Structure Optimal Design In Soil Nailing Based On Variational Principle

This article in variational principle's foundation, an energy equation is established basing on the mechanical characteristics of the surface layer. According to principle of the minimum potential energy, a closed-form solution on the horizontal displacement of the soil-nail braced structure is derived. The result of the present paper is tested through a comparison with a project case. The result shows that the calculation method is feasible. Form the result, some support parameters were analyzed and concluded that: With the increased thickness of the structure of soil nailing decreaseing horizontal displacement; With the increasing inclination of soil nail retaining structure level displacement has also increased; the greater the diameter of soil nailing, retaining structure greater horizontal displacement; for complex formation, using the respective results of the physical indicators, and the use of soil physical indicators of the weighted average of the results of the calculation there is a difference between Therefore, as far as possible in the calculation should be based on values of the actual situation.