Temperature Field Numerical Analysis of Different Freeze Pipe Spacing of Vertical Frozen Soil Wall Reinforcement at Shield Shaft

Jun Hu; Bao Shi Jiang; Hui Zeng; Ya Nan Chen; Yun Yun Zhu

doi:10.4028/www.scientific.net/AMM.580-583.738

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 580-583Temperature Field Numerical Analysis of Different...

Temperature Field Numerical Analysis of Different Freeze Pipe Spacing of Vertical Frozen Soil Wall Reinforcement at Shield Shaft

Abstract:

Determining the freezing pipe spacing, the freezing reinforcement required range and method, acquiring the development and distribution patterns of frozen soil wall temperature field are the key issues needed to be addressed when using vertical freezing method for the soil reinforcement at shield shaft. Based on the shield launching project of the cross-river shield tunnel of Nanjing subway line 10 and the finite element numerical analysis software, the development and distribution patterns of different distance between freezing pipes of the vertical frozen wall are studied. The numerical simulation shows that, it is feasible to use the numerical model to simulate the temperature field of vertical frozen wall. Decreasing the distance between freezing pipes causes a greater impact on the temperature field. When freezing pipe spacing increases to 0.1m, frozen wall cross-lap time increases of about 1 day. With the freezing pipe spacing increasing, the cross-lap time increases linearly. The temperature of frozen wall decreases with the distance between freezing pipes decreasing, and the strength of frozen wall is more uniform. Results and conclusions form this research may play a useful role to aid designs of similar projects in future.

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Periodical:

Applied Mechanics and Materials (Volumes 580-583)

Pages:

738-741

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.580-583.738

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Online since:

July 2014

Authors:

Jun Hu*, Bao Shi Jiang, Hui Zeng, Ya Nan Chen, Yun Yun Zhu

Keywords:

Freeze Pipe Spacing, Shield Launching, Temperature Field, Vertical Frozen Soil Wall

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* - Corresponding Author

References

[1] Hu Jun, Zeng Hui, Wang Xiaobin. Numerical Analysis of Temperature Field of Cup-shaped Frozen Soil Wall Reinforcement at Shield Shaft[J]. Applied Mechanics and Materials, 2013, 341-342(5): 1467-1471.

DOI: 10.4028/www.scientific.net/amm.341-342.1467

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[2] Hu Jun, Zeng Hui, Wang Xiaobin. Experimental Research on the Physi-mechanical Performances of Geosynthetics[J]. Applied Mechanics and Materials, 2013, 341-342(5): 33-37.

DOI: 10.4028/www.scientific.net/amm.341-342.33

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