基于实时信息的高拱坝混凝土浇筑与温控方案动态反馈协同设计方法研究

In the construction process of high arch dams, formulation and modification period of concrete pouring scheme is long due to the narrow gorge and ever-changing environmental condition at dam site area. Meanwhile, temperature and crack control is crucial for quality control of arch dams. Therefore, it is critical to fully consider concrete pouring scheme and temperature control scheme, as well as targets of construction schedule and cost control, so as to formulate and optimize schemes quickly and efficiently in accordance with dynamic conditions at construction site. This research is taking concrete pouring and temperature control schemes as basic research objects, with construction quality and critical schedule points as mandatory constraints. Firstly, a data mining (DM) model is established for analyzing current state of concrete pouring and temperature based on knowledge base and real-time information of construction system. Secondly, a variable set and a constraint set are formed for feedback analysis with the Temperature Field and Construction Process Coupled Simulation Model established by the former research project (NO.51079079, supported by NSFC, 2011-2013). Next, influence law of concrete pouring and temperature control schemes upon pouring progress and cost of the whole arch dam is studied and a multidimensional evaluation system for construction scheme is proposed. Finally, combining with the multidimensional modeling and rendering techniques, a dynamic collaborative design model is set up. Moreover, the real-life projects named Xiluodu, Baihetan etc., are taken as study cases for validation and application of the models.

高拱坝工程通常施工场地狭窄，环境条件复杂多变，混凝土浇筑方案制订和修改周期长，同时温控防裂是其施工质量控制的关键。如何适应现场要素的动态变化，综合考虑浇筑方案、温控方案和坝体的进度、成本控制目标，快速制订和优化混凝土浇筑与温控方案，是高拱坝工程建设的重要课题。 本项目拟以高拱坝混凝土施工质量和控制工期为强约束，以混凝土浇筑与温控方案为基本研究对象，建立基于现场实时施工信息和知识库的数据挖掘模型，分析坝体当前浇筑状态和温控状态；构建浇筑与温控方案优化的可变参数集和约束集，利用已建的温度场与施工过程耦合仿真模型进行反馈分析；探索高拱坝混凝土浇筑及温控方案对全坝浇筑进程、成本的影响规律，建立浇筑方案与温控方案的多维度评价体系及模型。在此基础上，集成施工系统多维建模技术和情境绘制与渲染技术，构建高拱坝浇筑及温控方案动态协同设计模型，并结合溪洛渡、白鹤滩等工程进行模型验证与应用研究。

研究结合在建的金沙江溪洛渡、白鹤滩水电站高拱坝工程，收集并整理混凝土浇筑与温控方案及其实施效果、施工进度及其相互影响等数据信息，开展基于实时信息的高拱坝混凝土浇筑与温控方案动态反馈协同设计方法研究；在此基础上，根据数据特征建立浇筑与温控方案实时信息数据交换机制，构建关联与表达模型，实现数据的实时更新与施工状态的查询、显示和分析；进行高拱坝施工数据采集及管理方法研究，初步构建了施工实时信息管理系统模型；分析高拱坝施工的约束与边界条件、施工逻辑、方案优化规则、施工过程控制方法等，初步构建了混凝土浇筑与温控方案知识库；建立基于现场实时施工信息和知识库的数据挖掘模型；为合理有效的优选高拱坝混凝土温控方案，将模糊综合评价法与层次分析法相结合，建立高拱坝混凝土温控方案模糊层次分析模型，对备选的温控方案进行模糊综合评价，确定最优温控方案；集成施工系统多维建模和情景绘制与渲染技术，构建高拱坝浇筑及温控方案动态分析与协同设计模型；结合溪洛渡、白鹤滩等工程进行模型验证和应用。