Real-time Control For Construction Schedule And Quality In Hydroelectric Project

Construction of hydroelectric project, with the distinct characteristic of complex condition, large engineering quantity, long construction circle and high construction intensity, is influenced by many factors, such as machinery allocation, construction technology and construction diversion, so that construction management and real-time control for hydroelectric engineering is quite difficult. On the basis of research on the key technical problems of construction real-time control for schedule and quality in hydroelectric project, the paper presents systematic theory and methodology of real-time control for schedule and quality in hydroelectric project. Real-time control of schedule and quality for concrete dam and large scale underground caverns construction operations are presented, through instroducing real-time control theory into construction management of large hydraulic building. The main contents and achievements are as follows:1. Through applying the control and large scale system basic theory in the construction management of hydroelectric engineering, the key technical problems and main control links of real time control for schedule and quality in hydroelectric project are analysed. With numerous complex constrains, the real-time control systematic theory and methodology of construction schedule and quality in large hydroelectric project is presented, which reveals the mechanism and inherence law for construction real time control of hydroelectric project. This theory system is composed of construction condition control, construction technics control and construction aim control, which provide theory foundation for the application of real-time control theory on the the large hydraulic structure.2. Aiming at the characteristic of construction process and the main object of quality control for concrete dam construction, the principle and measure of construction schedule and quality real-time control for concrete dam construction is presented. On the basis of analyzing the influence action mechanism in the construction system of concrete dam, the stochastic dynamic mathematical logic model for concrete dam construction schedule and quality control is presented, which comprehensively consider many constrain conditions, such as temperature control and pouring ability. The practical construction control procedure of concrete dam construction schedule and quality is brought out based on theory of cybernetics. The scheduling and quality monitoring model is proposed. Through the application of real-time control in project example, the application feasibility of real time control measure for schedule and quality of concrete dam construction is verified.3. The excavation process of large scale underground caverns is also a construction mechanical process. Any construction behavior may lead to the change of stress state in natural ground. Aiming at the characteristic of construction mechanics, the real-time control model of construction schedule and quality for underground caverns, considering construction procedure, geological conditions and safety support, is presentd, which provides theory foundation for the application of real-time control in large underground caverns. The paper analyzes the coordination relationship between construction schedule and mechanics problems, mainly studies excavation sequence optimization of underground powerhouse and support opportunity problems, and brings forward real-time method for underground caverns, considering construction schedule, mechanical equipment coordination, excavation procedure and supporting effect. The practical control procedure of construction schedule and quality is advanced based on the construction characteristic of large scale underground caverns. Good effect is obtaind through the application of the real-time control method for construction schedule and quality in large real underground powerhouse cavern group.