考虑实测数据新旧程度的工后沉降单项模型预测方法

A prediction method for post-construction settlement of a single model with the consideration of the new or old degree of the measured data

工后沉降预测是建筑物地基或路基安全性与加固维护方案决策的重要依据。因此,为了获得更加合理而简单实用的单项模型工后沉降预测方法,本文针对实测沉降数据新旧程度对地基沉降预测效果的影响,引入新鲜度函数,对单项预测模型沉降计算值与实测值之间的误差描述方法进行改进,从而建立出单项预测模型拟合分析的新型目标误差函数,并在此基础上,提出了基于实测沉降曲线的拟合分析确定地基单项沉降预测模型参数的新方法,进而提出了反映实测沉降数据新旧程度影响的单项模型工后地基沉降预测新方法。它既不失传统单项模型沉降预测方法简单实用的特点,还能明显改善地基沉降预测的效果。

The post-construction settlement prediction of building foundation or roadbed is an important basis for its safety assessment and the project decision of repairing and strengthening. Therefore,aiming at the effect of the new or old degree of the measured data to the foundation settlement prediction,a new objective function of the single model-fitting analysis is established by introducing a fresh degree function,which is used to improve the description method of the error between the calculated values and the measured values,in order to obtain a more simple,reasonable and practical method for post-construction settlement of the single model.The new method to determine the parameter based on the fitting analysis of a measured curve is developed.Thus the new method for post-construction settlement of the single model can reflect the effect of the new or old degree of the measured settlement data on prediction. It contains the simple and practical characteristics of traditional method,and can obviously improve the effect of foundation settlement prediction.