Research On The Mechanism And Control Measures Of Piping In Dikes

Piping is the most ordinary and neglected deformation in dikes. However, it is the most dangerous factor to pull down dikes. Therefore, to further study on the mechanism and the prevention and control measures will improve the decision-making on flood rescue and operation and management technology, which has important practical significance and social and economical benefits. On the basis of the results achieved by other reseachers, the mechanism of piping and the prevention and control measures are further studied in this thesis. The main work includes:Firstly, a large number of related researches on piping are collected, and based on this, the current situation at home and abroad are reviewed.Secondly, the occurrence and development of piping are analytically studied. Based on the analysis of the influences of piping on the permeability of soil and the permeable coefficient, the deformation mechanism of piping are discussed.Thirdly, based on the basic theory of piping calculation and the analytical method, the seepage analysis method and calculation procedure used in Lizheng software are clarified and its application scope is discussed.Then, the prevention and control measures on piping and its design factors are analyzed. The curing of the piping deformation in Fuanyuan in Changsha is studied, Combined with the long-term working experiences, the mistakes in curing piping deformations are summarized.Finally, Lizheng software is used to solve a certain piping deformation using finite element method. The seepage quantity and the hydraulic gradient are calculated. And according to the calculating results, the curing measures are proposed.