Medium Reservoir CFRD Filling Compaction Quality Management Research

The concrete faced rockfill dam(CFRD)originated in the United States in nearly40 years,gradually developed a new class of dam structure type,having a cross-sectional structure,high safety performance,abundant raw materials,the construction is simple and convenient,and low cost,is the world's more of a choice of dam type.Application in China have become increasingly common,especially in the mountainous area rich in raw materials,its construction is better.However,late in the construction of this dam type of application,there have been some early quality disease,the study found that rockfill dam filling and roller compaction process of quality control and evaluation system is imperfect is an important reason for them,traditional quality control methods can not ensure rockfill dam filling and roller compaction construction quality and reliability.Therefore,in order to enhance the quality of management,the research of process quality control and effect evaluation method is very important.In this paper,through the analysis of concrete face rockfill dam filling and roller compaction process,found that heavy and difficult quality management as follows:?The indicator of RCC dam filling process quality control is excessive,and its importance can not be distinguished;? Construction Quality Management Information management is still static point by point comparison,without the introduction of dynamic process control concepts.Therefore,the article uses the expert investigation method and the multi-level gray comprehensive evaluation model,rolling from the dam filling process quality control to select a number of indicators and quality rockfill dam typical disease associated with the formation of a larger index(grading,compaction degree,permeability coefficient,softening coefficient),as a key indicator of rockfill dam dam filling and rolling process quality control.Then process quality control method applied to the concrete face rockfill dam filling and rolling in the construction process,the analysis found rockfill dam filling and rolling in the construction process can be summarized as small batch production process,using the basic theory of small batch process quality control,with"concrete face rockfill dam construction technical specifications","concrete faced rockfill dam design" essential requirements regarding quality control process,select a higher effectiveness "mean-standard deviation(X-S)control chart" as a rockfill dam filling reference method rolling stage of the process of quality control,according to-accuracy "mean standard deviation(X-S)control charts" using the control limits in small batch production mode is not reliable,in order to ensure effective control limits more scientific paper bayes theory proposed using control charts to further improve,the resulting control limits can be based on the size of the number of samples is corrected,thereby constructing a dual control limits " Small quantities of construction control chart",and in this way as a rockfill dam filling construction process of rolling quality control.Finally,relying on engineering example demonstrates " Small quantities of construction control chart " in rockfill dam filling and rolling in the construction process of quality management and reliability.The results show that,in rockfill dam construction process of filling and rolling Application of "Small quantities of construction control chart" for quality management to ensure construction quality,reliability,thereby reducing the probability of early quality disease appears,enhance rockfill dam Period of use.