TPGM(1,1)预测模型在基坑变形中的应用研究

Application of TPGM (1,1) Prediction Model in Foundation Pit Deformation

依据深基坑周边地表沉降监测信息,运用灰色理论的方法,对基坑周边地表沉降发展变化规律进行合理的预测可以有效的确保基坑施工期间变形安全和正常使用要求。针对传统的GM(1,1)和DGM(1,1)模型本身数学结构的不足,提出采用TPGM(1,1)预测模型对基坑周边地表沉降进行预测。结合工程实例计算表明,在TPGM(1,1)模型中,利用已知监测数据预测未来一段时间内的基坑周边地表沉降能获得更加精确的预测结果。该研究成果能为动态信息化施工以及施工阶段的基坑灾害评估、预警提供有力指导。

Based on the monitoring information of the ground settlement around the deep foundation pit, reasonable prediction of the law of the ground settlement development and change around the foundation pit using the grey theory method can effectively ensure the deformation safety and normal operation requirements during the foundation pit construction. In view of the deficiency of the traditional GM (1,1) and DGM (1,1) models themselves, this paper proposes to use the TPGM (1,1) prediction model to predict the ground settlement around the foundation pit. Combined with engineering example calculation, it is shown that in TPGM (1,1) model, more accurate prediction results can be obtained by using the known monitoring data to predict the ground settlement around the foundation pit in a period of time in the future. The research results can provide strong guidance for dynamic information construction and foundation pit disaster assessment and early warning during construction.