Paper Title:
The Model Test Study on Frost Heaving and Melting Sedimentation of Subway Tunnel Construction with Manual Level Freezing Method
  Abstract

With the aim of solving technical problems existing in the rehabilitation construction of butt-joint sect works with manual level freezing undermining method, under Huangpu River of Shanghai Underground Subway 4# between Nanpu Bridge station and Pudong South Road Station, Group of large-scaled physical model tests had been performed adopting the Manual Level Freezing Undermining Method (MLFM in brief) in constructing double track tunnel. Firstly, the model design and test system integration were made; afterward, through model tests, the paper systematically studied the laws of stratum frost heaving, melting sedimentation rule and stratum displacement variations etc, during the undermining construction of tunnel being frozen. The results indicate: the Maximum displacement of frost heaving measured at the top of freezing wall during up line freezing process was 1.36mm, which is equivalent to actual work quantity of 29.92mm; the strata melting sedimentation displacement during forceful thawing is 54% less than what was during natural thawing, which illuminates that adopting forcing thawing can reduce melting sedimentation of soil blocks.

  Info
Periodical
Advanced Materials Research (Volumes 243-249)
Edited by
Chaohe Chen, Yong Huang and Guangfan Li
Pages
3476-3483
DOI
10.4028/www.scientific.net/AMR.243-249.3476
Citation
Z. S. Yao, H. B. Cai, H. Cheng, "The Model Test Study on Frost Heaving and Melting Sedimentation of Subway Tunnel Construction with Manual Level Freezing Method", Advanced Materials Research, Vols. 243-249, pp. 3476-3483, 2011
Online since
May 2011
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Price
$32.00
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Authors: Jing Li, Zhi Nan Jiang, Jun Wei Li
Chapter 2: Geotechnical Engineering and Geological Engineering
Abstract:The experiments were carried out on the remolded soil to study the change law of the soil properties with the numbers of freezing and thawing...
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