Analysis And Application Of Monitoring Technology Of Deep Foundation In Jiaodong

With the rapid development of the national economy,the space of central city has become more and more limited because of the expansion of urbanization.To ease the problem of urban land,the application of three-dimensional urban space has become inevitable.With downward extension of high-rise,super high-rise buildings and underground railway,stations,parking lot and other projects,the construction technology of deep foundation has been advanced.Informative constructionrequires not only construction monitoring during the construction of deep foundation but also prediction of the foundation deformation based on monitoring data.With the case of Yongwangmengle City’s foundation construction in Yantai,analysis is produced according to horizontal displacement of pile foundation and settlement monitoring data.Combined with the monitoring data,the model of Systematic Grey Prediction is thoroughly studied and the main contents are:(1)In combination with the current status of monitoring technology of deep foundation engineering,the necessity of deformation monitoring、construction of deformation monitoring system and practical engineering significance of prediction model are elaborated.(2)The design principle of deformation monitoring system of foundation is analyzed and through theoretical research and engineering practice of deep foundation,the purpose of safety monitoring,monitoring period,early warning value and five aspects of the analysis and evaluation of monitoring results are summarized.(3)The principle of Systematic Grey Predictionmodel,a new information GM(1,1)model and metabolic GM(1,1)model,conditions for the application of short term and long term and the method of model accuracy test are researched.(4)The Yantai Yongwangmengle City deformation monitoring scheme of deep foundation which includes monitoring content and quantity,reference points and layout of monitoring points is elaborated and the monitoring results of horizontal displacement and settlement of pile top are analyzed in detail.(5)According to the above research results,the model is achieved by MATLAB 7.0which is applicated in monitoring of horizontal displacement and settlementof foundation and its practicability and reliability are proved by comparing with the measured results.