深基坑工程中考虑开挖深度和时间效应的土压力计算公式的探讨

Study on Time-space Effect on Earth Pressure inDeep Foundation Pits

根据土体特性及深基坑工程的实际特点 ,在分析了经典土压力理论和近年来新出现的土压力计算模型的基础上 ,运用曲线拟合的方法并结合考虑土体蠕变特点 ,初步探讨了考虑开挖深度和时间效应的土压力计算公式的建立 .研究表明 ,该公式对实际工程中的数据是一种实用有效的分析方法 .为土压力的计算分析提出了一种新思路 ,是对经典土压力计算公式的有益补充 .

According to the characteristics of deep foundation pits excavation,the earth pressure calculation formula considering effects of both depth and time has been put forward to meet the requisitions of the deep foundation excavation.Next,based on the Rankine theory,the earth pressure calculation program and the Rankine theory calculation have been modified.Some good results are achieved.Finally,one historic case is studied with the new method of earth pressure calculation.