首页期刊在线 2023年（第26卷）第3期

人工冻土冻胀引发地面变形规律及影响范围探究

王磊

Law of Ground Deformation Caused by Artificial Frozen Soil Frost Heave and the InfluenceRange

WANG Lei

作者信息:

1.1. 煤炭科学研究总院， 100013，北京；
2.2. 北京中煤矿山工程有限公司， 100013，北京；
3.3. 中国铁路工程集团有限公司， 100055，北京
Affiliation:

China Coal Research Institute, 100013, Beijing, China
关键词:

人工冻结法;软土地层;冻胀;地面变形;冻胀影响范围
Key words:

artificial ground freezing method;soft soil stratum;ground deformation;influence range of frost heave
DOI:

10.16037/j.1007-869x.2023.03.017
中图分类号/CLCN:

TU472.9
栏目/Col:

研究报告

摘要:

采用随机介质理论和模型试验方法，基于现场测试数据和文献发表数据，分析了人工冻土冻胀引发地面变形规律和冻胀影响范围。结果表明：① 随机介质理论计算结果表明人工冻土冻胀引发地面变形曲线是一条高斯型二重积分曲线；② 物理模型试验得出地面抬升曲线规律与高斯分布拟合度较高，试验地面抬升曲线的高斯分布拟合系数为0977 47，工程实测数据的高斯分布拟合系数为0949 32~0995 53，对文献数据拟合得出拟合系数位于0954 41~0983 44；③ 冻结引发地面变形范围为8~10倍冻胀丘宽度。冻结壁为对称结构或拟对称结构时，冻胀引发地面变形曲线可以采用高斯分布进行拟合。该结论可以为人工冻土冻胀引发上部地面变形量计算及影响范围提供设计参考。

Abstracts:

By adoping the random medium theory and model test method, and based on measured data and literature published data, the law of ground deformation caused by frost heave and the influence range are analyzed. The results show that: (1) The curve of ground deformation caused by artificial frozen soil frost heave is a Gaussian double integral curve according to the calculation of the stochastic medium theory. (2) The physics model test shows that the law of ground heave curve has a high fitting degree with Gaussian distribution, and the experimental fitting coefficient of the ground heave curve and the Gaussian distribution is 0-977 47. The Gaussian distribution fitting coefficient of the engineering measured data is in 0-949 32－0-995 53, and the fitting coefficient from literature data is in 0-954 41－0-983 44; (3) The range of ground deformation caused by freezing is 8－10 times the width of the frost heave mound. The ground deformation curve caused by frost heave can be fitted and calculated by using Gaussian distribution when the frozen wall presents a symmetric or quasi-symmetric structure. The results can provide design reference for the calculation and influence range of the ground deformation caused by artificial frozen soil frost heave.