基于灰色理论的真空堆载预压分层沉降预测

对真空堆载预压加固处理的软土地基，用灰色理论模型预测地基的分层沉降，结果表明：对于土层分布均匀的地基，verhulst模型能较准确地预测分层沉降，误差在10％以内。对于土层分布不均匀的地基，verhulst模型预测误差较大，进行残差修正，修正的verhulst模型能较准确地预测分层沉降。用不同点数预测地基的分层沉降，同实测沉降数据对比发现、对于土层均匀或不均匀的软土地基，在已知真空影响范围外土层的沉降时，灰色模型就能较准确地预测分层沉降。

Study on Layered Settlement Prediction of Soft Soil Foundation Which Reinforced by Vacuum Preloading Based on Gray System

Gray Theory is used to predict layered settlement of soft soil foundation, which reinforced by vacuum-surcharge preloading. The result shows that： Verhulst model can accurately predict layered settlement of well-distributed soil, with error of less than ten precent, but for uneven soil of foundation, the error of Verhulst model compared greatly , so the Verhulst model was modified,modified Verhulst model can accurately predict layered settlement of uneven soil of foundation. Then predict the layered settlement of foundation by different points of real datas,compared with the measured datas found that , when the settlement which out of the vacuum affected is known, Gray Model can accurately forecast the layered settlement of ground.