The Research Of Technology Of Repairing The Later Period Concrete Crack In Water Conservancy Project

Crack is one of the most familiar blemishus in water conservancy project, but, because of the character ol' cement, and influence of every kind of assistance material in etc. The crack of the big physical volume concrete has been hard to avoid of. It is a main reason to result in concrete break. The research of how to prevent, handle the concrete crack has been in progress.First, this text introduced the cause, prevention measure and handle method from the summary in large quantity practice ,and the analysis with it. In the developments process of a transportation vital point, because it always runs very smooth, when the cracks were found, nobody knew why it happened. Under the unknown causal circumstance, the experiment was in progress. After many fail, finally the cracks were handled successfully. However, the cause of crack did not find out clear. Only find out the reason, the prevention and handling can be effectively. The research of the reason and handle proceeding of the crack is introduced in this text. in reason analyzing, the waves decomposition analysis method is used, establish a mathematics model with input term, system, output result . The input is had an elaborate division .The result of its output exportation is compared to the object result. Then the real creation reason is got. The analysis from the angle of the tiny view is combined to proceed. The reason from the inside, outside is analyzed. The binding force between the new and old concrete , high water-cement ratio, using too much powder ash from stove with high impurity common produced the crack. To this kind of crack, the most effectively handle method is chemistry grouting. Chemistry grouting is viable to this kind of crack from the practice. The research of this text can be used for reference in building big physical volume work concrete of water conservancy project, especially to handle the crack in water conservancy projects.