Limit analysis method for seismic active pressure on sheets between anti-slide piles
WANG Ming-min1, WANG Gui-lin1, 2, WU Shu-guang1, 2
1. School of Civil Engineering, Chongqing University, Chongqing 400045, China; 2. Key Laboratory of New Technology for Construction of Cities in Mountain Area (Chongqing University), Ministry of Education, Chongqing 400045, China
Abstract：Calculating the seismic active pressure on sheets between anti-slide piles or stabilizing piles remains a longstanding challenge for engineers and technicians. According to the characteristics of soil sliding surface between piles based on the generalization of a series of experiments, a three-dimensional sliding wedge model for the instability of local soil is established. By calculating the internal energy dissipation rate and the external load power of the three-dimensional instability mechanism, an analytical procedure for seismic active pressure calculation is proposed based on the limit analysis theorem. By comparing the seismic active pressure acting on sheets between piles with that on rigid retaining wall, it is found that the earth pressure on sheets by using the three-dimensional sliding wedge model is less than that on retaining wall by using the plane strain model. The analysis of multiple combinations of horizontal and vertical earthquake accelerations, indicates that both the horizontal seismic acceleration and the vertical earthquake acceleration have significant effect on the active earth pressure of sheets between anti-slide piles, and that the active earth pressure considering bi-directional seismic action is greater than that considering horizontal earthquake effect or vertical earthquake effect separately.
王明珉, 王桂林, 吴曙光. 地震作用下桩间挡土构件主动土压力极限分析方法[J]. 岩土工程学报, 2015, 37(12): 2301-2307.
WANG Ming-min, WANG Gui-lin, WU Shu-guang. Limit analysis method for seismic active pressure on sheets between anti-slide piles. Chinese J. Geot. Eng., 2015, 37(12): 2301-2307.
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