水位上升下重力式浸水挡土墙的力学行为分析OA

To analyze the mechanical characteristics of gravity-type submerged retaining walls under conditions of rising water levels,based on saturated-unsaturated seepage theory and fluid-solid coupling principle,the gen-eral finite element software ABAQUS was used to simulate the displacement field of the gravity-type retaining wall and the stress field of the slope behind the wall under different rates of reservoir water level rise,compa-ring the mechanical characteristics of sandy soil and cohesive soil slopes behind the retaining wall.The results show that during the rise of the reservoir water level,the horizontal stress of the soil near the back of the wall tends to decrease,while the horizontal stress of the soil at the base of the wall tends to increase;the vertical stress of the slope gradually decreases,but the shear stress increases significantly with the rate of water level rise.During the water level rise,the horizontal displacement of the retaining wall initially moves toward the back of the wall,and gradually recovers once the water level stabilizes.For sandy soil slopes,the vertical dis-placement of the retaining wall gradually develops upward over time;for cohesive soil slopes,settlement occurs at the early stage of water level rise,followed by gradual recovery,eventually showing an upward movement trend.Under the effect of rising water level,the distribution of earth pressure behind the submerged retaining wall exhibits a pattern of first decreasing,then increasing,and finally decreasing from top to bottom.For sandy soil slopes,it is recommended to strengthen the design of drainage facilities for the retaining wall to reduce ver-tical displacement;for cohesive soil slopes,it is advised to enhance monitoring of the initial settlement of the retaining wall.