| The comprehensive control of the storehouses construction of concrete dam is always the key point in the construction of hydraulic engineering.Under the background of hydraulic informatization,the intelligent construction of dam is conceived and developed gradually.The massive construction data accumulated by thousands of pouring units provide more ideas for the concrete construction of dam storehouses.And it is the foundation of dam construction organization and management to understand and apply the construction data in a sufficient and reasonable way.This paper takes the construction of storehouse concrete pouring of Baihetan project as the research background,analyzes the guiding significance of data mining of construction information during the construction period of the dam,carries out in-depth mining of the construction data information of storehouse concrete pouring of Baihetan dam,adopts corresponding mining methods for different mining purposes,and obtains the knowledge and information hidden by construction data.Meanwhile,the construction progress and temperature control effect of several typical dam pouring units are demonstrated in an intuitive way.The main research contents of this paper are as follows:1)The construction information data mining theory of period of concrete dam construction has been established.The significance of data mining to the construction data information utilization and engineering guidance of concrete dam is analyzed in a multiangle and multi-fineness way.2)According to the massive concrete construction data of Baihetan dam during the construction period,combined with the construction information data mining theory,the corresponding data mining method was selected to obtain the data mining results to guide the actual construction according to different objectives.First of all,from the perspective of temperature control of concrete in pouring units,based on the distributed temperature sensor and Apriori algorithm,the association rule of maximum temperature and pouring temperature of concrete in pouring units considering seasonal factors is deeply mined.The results show that there is a strong correlation rule between the maximum temperature and the placing temperature in both high temperature season and low temperature season.When the pouring temperature of concrete in the high temperature season is within the range of 11℃～13℃,the possibility of the highest temperature of the pouring units in 25℃～28℃ is 64.3%.When the placement temperature of concrete in the low temperature construction season is within the scope of 12℃～14℃,the possibility of the highest temperature of the pouring units in 24℃～27℃ is 78.33%.Both are strong association rules.Therefore,the placement temperature should be strictly controlled during the pouring process.Secondly,from the perspective of controlling the construction progress of pouring,the distribution rule of the interval time between adjacent billet layers cover of pouring units in Baihetan project is explored deeply.The statistical analysis method is used to compare and analyze the pouring units with six billet layers and seven billet layers with a thickness of three meters.The results show that when the unit is seven billet layers,the interval time control is generally better than that of the six billet layers’,which can better control the interval time between adjacent billet layers,and is beneficial to concrete pouring and performance control.The interval time between the first and second billet layer in the pouring units is the longest among all the pouring billet layers,2.23 h and 2.33 h respectively.In the construction process,the difference of the interval time between the first and second billet layers should be paid attention to and the control scheme should be put forward.3)From the angle of coordinating the construction progress and temperature control of concrete pouring,a comprehensive evaluation model of pouring units progress and temperature control is established to evaluate the comprehensive construction control of dam concrete pouring in the form of intuitive and quantification.Using TOPSIS and rank-sum ratio and FUZZY SET theory,the weights of C: RSR are selected as 0.1:0.9,0.5:0.5 and 0.9:0.1 respectively,based on the actual construction data of 10 continuous 3-meter thick pouring units(11#-011～11#-014～11#-016～11#-021)in Baihetan dam section 11#,the pouring units are objectively comprehensively evaluated and sorted.The results show that: The positions of 11#-019 and 11#-021 are the best under the three weights,while the positions of 11#-011 are the lowest.It indicates that the overall effect of the subsequent pouring unit is obviously better than that of the previous,and the overall construction progress and temperature control of the project are in good condition.The comprehensive evaluation of pouring units directly shows the coordination between the construction progress and temperature control of the concrete pouring,which is beneficial to the engineering decision-makers to make the overall control. |
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