摘要
盾构推力是盾构正常掘进的关键控制参数之一,但受地质条件、掘进深度和盾构机参数等因素的影响,往往难以准确计算。为提高盾构掘进过程中的刀盘推力计算的准确性,结合南京某地铁工程提出了一种基于量纲理论和施工现场掘进参数相结合的力学数学建模方法。首先针对影响盾构掘进推力的主要因素及其受力特点,建立基于量纲理论的多参数盾构推力模型;随后基于施工现场掘进参数对模型系数进行回归分析,得到反演识别模型;最后将计算模型预测值和实测值曲线进行对比。结果表明数据曲线基本一致,能够很好的反映推力与各主要掘进参数的关系,由误差统计频率图可知,计算模型的误差总体控制在15%以下,进一步显示了模型的合理性和可靠性。
Shield thrust is one of the key control parameters for normal shield tunneling,but it is often difficult to accurately calculate due to geological conditions,tunneling depth,shield machine parameters and other factors.In order to improve the accuracy of cutterhead thrust calculation in the process of shield tunneling,a mechanical mathematical modeling method based on the combination of dimensional theory and construction site tunneling parameters is proposed for a subway project in Nanjing.Firstly,according to the main factors affecting the thrust of shield tunneling and their stress characteristics,a multi parameter model of thrust of shield tunneling based on dimensional theory is established.Then,the model coefficients are regressed based on the tunneling parameters of construction site,and the inverse identification model is obtained.The results show that the data curves are basically consistent,which can well reflect the relationship between thrust and main driving parameters.According to the error statistical frequency chart,the overall error of the model is controlled below 15%,which further shows the rationality and reliability of the model.
作者
李雪
吴九七
郭庆飞
向乔
耿凤娟
Li Xue;Wu Jiuqi;Guo Qingfei;Xiang Qiao;Geng Fengjuan(School of Geoscience and Technology,Southwest Petroleum University,Chengdu 610500,P.R.China;China Railway Construction Bridge Engineering Bureau Group 2nd Engineering Co.,Ltd,Shenzhen,Guangzhou 518000,P.R.China)
出处
《地下空间与工程学报》
CSCD
北大核心
2022年第S02期573-577,共5页
Chinese Journal of Underground Space and Engineering
基金
国家自然科学基金(51808469)
四川省自然科学基金(2022NSFSC0442)
关键词
盾构机
推力
掘进参数
量纲理论
shield machine
thrust
tunneling parameters
dimension theory
