序为评估施工质量和动态调整施工程序提供了基础。

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