The invention provides a multi-factor
coupling gravity
retaining wall reliability evaluation and optimization method, and belongs to the technical field of
geotechnical engineering. The method comprises the following steps: constructing a
physical model containing parameters such as
self weight,
friction coefficient, height, filling weight and compaction degree; establishing a multi-factor
dynamic coupling model which comprises a
water level time-varying model, an earthquake coefficient
probability model and a compactness degradation model; constructing a
limit state function integrating the soil pressure, the
water pressure and the seismic
inertia force; calculating a time-varying
failure probability through random numerical
simulation; the importance degree of each factor is quantitatively evaluated by adopting standardized indexes; optimization measures such as compaction degree improvement,
water level fluctuation reduction and
dead weight increase are put forward, and the effect is verified. According to the method, the problems of single-
factor analysis, static modeling, importance evaluation and the like of a traditional method are solved,
dynamic coupling analysis of three factors of earthquake,
water level fluctuation and compactness degradation is achieved, and a scientific basis is provided for design and maintenance of the gravity
retaining wall.