中文摘要：

结合上海某植物园堆山工程，通过直剪试验及三轴剪切试验，得到考虑软土结构性的折线型强度公式和不考虑软土结构性的直线型强度公式的参数，采用这两种方法对山体荷载作用下不同位置处的软土地基的强度增长进行了预测，并与现场十字板剪切试验结果进行了对比。结果表明：由于该工程的软土地基具有明显的结构性，采用直线型强度公式得到的地基强度增长量要大于采用采用折线型的增长量；另外，在应用考虑土的结构性的折线型强度公式时，应该尽量采用三轴试验参数而不是直剪试验的参数，这样得到的结果更接近十字板试验结果。

英文摘要：

Strength increment of soft soil of a real project in Shanghai is studied. Strength parameters of polygonal line equation which considering the effect of soil structure and linear equation which didn＇t consider soil structure are obtained by direct shear test and triaxial test. Shear strength increment is calculated with these parameters by the two methods, and compared with the field results obtained by vane shear test. Because of soil structure, strength increment calculated by linear equation is greater than that by the polygonal line equation. When using polygonal line equation to predict soil strength, the result is more close to result of vane shear test. And it is suggested that the strength parameters should be obtained by triaxial test.