Because the add-on stress of soft soil is little than the carrying, the stability coefficient is little than 1.25, the settlement is more than 30cm, so the soft foundation must has been treated.

• 因计算出地基附加应力小于软土层的容许承载力，稳定系数小于1.；25，沉降量大于30cm，所以该区软基必须进行处理。