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Experimental Study on Frost-Heave Behavior of Cement-modified Clayey Silt under Different Construction Procedures
(1. China Coal Tianjin Design & Engineering Co.Ltd., Tianjin 300120; 2. Stante Key Laboratory of Intelligent Construction and Healthy Operation and Maintenance of Deep Underground Engineering, China University of Mining and Technology, Xuzhou 221116)
Abstract Cement-stabilization technology has been widely applied in ground-freezing construction for municipal geotechnical engineering due to its effectiveness in mitigating frost heave. However, existing studies have primarily been conducted under standard laboratory conditions, and the influence of construction procedures remains insufficiently understood. In this study, clayey silt from Tianjin was adopted as the research object, and three sample preparation procedures simulating different construction processes (DSC, SC, and SCP) were designed. Frost-heave tests were systematically conducted under varying cement contents and curing ages. The results indicate that cemented soil prepared using the DSC procedure exhibits a “frost-shrinkage-frost-heave-stabilization” evolution pattern, while SC specimens show only slight frost shrinkage at high cement contents, and SCP specimens yield the highest frost-heave ratios overall. Frost heave is negatively correlated with both cement content and curing age, with the former having a more significant impact. The sensitivity of frost heave to cement content follows: SCP > SC > DSC, whereas the sensitivity to curing age follows: SC > DSC > SCP.
Abstract：
Cement-stabilization technology has been widely applied in ground-freezing construction for municipal geotechnical engineering due to its effectiveness in mitigating frost heave. However, existing studies have primarily been conducted under standard laboratory conditions, and the influence of construction procedures remains insufficiently understood. In this study, clayey silt from Tianjin was adopted as the research object, and three sample preparation procedures simulating different construction processes (DSC, SC, and SCP) were designed. Frost-heave tests were systematically conducted under varying cement contents and curing ages. The results indicate that cemented soil prepared using the DSC procedure exhibits a “frost-shrinkage-frost-heave-stabilization” evolution pattern, while SC specimens show only slight frost shrinkage at high cement contents, and SCP specimens yield the highest frost-heave ratios overall. Frost heave is negatively correlated with both cement content and curing age, with the former having a more significant impact. The sensitivity of frost heave to cement content follows: SCP > SC > DSC, whereas the sensitivity to curing age follows: SC > DSC > SCP.
GUO Zhijie1 CAO Yi2 REN Meng1 HOU Yingxia1 WANG Yansen2 LIANG Hongzhen1 LI Wei1 ZHANG Ling1
.Experimental Study on Frost-Heave Behavior of Cement-modified Clayey Silt under Different Construction Procedures[J] MODERN TUNNELLING TECHNOLOGY, 2025,V62(5): 269-
2025, Vol. 62 