Optimization Of Deep Foundation Pit Supporting Scheme Based On Unascertained Measure And DEA

With the rapid development of national economy, the state has increased investment in infrastructure construction, the construction of high-rise buildings and subways bring a lot of deep foundation pit, the forms of deep foundation pit may also towards diversification. The feasible support schemes are often more than one kind in deep foundation pit support engineering. The advantages and disadvantages of the deep foundation pit supporting system are related to the safety and economy of the whole foundation engineering. Deep foundation pit supporting scheme has its particularity and complexity, it has important theoretical significance and practical value to find the optimal supporting scheme in the feasible support schemes under the premise of security and stability.The traditional index system of the traditional deep foundation pit supporting scheme is generally safe, economic, environmental and time limit for a project. Through a comprehensive analysis of factors affecting the investigation of deep excavation program, the quality of the new index is introduced, the second level indicators to determine, the index system of deep foundation supporting pit schemes is established, using information entropy method to determine each index weight, use of unascertained measure theory to establish optimization model of deep foundation pit supporting scheme to determine the best plan of deep foundation pit. While the data envelopment analysis theory(DEA) and the combination of unascertained measure applied to the analysis of deep excavation program, the establishment of FCA-DEA model, the validity of the analysis of the various support programs. The example shows that the application of unascertained measure and data envelopment analysis theory in the optimization of deep foundation pit supporting scheme, can be scientific and effective to select the optimal supporting scheme, and the effectiveness analysis of other feasible supporting scheme, find the possibility of further improvement, in order to provide references for engineering design in the future.