Understanding the deformation behavior of the frozen curtain during excavation is crucial when employing artificial freezing methods in construction. This study uses indoor frozen soil experiments and numerical simulations to determine the compressive and flexural strengths of the frozen curtain, along with its displacement and stress variation patterns. Results show that lower freezing temperatures continuously increase uniaxial compressive strength, flexural strength, and elastic modulus of frozen soil, while Poisson's ratio decreases. Among the two soil types studied, silty interlayered with sand demonstrates greater compressive strength, flexural strength, and elastic modulus. Numerical simulation analysis indicates that the top of the frozen curtain experiences settlement during cross passage excavation, while the bottom exhibits uplift. The safety factors of the frozen curtain were validated and confirmed to be within safe limits. This study integrates frozen soil experiments and numerical simulations to offer guidance for future cross passage excavations and related engineering designs.

中文翻译：

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地铁交叉通道开挖过程中冻幕位移及应力变化研究


在建筑中采用人工冻结方法时，了解冰幕在挖掘过程中的变形行为至关重要。本研究使用室内冻土实验和数值模拟来确定冻土的抗压强度和抗弯强度，以及其位移和应力变化模式。结果表明，较低的冻结温度不断提高冻土的单轴抗压强度、弯曲强度和弹性模量，而泊松比减小。在研究的两种土壤类型中，淤泥与沙子夹层表现出更大的抗压强度、弯曲强度和弹性模量。数值模拟分析表明，在交叉通道开挖过程中，冻帷幕顶部出现沉降，而底部出现隆起。对冻结帘子的安全系数进行了验证，确认在安全范围内。本研究整合了冻土实验和数值模拟，为未来的交叉通道开挖和相关工程设计提供指导。