盾构隧道接收端冻结温度场的演化规律
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U231

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国家自然科学基金(51974014, U2034206)


Evolution Rule of Freezing Temperature Field at the Receiving End of Shield Tunnel
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The National Natural Science Foundation of China (51974014, U2034206)

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    摘要:

    为了研究哈尔滨地铁大有坊街站~太平桥站区间左线盾构接收端水平冻结温度场的演化规律,本文通过开展接收端土层热物理试验,建立ABAQUS三维数值模型,研究了杯型冻结壁有效厚度、平均温度及温度场发展与分布规律,并结合现场监测验证了接收端冻结工程方案的可靠性。结果表明:冻结过程中,杯型冻结壁的外圈管、内圈管和中圈管依次完成交圈;积极冻结25 d,杯型冻结壁有效厚度和平均温度均已满足方案要求,继续积极冻结至30 d,杯底厚度发展至3.74 m,平均温度可达–18.99 ℃;杯身厚度发展至1.81 m,平均温度可达–14.12 ℃。可见,该加固方案安全可行,研究结果可为相同地层环境下盾构接收端冻结工程提供参考。

    Abstract:

    In order to study the horizontal freezing temperature field evolution law at the shield receiving end on the left line between Dayoufang Street Station and Taipingqiao Street Station of Harbin Metro, the ABAQUS three-dimensional numerical model was established by carrying out thermophysical tests on soil layer at the receiving end. The development and distribution of effective thickness, average temperature and temperature field of cup-shaped freezing wall were studied. Meanwhile, the reliability of the freezing engineering scheme at the receiving end was verified combined with the field monitoring. The results show that the closed loops of outer freezing pipes, inner freezing pipes and middle freezing pipes in cup-shaped freezing wall are completed in turn. When actively frozen for 25 days, the effective thickness and average temperature of cup-shaped freezing wall have met the scheme requirements. When it continues to freeze actively for 30 days, the thickness of cup bottom has developed to 3.74 m and the average temperature has reached –18.99 ℃. The thickness of cup body has developed to 1.81 m and the average temperature has reached –14.12 ℃. Hence, the reinforcement scheme is safe and feasible. The research can provide reference for the shield receiving end freezing project in the same stratum environment.

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引用本文

孙佳琪,苗胜军,隋智力. 盾构隧道接收端冻结温度场的演化规律[J]. 科学技术与工程, 2022, 22(8): 3300-3308.
Sun Jiaqi, Miao Shengjun, Sui Zhili. Evolution Rule of Freezing Temperature Field at the Receiving End of Shield Tunnel[J]. Science Technology and Engineering,2022,22(8):3300-3308.

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历史
  • 收稿日期:2021-05-30
  • 最后修改日期:2021-12-07
  • 录用日期:2021-11-12
  • 在线发布日期: 2022-03-21
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