Theory And Application Of Real-time Monitoring For Construction Quality Of The Working Unit Of RCC Dam

The construction of roller-compacted concrete (RCC) dam has the characteristics of complex process, tight schedule, high construction intensity and high technical requirement, which brings a great challenge to construction quality control of the working unit of RCC dam. Combining with the international frontier issues on construction quality control of RCC dam, research on construction quality control method of the working unit of RCC dam is carried on in this paper. The mathematical model and their application are carried out from multi-direction based on the real-time monitoring method for construction quality of working unit of RCC dam. The roller compaction quality real-time monitoring technique and the construction climatic information real-time monitoring technique are presented. Meticulous, all-weather and real-time monitoring for construction quality of working unit is implemented. Dynamic and efficient integration management and analysis to information of construction is realized. There are two significances. Firstly, the real-time monitoring method for construction quality of working unit of RCC dam is a theoretic extension of construction quality control method of the working unit of RCC dam. Secondly, a pioneering work is done on the establishment of real-time monitoring system for construction quality of working unit of RCC dam. The conclusions of this study are listed as follows.(1) The real-time monitoring architecture for construction quality of the working unit of RCC dam is built. The mathematical model of real-time monitoring for construction quality of the working unit of RCC dam is established.Aiming at the key scientific problems of construction quality control of the working unit of RCC dam, the key factors of construction quality control of the working unit is analyzed, such as target, elements and process. Research on the real-time monitoring method for construction quality of the working unit of RCC dam is carried on. The real-time monitoring architecture for construction quality of the working unit is proposed. The mathematical model of real-time monitoring for construction quality of the working unit is established, and the web-based 3D visualization analysis of the real-time monitoring is proposed.This real-time monitoring architecture is not only an extension of the current theory of construction quality control of the working unit of RCC dam, but also provides a new way to control construction quality of the working unit of RCC dam.(2) The roller compaction quality real-time monitoring technique is proposed. Auto identification of rolling layers and dynamic analysis of the monitoring indicators are realized.Aiming at real-time monitoring of the roller compaction quality, which is the core component of the real-time monitoring for construction quality of the working unit of RCC dam, the objective function for the roller compaction quality real-time monitoring is established. Auto identification method of rolling layers and method of dynamically analyzing the monitoring indicators are proposed. The roller compaction quality real-time monitoring system of RCC dam is developed, and the web-based management of roller compaction quality information of RCC dam is realized.This system is firstly applied in the roller compaction quality real-time monitoring of RCC dam and improves the level of roller compaction quality control. It is a tremendous innovation to construction quality control of RCC dam.(3) The construction climatic information real-time monitoring technique is proposed. The ANN model for feedback control, which can predict the loss quantity of VC value, is established.Aiming at real-time monitoring of the construction climatic information, which is an important component of the real-time monitoring for construction quality of the working unit of RCC dam, controlling objective function for the construction climatic information real-time monitoring is established. The ANN model, which is used to predict the loss quantity of VC value, is established for feedback control. The construction climatic information real-time monitoring system of RCC dam is developed.By introducing construction climatic information to real-time monitoring system for construction quality of working unit of RCC dam, the loss quantity of VC value is send to the construction managers, and feedback guidance is provided to the constructors. It is a new research direction to construction quality control of the working unit of RCC dam.(4) The real-time monitoring system for construction quality of working unit of RCC dam is developed. This system has applied to control construction quality of the high RCC gravity dam of a hydropower project successfully.The real-time monitoring system for construction quality of working unit of RCC dam is developed based on the characteristics of the high RCC gravity dam of a hydropower project locates in southwest China such as high temperature in summer, concentrated rainfall, large scale and tight schedule. Meticulous, all weather and real-time monitoring and analyzing for the key links of construction process of working unit are realized. The quality control level and efficiency are improved during construction.With this monitoring system, construction quality is controlled remotely, meticulously and real-timely, and the influence of personal factors is decreased. The basis is provided for construction and maintenance of working unit of RCC dam, and many precious technical data are provided for construction quality control of RCC dam. This successful case provides reference for construction quality control of working unit of similar RCC dam.