Discussion on Calculation Method of Steel Support Prestressing Force in Foundation Pit Project
According to engineering experience,the steel support prestressing force is 0.5～0.8 times of the standard value of axial pressure.However,the support axial pressure standard value is unknown,and general calculation of the prestressing force is determined by using iterative method.But the calculation process is complex,and there are two brace axial pressure standard values.So there is a big controversy about the standards of the prestressing force in the construction process.Therefore,through theoretical analysis,the axial force in prestress can equivalent to the axial force of a stiffness increases but without prestressing force,it can be calculated directly to support axial pressure standard value and the steel support prestressing force.Finally,through a project example,compared with the iterative method,it is considered that the prestressing force calculation method modified is simple and convenient,and the results are reliable.
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