关键词: 黏性土, 水平层分析法, 地震主动土压力, 参数分析

Abstract: Horizontal slices method is adopted to deduce active earth pressure formulas of cohesive soil under seismic condition; and analytical solutions of resultant force of active earth pressure and its application position, distribution of earth pressure and critical rupture angle are obtained. The influential factors of horizontal and vertical seismic accelerations, dip angle of wall back, cohesion and internal friction angle of filler, cohesion and external friction angle between filler and wall back and uniform distributed overloading are considered and analyzed. Results show that active earth pressure formula under seismic condition is the same as that obtained by Rankine theory, Coulomb theory or Mononobe-Okabe theory. The distribution of active earth pressure along wall back is nonlinear. Horizontal seismic acceleration increases active earth pressure while vertical seismic acceleration makes active earth pressure decrease.

Key words: cohesive soil, horizontal slices method, seismic active earth pressure, parameter analysis