基坑冻结围护的研究现状与发展展望  

State of the Art Review of Freezing in Support of Excavation Engineering

作　　者：毕书琦 甘彬霖 BI Shuqi;GAN Binlin(Research Institute of Mine Construction,China Coal Research Institute,Beijing 100013;Beijing China Coal Mine Engineering Co.Ltd.,Beijing 100013;National Engineering Laboratory for Deep Shaft Construction Technology in Coal Mine,Beijing 100013)

机构地区：[1]煤炭科学研究总院建井研究分院,北京100013 [2]北京中煤矿山工程有限公司,北京100013 [3]煤矿深井建设技术国家工程实验室,北京100013

出　　处：《土工基础》2021年第3期365-370,共6页Soil Engineering and Foundation

基　　金：天地科技股份有限公司科技创新创业资金专项重点基金项目(2018—TD—ZD004)。

摘　　要：随着地下空间的不断开发和重大工程建设的需要,基坑工程朝着大深度、大面积、复杂地质条件的方向发展。冻结法具有临时支护、止水截水、适用范围广、污染小等特点,在基坑工程中具有良好的发展前景。对基坑冻结的冻结参数、温度场、冻胀力、变形特性的研究现状进行综述,分析了基坑冻结应用中存在的问题,认为计算理论与模型的局限性、基坑热交换剧烈、界面作用机理与影响范围的模糊性以及相关规范标准不完善是阻碍冻结法在基坑工程中应用的主要原因。提出设计理论体系的深入研究、规范标准体系的建立以及全过程施工的信息化管理的发展展望,为基坑冻结的深入研究和应用提供指导。The recent deep excavation projects present the characteristics of deeper depth,larger area and more complicated geological conditions with an increasing utilization of underground space and the construction of major projects.Owing to the characteristics of temporary support,groundwater stops and groundwater cut-off,wide application range and minimal pollution,the artificial freezing method has received an increasing in the excavation supporting projects.The application status of the artificial freezing method in foundation pit engineering were summarized in this paper,and the research of freezing parameters,temperature field,frost heaving force and deformation characteristics were also discussed comprehensively in this paper.Problems existed in the application of artificial freezing method in deep excavation projects were investigated.It is concluded that the limitations of the analytical theory and model,the intense heat exchange in the excavated area,the ambiguity of interface mechanism and influence range,and the imperfection of relevant standards are the main reasons that might impede the application of the artificial freezing method in excavation supporting projects.This paper presents that the future development trends are the in-depth study of the design theories,the establishment of the standard system and the information management during the entire construction process.

关 键 词：冻结法 基坑 冻土帷幕 冻胀力 变形 展望 

分 类 号：TU473[建筑科学—结构工程]