The invention discloses a
pile brace supporting structure
screening method based on the sacrifice
yield rate. The
pile brace supporting structure
screening method comprises the following steps that 1,a feasible region of a foundation pit
pile brace supporting structure is established; 2, a
noise factor set is established; 3, FLAC<3D>
software is utilized to simulate the foundation pit excavationprocess, and a
system response result is obtained; 4, robustness measurement indexes of the foundation pit pile brace supporting structure are calculated; 5, the cost of the foundation pit pile bracesupporting structure is calculated; 6, a Pareto
leading edge is drawn according to the cost and the robustness measurement indexes; and 7, a knee point of the Pareto
leading edge is obtained by applying the sacrifice
yield rate, that is, the optimal foundation pit pile brace supporting structure designing scheme is obtained. By screening points of the Pareto
leading edge, the influences of the similar points on knee point selection are weakened, the knee point is multiply screened to avoid
trapping in the dilemma of
local optimum, dependence on shape and
curve fitting of the Pareto leading edge is small during knee point screening is small, and the
screening result is accurate and reliable.