Optimal Research For Subgrade Project Of The Third Project Of The Tongliao Power Plant

The large model firepower plant plays an important role in economy of our country because of its large investment and higher security. The firepower plant carries heaviest weight on it and its structure is complex so it need strict requirement on distortion.If we adopt reasonable subgrade project that has been optimized and proved safty, reliable, economical and reasonable, the waste on subgrad project Will be reduced .normaly, the selection of the subgrad project will be complished after original test when the structural department provides one or two subgrad project according to the stratum condition. These projects pay more attention to the safty and the optimization will be ignored so the waste is serious. Tongliao firepower plant locates in the north suburb of Tongliao city and it is a large regional firepower plant.The northeast electric power design institute accomplished the in-situ test of RC prefab pile,vibrate tube cast-in-place pile and vibroflotation gravel pile composite subgrade for the third project of Tongliao firepower plant because the stratum condition did not meet the requirement of nature subgrad. The subgrad project of large model firepower plant will be affected by many fators and these factors will act and affect each other.It will be difficult for us to value the project if it is excellent or inferior using one or several factors. In this article, we study three kinds of subgrad projects by analying data and results getting from original test and considing data from technical economy as well as land construction sufficiently. The judgment of fuzzy synthesis has been used to evaluate quality,the progress of project,protecting environment and investment of these subgrad projects including vibroflotation gravel pile,RC prefab pile,cast-in-place-pile by vibrate tube based on prophase work.The results show that the optimal project based on selecting the vibroflotation gravel pile for the third project of Tongliao firepower plant will be scientific,technical and economical.Meanwhile, the economical benefit will be gotten greatly and environment around the firepower plant will be protected very well. they have been proved right by practice.On the other hand, The judgment of fuzzy synthesis is effective and practical to evaluate the subgrad project.So the success of this project provide a good example for us and the merit is significant in similar project...