摘要
为了提高施工质量、效益和安全性,对地铁车站基坑施工引起的地表沉降进行预测具有重要的现实意义。通过对合肥膨胀土地区地铁车站地表沉降实测数据的分析,其地表总沉降量与时间之间具有发生、发展、成熟最后达到极限值的变化关系,这一规律与饱和曲线及Usher曲线相似。文章基于组合预测的思想,建立饱和曲线-Usher曲线组合预测模型。统计学结果显示,组合预测模型相对于单一模型的准确度至少提升了98%。工程应用实例显示,组合预测模型具有良好的适应性和准确性,能够较为精准的预测膨胀土地区地铁车站地表沉降的变化趋势,研究结果对于实际工程有较好的参考价值。
In order to improve the construction quality,benefit and safety,it is of great practical significance to predict the ground settlement caused by subway station foundation pit construction.By analysizing of the measured data of the ground settlement of the metro station in the expansive soil area of Hefei,we find that the relationship between the total settlement of the ground surface and the time is from occurrence,development,maturity and fi⁃nally reach the limit value.This law is similar with saturation curve and Usher curve.Based on the idea of combined forecasting,this paper establishes the combination forecasting model of saturation curve and Usher curve.The sta⁃tistical results show that the accuracy of the combined model is improved by at least 98%compared with that of a single model.The example of engineering application shows that the model has good adaptability and accuracy,and can accurately predict the change trend of ground settlement of subway station in expansive soil area.This study has a good reference value for practical engineering.
作者
周煜程
ZHOU Yu-cheng(Zhejiang Suzhi Jiaotong Academy Science and Technology Co.,Ltd.,Hangzhou 310000,China)
出处
《浙江交通职业技术学院学报》
CAS
2023年第4期13-18,共6页
Journal of Zhejiang Institute of Communications
