软土地基承载力确定

Determination of Bearing Capacity of Soft Soil Foundation

螺旋板载荷试验是适用于地下水位以下的确定地基承载力的一种原位测试。通过工程实例分析螺旋板载荷试验P-S曲线变形控制标准并确定其值;利用控制标准分析工程算例,同时采用软土理论公式进行比较,得出载荷试验法能较准确反映地基的实际承受能力;并应用有限元模拟载荷试验P-S图,在应用时结合土体实际受力情况。

The load test of screw plate type is a testing for determing the bearing capacity of foundation under groundwater level. By engineering example, the paper analyzes the standards for control of p - S curve deformation in load test of screw plate type and determines its value. By means of controlling standards, the engineering algorithm is analyzed, at the same time compared with theoretical formula for soft soil. Thus it is reached that load testing method is capable of exactly reflecting the actual bearing capacity of foundation. And the finite element method is applied to simulate p - S chart of load testing in the light of practical bearing conditions of soil.