凍結(jié)法施工中圍巖的凍脹應力、凍脹應變和凍脹潛勢

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中圖分類號：TU94；TU445 文獻標識碼：A DOI：10.7525/j.issn.1006-8023.2025.03.019

Abstract：To predict and control the frost heave behavior of surounding rock in frezing construction，basedon the theoryof accumulated deformation energy in elastoplastic materials with expansion tendencies，this study analyzed that frozen soil with expansion tendencies under constraints possessed such deformation energy，which manifested as frost heave stress andfrost heave strain when the constraints were insuffcient orreleased.Therefore，this paper proposed the conceptand expressionoffrostheave potential onthe basisof the theoryof elasticdeformation energy.Thisconcept， with frost heave stress and frost heave strain functions as parameters，represented the deformation energy accumulated in the soil duetofreezingofthesurroundingrock．Basedonthis，aseriesoffrostheave tests wereconductedonsiltyclay along asubway line.Calculations yielded frost heave stress and frost heave strain at diferent temperatures.When the freezing temperature was ，the frost heave stress，frost heave strain，and frost heave rate were O.338 MPa， 0 . 4 4 6 % ，and 3. 13 % ，respectively. The calculated results were in good agreement with the actual engineering requirements.Frost heave potentialcanbeused to describe the overallfost heavebehaviorof rock and soil massesand provides a new perspective and approach for enriching and developing frozen soil theory and freezing method technology.

Keywords：Freezing method construction；frostheave stress；frost heave strain;frost heave potential； frost heave rate

0 引言

人工凍結(jié)法施工是巖土體加固的一種有效方式，多用于隧道聯(lián)絡(luò)通道施工、軟弱土層開挖和高含水率地下土層滲透等工程中[1-4]。（剩余10344字）