工程地质学报2026，Vol.34Issue(2)：781-794,14.DOI:10.13544/j.cnki.jeg.2025-0043
饱和砂土层注浆-冻结联合技术冻结特性试验研究
TRIAL STUDY ON FREEZING CHARACTERISTICS OF GROUTING-FREEZING TECHNOLOGY IN SATURATED SAND LAYER
摘要
Abstract
This study addresses the technical challenge of closing the freezing wall in saturated sand layers under strong seepage conditions by proposing a combined grouting and freezing method.A dual-hole grouting-freezing model test was conducted to systematically investigate the effects of seepage velocity and refrigerant temperature on the freezing characteristics of the grout-matrix composite.The test results indicate that:(1)The seepage field significantly delays the development of the freezing temperature field.Increased seepage velocity results in an overall temperature rise of the freezing field,with the temperature near the freezing pipes being dominated by the refrigerant,while the temperature at the distal end is controlled by seepage.(2)Higher seepage velocity reduces the thickness of the freezing wall of the grout-matrix composite upstream and downstream,prolongs the closure time,increases the average temperature of the frozen body,and causes the shape of the freezing wall to shift downstream.(3)Lower refrigerant temperature increases the thickness of the freezing wall,shortens the closure time,reduces the average temperature,and effectively improves the uniformity of the freezing effect.Furthermore,field monitoring results from a Tianjin metro connection tunnel validate the feasibility of this grouting-freezing combined technique under similar geological conditions.This study reveals the coupling mechanism of seepage and freezing and proposes the synergistic optimization of freezing effectiveness through refrigerant temperature regulation and grouting to retard seepage.The findings provide a theoretical basis for the combined grouting and freezing construction method in strata with strong seepage.关键词
饱和砂土层/注浆-冻结/温度场/冻结壁/模型试验Key words
Saturated sand layer/Grouting-freezing/Temperature field/Frozen wall/Model trial分类
建筑与水利引用本文复制引用
李星,袁若琳,张德良,闫玥,马家冲..饱和砂土层注浆-冻结联合技术冻结特性试验研究[J].工程地质学报,2026,34(2):781-794,14.基金项目
企事业委托课题"盐碱地区海相沉积粉质黏土层注浆-冻结联合技术研究及应用"(资助号:TIDT11-05-2023-FW-023).This research is supported by the Enterprise-Commissioned Project:"Research and Application of Grouting-Freezing Combined Technique for Ma-rine-Deposited Silty Clay Layers in Saline-Alkali Areas"(Grant No.TIDT11-05-2023-FW-023). （资助号:TIDT11-05-2023-FW-023）
