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    高印立
    （中國建筑科學(xué)研究院地基所  北京 100013）

[提要]  常規(guī)土壓力計算均建立在半無限土體假定的基礎(chǔ)之上，而對于有限土體一般仍沿用常規(guī)的朗肯、庫侖土壓力理論，這與實(shí)際情況有一定的差異?；谕恋乃苄陨舷蘩碚摚o出一種有限土體土壓力的計算公式，并與朗肯土壓力計算結(jié)果進(jìn)行了對比分析。
[關(guān)鍵詞]  基坑開挖  有限土壓力  朗肯土壓力  土的塑性上限理論

The calculation of normal earth pressure is based on the semi-infinite assumption. But Rankine's and Coulomb's theories are still followed for the calculation of finite earth pressure, which is different from the practice. An earth pressure calculating formula is presented based on the soil plasticity upper-bound theory. And the calculated results are analyzed comparing with those of Rankine's earth pressure.
Keywords:  foundation excavation; finite earth pressure; Rankine's earth pressure; soil plasticity upper-bound theory