基坑支护结构上水土压力的分算与合算

Estimating the water and earth pressures on the supporting structure around a foundation pit separately and together

基坑支护结构上实测的内力常常远比用经典土力学理论计算的数值小。本文分析了造成这种情况的一些可能的原因 ,在计算方法和水土相互作用机理方面对于水土“分算”和“合算”这一有争论的问题进行了分析和讨论 ,提出了在一定条件下“水土合算”可能有一定微观基础 ,指出这是一个有待于深入研究和探讨的课题。

In this paper the reason why measured stress on supporting structure is generally much less than that calculated with classic earth pressure theories is explored. The method of estimating water and earth pressures on supporting structure separately and together which has become an attention and discussion focus in field of geotechnical engineering is analyzed. It is indicted that the method of estimating water and earth pressures together is inconsistent with the effective stress principal, but there might be some microscopical ground. Therefore it is an important problem deserving of further research.