Optimum Design And Research Of Supporting Scheme For Deep Foundation Pit

With the emergence of a large number of buildings in the city center,there are more and more deep foundation pit projects.As the foundation of engineering construction,support engineering of deep foundation pit has received extensive attention and application in the face of dense buildings and complex underground facilities around the construction site.In the design of foundation pit supporting project,the need to consider many factors,such as geological and hydrological conditions of the construction site,geotechnical structures,etc.,at the same time,with the improvement of construction industry environmental requirements,performance is more and more attention to environmental protection,and foundation pit supporting construction efficiency,material loss,economy analysis consider together,such as maximum optimization to improve the support scheme,implementation of the foundation pit supporting science,economy,efficiency and environmental protection.Faced with the problem of how to choose the optimal support scheme with scientific methods,different scholars have successively adopted systematic research methods such as component analysis,regression method and hierarchical method,mainly in quantitative ways.However,in practical engineering projects,decision-makers generally do not grasp the large sample information required by the above methods.Considering that the information of many factors in the foundation pit support scheme is not completely clear and belongs to the gray system,quantitative analysis of the correlation degree between the two factors in the system can be realized by using the gray evaluation model.Therefore this paper around the foundation pit supporting design problem is discussed,the influence of the foundation pit supporting construction technology,construction period,construction cost,the requirements of environmental protection and so on various aspects factor into the same evaluation model,thus forming a multilevel grey evaluation model,through analysis,calculation and optimization of the model,to determine the ultimate foundation pit supporting methods and materials.This paper selects a practical case of a deep foundation pit supporting project of a building in xi 'an as the research object.After the preliminary analysis of the characteristics of the three supporting schemes,it USES the multi-level grey evaluation model to calculate the comprehensive score of the three supporting schemes,and selects the best supporting scheme of the deep foundation pit project.It also verifies the simplicity and operability of the method,providing a practical selection method for similar projects in the future.