Theory And Application Of Real-Time Control For High RCC Dam Construction Schedule

With the continuous improvement of dam construction technology,the construction scale and quantity of RCC dams have been increasing in recent years.The high construction intensity,short construction period and high technical requirements of RCC dam bring great challenges to the construction process control.The application of information technology and simulation technology in RCC dam construction management provides a powerful technical support for RCC dam construction management.However,there are still some key problems in the construction management of high RCC dam.The construction simulation method can’t make full use of the existing construction information,which results in the disconnection between the simulation results and the actual construction schedule.Construction schedule control theory can’t fully analyze and control the construction status.The optimization of construction scheme doesn’t take into account the difference of expert knowledge and the fuzziness of evaluation criteria.It is a great challenge for the current construction progress control of high RCC dam to solve the problems mentioned above.This dissertation makes an in-depth analysis and research on the above problems,and achieves the following innovative results:(1)In view of the current situation that the real-time control of the construction progress of the high-RCC dam’s construction progress forecast is lack of accuracy and the construction plan decision-making is lack of real-time status,the real-time control theory of the whole process of construction of high roller compacted concrete dam is put forward,and realize the accurate prediction of construction progress of concrete dam and real-time decision of construction scheme.The existing real-time control theory of the high-RCC dam construction progress is short of accuracy of the construction schedule prediction and the real-time decision of the construction plan.In view of this problem,this paper puts forward the real-time control theory of the whole process of the construction of the high RCC dam,the beforehand control and intermediate control of the construction progress is based on the construction adaptive simulation method,the real-time warning method of the construction schedule and the real-time optimization method of the construction scheme,Firstly,the advantages and disadvantages of the existing construction schedule control method and the different construction schedule control methods are briefly introduced.Secondly,the general system of high RCC dam project is decomposed from high order,complex large system to low order simple subsystem.The theory and method of coordinated control of construction schedule are put forward according to the decomposition results.In addition,the principle,goal and method of real-time control of construction progress are produced,and the real-time control theory system of high-RCC dam construction progress is established.Finally,according to the construction schedule control principle,goal and method,the mathematical model of the whole process of the construction progress of the high RCC dam is established,and the objective function,the state transition equation,the schedule control method set and the progress control constraint condition set of the construction schedule control are defined.(2)In view of the problem that the construction parameter update in the simulation process of RCC dam simulation failed to take into account the uncertainty of the simulation parameters and the lack of consideration of the logic update of the construction simulation model,this paper put forward the method of coupling construction simulation parameters gray Bayesian update and coupling Adaptive simulation method for construction progress of high-RCC dam with dynamic updating of material supply.Currently,the construction progress of the high RCC dam is forecasted by the construction adaptive simulation method,but the influence of the uncertainty of the construction simulation parameter can’t be considered in the construction adaptive simulation method.Based on the uncertainty of construction simulation parameters,this paper combines the gray system theory with Bayesian update technology,and puts forward the gray Bayesian update technology to realize the update of construction simulation parameters.Through the above improvement,an improved adaptive simulation method of high roller compacted concrete dam is proposed.Firstly,the construction process of high roller compacted concrete dam is systematically analyzed,the mathematical model and simulation framework of self-adaptive simulation of high roller compacted concrete dam are established,and the adaptive simulation analysis and modeling of high roller concrete dam construction are realized.Secondly,the principle and method of real-time acquisition and processing of construction data in different construction processes are introduced,including the real-time collection method of data such as upper dam transportation,filling rolling,construction quality inspection and small climate in dam area.Through the construction data of different construction process Acquisition and storage,providing the construction of adaptive simulation a solid data support;Finally,a real-time updating method of construction simulation initial conditions and construction simulation parameters is proposed,which realizes the updating of the adaptive simulation model of high roller compacted concrete dam construction.According to the above methods and theories,the self-adaptive simulation of high-RCC dam construction is realized,which provides decision support for real-time control of high RCC dam construction progress.(3)In view of the problem that Construction progress delay has an influence on the construction progress delay on the next stage of construction early warning result,and differences in the level of expert knowledge and the ambiguity of evaluation criteria have an impact on the optimization of the program during the Construction control process of high roller compacted concrete dam.The construction schedule early warning model considering the construction progress delay and the optimization method of the construction scheme based on the entropy weight-D number model are put forward to realize the early warning and construction plan optimization of the high RCC dam.In view of the problem that Construction progress delay has an influence on the construction progress delay on the next stage of construction early warning result during the construction progress of the high-RCC dam,the real-time early warning model of high-RCC dam construction is established by combining the construction time of the key nodes in different construction stages and different dam sections,and the real-time early warning method of high-RCC dam construction progress is put forward.Through the actual progress and schedule progress deviation analysis,to lead the current construction phase of the different dam construction progress warning.Through the analysis of the progress of the next stage of the simulation construction schedule and the planned progress,to provide early warning of the early stage of different construction dams and decision support for the program optimization.In view of the multi-objective decision-making process of the construction scheme of the high-RCC dam,the difference of the expert knowledge level and the ambiguity of the evaluation criterion can’t be considered to the effect of the evaluation result,Firstly,the evaluation results of different construction schemes were obtained from the simulation results.The correlation between the evaluation indexes was analyzed by Pearson correlation test.And then use the entropy weight method to determine the weight of each index,the application of D number theory to get different construction programs in different identification framework under the index evaluation D number,Finally,according to the trust degree of different experts and the relationship between the weights and sizes of different indicators,the fusion rules of D comprehensive evaluation of construction plan are determined,the recursive fusion of the optimal index of the scheme is realized,and the fusion results are integrated to obtain the comprehensive evaluation index of the construction plan To optimize the best construction program.(4)A real-time control application of high-RCC dam construction based on adaptive simulation is realized by combining a project.According to the real-time control theory of the whole process of high RCC dam construction,the real-time control of the construction of high-RCC dam based on adaptive simulation method,real-time warning method of construction schedule and real-time optimization method of construction scheme is realized in combination with a project.Firstly,the real-time acquisition of high-RCC dam construction data is realized by using GPS technology,sensor technology,PDA information acquisition technology,database technology and Internet technology to provide data support for real-time control of construction progress.Secondly,taking LDL project as a case study,this paper elaborates the realization process of real-time early warning method and realtime optimization method for construction of high-RCC dam construction,and compares this research method with other methods,the accuracy and real-time performance of the method are proved;Finally,according to the optimization of the construction plan of the construction plan of the concrete production,the concrete transportation and the warehouse construction of the high RCC is obtained by using the construction schedule coordination control method for the purpose of supporting the decision-making and taking real-time control of the construction progress.