Optimization Research On Collapsible Loess Foundation Treatment Scheme

Collapsible loess is a sort of specific soil,especialy undertaking the construction in loess areas .It is necessary to take certain measures to deal with the foundation of the building in order to improve the physical and mechanical properties of the soil ,And also to reduce or eliminate the collapsibility of loess foundation to ensure the safety of the building.Currently,the research of collapsible loess foundation treatment is generaly obtained by mechanical calculations or through the experiment. It is not likely to select the treatment based on each influencial factors and comparment. For a specific project, there may be several kinds of treatment for collapsible loess foundation treatment.However,the selection of the treatment is usually affected by the subjective experience of the designer .And it is always hard to achieve "optimal" .Therefore, a method of collapsible loess foundation treatment is created through the comparment of those means based on the previous research.Specific steps:(1) The advantages and disadvantages, scope, uncertainty of the method of each collapsible loess foundation treatment method are analyzed in details.(2) Use value engineering, through calculation, concluded that the optimal value of the coefficient of foundation treatment plan, and given the specific operation method of the optimal plan.(3) In calculating function evaluation coefficient by ahp, foundation treatment scheme, and draw the function system diagram, and through expert investigation questionnaire to the collapsible loess foundation treatment scheme function system graph of the weight of each function reference is given.(4) For a specific engineering project, the treatment of collapsible loess foundation is optimized and the feasibility is verified through AHP model ,evaluation index system and the combination of the AHP and value engineering.