长江科学院院报2017，Vol.34Issue(12)：89-93,5.DOI:10.11988/ckyyb.20160872
非极限状态下有限土体土压力计算方法探究
A Computation Method for Earth Pressure of Limited Soils under Non-limit State
赵轩 1马淑芝 1唐为民 1丰丛杰1
作者信息
- 1. 中国地质大学(武汉)工程学院,武汉430074
- 折叠
摘要
Abstract
Due to strict control for the displacement of retaining structure in excavation engineering,the theory of soil pressure in non-limit state should be considered in the calculation of soil pressure of limited soils.However,most previous studies were confined to the earth pressure of sandy limited soil under non-limit state,and the calculation methods are based on traditional Rankine's earth pressure theory which is not applicable in semi-infinite boundary condition.In view of this,for cohesive limited soils which do not meet the semi-infinite boundary conditions,we divided the trapezoidal sliding wedge soil into blocks,and established the differential equation of earth pressure strength of cohesive limited soil at non-limit state according to the curves of mobilized angles of internal friction and external friction and mobilized cohesion vs.displacement angle,respectively.Furthermore,we derived the calculating formula for earth pressure of cohesive limited soils at non-limit state.Calculated values are larger than measured values in the range from soil surface to a certain depth of the pit;while beyond that depth,the calculated values conformed well with measured values but differed greatly from Rankine's value.In general,the calculation method presented in this paper is reasonable and feasible.关键词
有限土体/非极限状态/内摩擦角/黏聚力/土压力Key words
limited soils/non-limit state/internal friction angle/cohesion/earth pressure分类
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赵轩,马淑芝,唐为民,丰丛杰..非极限状态下有限土体土压力计算方法探究[J].长江科学院院报,2017,34(12):89-93,5.
