高碾压混凝土坝施工过程仿真与进度风险研究

发布时间：2018-01-22 20:14

本文关键词： 高碾压混凝土坝施工过程仿真进度风险分析实时监控自适应建模　出处：《天津大学》2014年博士论文　论文类型：学位论文

【摘要】：作为未来高坝大库建设的代表性坝型之一，近年来碾压混凝土坝的建设规模不断提高，筑坝技术快速发展，施工设备不断革新。势必带来高强度连续施工等工程科学问题，给工程设计和施工阶段的进度分析控制带来了极大的挑战。本文围绕高碾压混凝土坝施工全过程仿真、施工进度风险分析、施工过程实时动态仿真开展了深入系统的研究，主要取得了以下创新性成果。（1）面向工程设计阶段，采用系统观点分析高碾压混凝土坝施工全过程，建立了全过程仿真数学逻辑关系模型，提出了基于施工工艺的施工过程建模与仿真针对传统的碾压混凝土坝施工过程仿真研究重视系统内各实体的状态改变和各部分的工序衔接，强调对混凝土运输子系统的模拟，没有完全准确地体现施工质量控制要求的约束作用，没有全面考虑各子系统间的相互制约关系等问题，在对施工仿真系统进行详细分析的基础上，本文建立了高碾压混凝土坝施工全过程仿真的随机动态数学逻辑关系模型，系统地阐述了动态合仓模型、运输上坝模型、仓面作业模型以及系统耦合模型的实现原理和方法。完善了面向设计阶段的高碾压混凝土坝施工全过程仿真的建模理论与方法。（2）针对工程进度的随机性和不确定性，引入了基于仿真的进度风险分析模型——CSRAM，结合高碾压混凝土坝施工进度计划的特点提出了模型的改进方法针对工程进度风险分析领域中常见的理论方法和计算模型难以考虑工程活动相关性和风险因素相关性的问题，本文引入了基于Monte Carlo仿真的进度风险分析模型——CSRAM。结合高碾压混凝土坝施工进度计划的特点，提出了考虑各活动涉及的时间和地点的改进CSRAM，实现了施工网络进度计划的不确定性评价。并研发了相应的施工进度风险分析软件系统。（3）面向工程施工阶段，提出了基于实时监控信息的高碾压混凝土坝施工自适应仿真，分析了相关建模理论与方法，实现了施工过程的实时动态仿真传统的施工仿真技术主要应用于工程的设计阶段，不能根据施工过程的动态变化进行实时仿真和进度控制。针对这一局限，本文提出了基于实时监控信息的高碾压混凝土坝施工自适应仿真。提出了利用施工信息实时监控系统获取实际施工数据，分析了实际信息数据的实时处理机制，实现了仿真边界的动态调整和仿真模型的实时更新，使仿真系统可以及时反映施工环境的动态变化，有效地提高了仿真模型的准确性。
[Abstract]:As one of the representative dam types in the future, the construction scale of roller compacted concrete dam is increasing in recent years, and the technology of dam construction is developing rapidly. Continuous innovation of construction equipment will inevitably lead to engineering scientific problems such as continuous construction with high strength. This paper focuses on the simulation of the whole construction process of the high RCC dam and the risk analysis of the construction schedule. The real-time dynamic simulation of construction process has been studied systematically, and the following innovative results have been obtained. 1) at the stage of engineering design, the whole construction process of high roller compacted concrete dam is analyzed from the view of system, and the mathematical logic relation model of the whole process simulation is established. The modeling and simulation of construction process based on construction technology are put forward. In view of the traditional simulation research on the construction process of RCC dam, emphasis is paid on the state change of each entity in the system and the connection of each part of the process, and the simulation of the concrete transportation subsystem is emphasized. On the basis of the detailed analysis of the construction simulation system, the constraints of the construction quality control requirements are not fully reflected, and the mutual restriction relations among the subsystems are not considered in an all-round way. In this paper, the stochastic dynamic mathematical logic relation model of the whole process simulation of high roller compacted concrete dam construction is established, and the dynamic closed warehouse model and the transport dam model are systematically expounded. The realization principle and method of warehouse surface operation model and system coupling model are presented, and the modeling theory and method of whole process simulation of high roller compacted concrete dam construction oriented to design stage are perfected. 2) aiming at the randomness and uncertainty of project schedule, a simulation based schedule risk analysis model, CSRAM, is introduced. Based on the characteristics of construction schedule of high RCC dam, the improved method of model is put forward. It is difficult to consider the correlation between engineering activities and risk factors in the common theoretical methods and calculation models in the field of project schedule risk analysis. This paper introduces the schedule risk analysis model based on Monte Carlo simulation, which combines the characteristics of construction schedule of high RCC dam. An improved CSRAM, which considers the time and place involved in each activity, is proposed to realize the uncertainty evaluation of construction network schedule, and a corresponding software system for risk analysis of construction schedule is developed. In this paper, the adaptive simulation of high roller compacted concrete dam construction based on real-time monitoring information is put forward. The related modeling theory and method are analyzed, and the real-time dynamic simulation of construction process is realized. The traditional construction simulation technology is mainly used in the design stage of the project, which can not be real-time simulation and schedule control according to the dynamic changes of the construction process. In this paper, an adaptive simulation of high roller compacted concrete dam construction based on real-time monitoring information is proposed, and the real-time processing mechanism of practical information data is analyzed by using the construction information real-time monitoring system to obtain actual construction data. The dynamic adjustment of the simulation boundary and the real-time updating of the simulation model are realized, so that the simulation system can reflect the dynamic change of the construction environment in time and improve the accuracy of the simulation model effectively.
【学位授予单位】：天津大学
【学位级别】：博士
【学位授予年份】：2014
【分类号】：TV642.2;TV511

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