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Three-dimensional numerical analysis of deep excavations with cross walls

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Abstract

Previous plane strain analysis of a case history has shown that cross walls in an excavation can effectively reduce movements induced by deep excavation. This study performed three-dimensional numerical analyses for 4 deep excavation cases with different installations of cross walls, including different excavation depths, cross wall intervals and cross wall depths. Both the observed and computed wall deflections for the 4 cases were compared with those of the same excavations that were assumed with no cross walls installed to demonstrate the effectiveness of cross walls in reducing lateral wall deflections. The results show that the cross wall also had a corner effect similar to that of the diaphragm wall. The deflection of the diaphragm wall was smallest at the location of the cross wall installed and then increased with the increasing distance from the cross wall, up to the midpoint between two cross walls. Many factors such as in situ soil properties, diaphragm wall properties, construction procedure, cross wall depth and so on may affect the amount of reduction in lateral wall deflections due to the installation of cross walls. Under the same condition, the amount of reduction was highly dependent on the depth of cross walls, distance to the cross walls and the cross wall interval.

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Authors and Affiliations

  1. Department of Assets and Property Management, Hwa Hsia Institute of Technology, 111, Gong Jhuan Rd., Chung Ho, New Taipei City, 23568, Taiwan

    Pio-Go Hsieh

  2. Department of Construction Engineering, National Taiwan University of Science and Technology, 43, Sec. 4, Keelung Rd, Taipei, 10672, Taiwan

    Chang-Yu Ou

  3. Hung Tung Construction Co., Ltd. Shin Long Group, 6th FL., 92, Sec. 2, Dunhua South Rd., Taipei, 10668, Taiwan

    Yi-Lang Lin

Authors
  1. Pio-Go Hsieh
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  2. Chang-Yu Ou
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  3. Yi-Lang Lin
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Correspondence to Chang-Yu Ou.

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Hsieh, PG., Ou, CY. & Lin, YL. Three-dimensional numerical analysis of deep excavations with cross walls. Acta Geotech. 8, 33–48 (2013). https://doi.org/10.1007/s11440-012-0181-8

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  • DOI: https://doi.org/10.1007/s11440-012-0181-8

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