关键词: 多级挡土墙, 土压力分布, 土压力系数, 土压力作用点

Abstract:

By analyzing the actual earth pressure of certain multistage gravity retaining walls, the horizontal earth pressure distributed situation can be described as “R”; the lower earth pressure is less than the bottom value, the bottom value is maximal and the middle is minimum. When the shelf-wall construction the actual earth pressure at the first and second layer is close to the resting earth pressure and more than the active earth pressure; while the third and forth layers is less than the active earth pressure; on the other hand, the pressure at all layers are less than the active earth pressure while the upper wall(s) and slope constructed. The coefficient of earth pressure changes with the filled increased, which is accordantly with the value of the earth pressure. Simultaneity, the position of the action point of the earth pressure is from 0.4H to 0.5H; and it is upper shift along with the earth fill depth; the smaller the platform width between each single wall, the bigger the upper wall influence on the subordinate wall; the higher earth pressure action point. This conclusion has good theoretical guiding sense to the multistage retaining wall designs.

Key words: multistage retaining walls, earth pressure distribution, earth pressure coefficient, the action point of earth pressure