基于灰色理论的桩-筏复合地基沉降预测

Settlement Prediction of Pile-Raft Composite Foundation Based on Grey System Theory

路基的沉降过程非常复杂,常规的一维固结理论不可能考虑到影响和制约路基沉降的所有因素,因此计算得到的路基沉降值往往与实测值有很大差距,而高速铁路对路基沉降的控制要求极其严格。基于京沪高铁济南西客站桩-筏复合地基的实测沉降值,运用灰色系统理论分析桩-筏复合地基的沉降变化过程,寻求一种适合大面积堆载情况下桩-筏复合地基沉降的分析方法,为我国高速铁路车站站场基础的建设提供科学的依据。

Subgrade settlement is a complex process,and the factors that effect and restrict subgrade settlement couldn't be considered completely by general one-dimension consolidation theory,so the calculated value and the measured value of subgrade settlement often have great difference.However,to the subgrade settlement,there are extremely strict controlling requirements in relevant high-speed railway codes.In this article,based on the settlement values measured at the pile-raft composite foundation in Jinan West Railway Station of Beijing-Shanghail High-speed Railway,grey system theory is used to analyze the settlement process of the pile-raft composite foundation so as to find a suitable analysis method for the pile-raft composite foundation settlement under the condition of large-area load and provide scientific basis for the subgrade construction of the high-speed railway station and yard.