Deep Foundation Engineering Support Program Reliability Analysis And Optimization

It is a system engineering to design and construct the deep foundation ditch, the deterministic parsing cannot assure in accordance with reality because of soil's complexity and some uncertain element. So it is an important task to optimize the best design in some drafted projects that are according to engineering.The author analyses the supporting principle, supporting type and applicable condition of deep foundation ditch, and studies the reliability of supporting project, on the basic of the reliability theory and using the theory of probability limit status design. The paper conclude these contents: Basic method of reliability analysis; The concept and meaning of deep foundation ditch supporting reliability and establishing method of reliability model; And the limit status equation and reliability model's establishment of supporting construction. Thereby, there is a reliability model method that can analyze quantitatively using reliability method.The author utilizes fuzzy synthesis assessment theory for decreasing the fuzziness and complexity of problem, so the settlement of problem can reach balance between accuracy and simplicity. Another, the author studies the multiple attributions and the best decision of foundation ditch supporting project, and studies the fuzzy synthesis assessment method, then applies them to the engineering, so selects the best project through the reliability analysis and optimization assessment toward different project.So the method has practical value about the design and optimization of deep foundation supporting project through the engineering application.