考虑变位影响的刚性挡墙非极限土压力研究

doi:10.13722/j.cnki.jrme.2013.1842

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Abstract The classic theory of earth pressure can only be used to calculate the limit earth pressure on the retaining wall under the mode of translation. With the Mohr circle expressed with the principal stress difference and on the basis of the radial stress-strain relation obtained from the stress path triaxial tests，the nonlinear relationships of the mobilized internal friction angle of the soil and the friction angle between the wall and the backfill soils vesus the displacement were established under non-limit state. The method of effective area ratio of wall displacement was put forward to quantify the relationship to rigid retaining wall under the deformation mode of rotation. Based on the method above and combined with the method of horizontal slices and the modified Coulumb?s formula，the formula of earth pressure distribution，the resultant force and its application point under non-limit state which considered the influence of wall deformation were deduced. The result of an example showed that the difference between the theoretical calculation value quantified by the method of effective area ratio of displacement and the measured value was small. The proposed formula well reflects the change of earth pressure with the wall displacement and is an effective extension of Coulumb?s theoretical formula.

Key words： soil mechanics retaining wall earth pressure friction angle non-limit state displacement horizontal slices analysis method

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2013.1842 OR https://rockmech.whrsm.ac.cn/EN/Y2015/V34/I5/1060

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