地下综合管廊软土地基沉降曲线机理及预测

Settlement Curve Mechanism and Prediction of Soft Soil Foundation in Utility Culvert

摘要: 针对软弱土地区管廊地基沉降预测问题，为了更加有效可靠地预测软土地基沉降，本文基于沉降量与沉降速率间的微分动力学关系，构建出沉降曲线动力学预测模型。并将该模型与实测数据以及数值结果进行对比，以验证该理论模型的有效性。针对某地区软土地区综合管廊地基沉降，选用两种典型的沉降改变速率，求解得到了指数曲线模型以及双曲线模型。构建观测数据偏差的平方和达到最小且最大优度的优化模型，将上述两种模型与实测数据进行对比。结果表明：指数曲线模型更适合应用于该地区地基沉降全过程的沉降预测。

Abstract: For the problem of predicting the settlement of utility culvert foundations in soft soil areas, in order to predict the settlement of soft soil foundations more effectively and reliably, this paper constructs a settlement curve dynamics prediction model based on the differential dynamics relationship between the settlement amount and the settlement rate. The model is also compared with the measured data and numerical results to verify the validity of the theoretical model. The exponential curve model and the hyperbolic model were obtained by solving two typical settlement change rates for the settlement of utility culvert foundations in soft soil areas. The optimization model is constructed to minimize the sum of squares of deviations from the observed data and to maximize the goodness, and the two models are compared with the measured data. The results show that the exponential curve model is more suitable for the settlement prediction of the whole process of foundation settlement in this area.