介绍了郎肯土压力理论和延伸的郎肯土压力理论两种土压力计算方法,在实测数据的基础上,通过具体实例计算,对比分析了两种计算方法的差异,结果表明,工程上常用的郎肯土压力理论虽具有计算简便、参数容易获得等优点,但无法对土体基质吸力状态的变化进行考虑,采取延伸的郎肯土压力理论对其计算值进行对比、校核,对于深入理解、合理选用常用计算方法得出的土压力值具有有益的参考。%This paper introduces two kinds of earth pressure calculation methods of Rankine earth pressure theory and extended Rankine earth pressure theory.Based on actual-surveying data,through specific calculation case,it comparatively analyzes the differences of two kinds of calculation methods.Results show that： Rankine earth pressure theory used in the engineering has advantages of simple calculation and easy parameter acquisition,but has no way to consider the change of soil absorbing condition,and determines to use extended Rankine earth pressure theory for calculation value comparison and checking,which has certain reference for rationally selecting common calculation method to obtain earth pressure value.
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