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Volume 36 Issue zk1
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Zhang yu-cheng, YANG Guang-hua, HU Hai-ying, CHEN Fu-qiang, HUANG Zhi-xing, CHEN Wei-chao. Some problems about retaining structures for shallow pits in deep and soft soil areas of Pearl River Delta[J]. Chinese Journal of Geotechnical Engineering, 2014, 36(zk1): 1-11. DOI: 10.11779/CJGE2014S1001
Citation: Zhang yu-cheng, YANG Guang-hua, HU Hai-ying, CHEN Fu-qiang, HUANG Zhi-xing, CHEN Wei-chao. Some problems about retaining structures for shallow pits in deep and soft soil areas of Pearl River Delta[J]. Chinese Journal of Geotechnical Engineering, 2014, 36(zk1): 1-11. DOI: 10.11779/CJGE2014S1001
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Some problems about retaining structures for shallow pits in deep and soft soil areas of Pearl River Delta

  • 1. Guangdong Research Institute of Water Resources and Hydropower, Guangzhou 510610, China;
    2. The Geotechnical Engineering Technology Center of Guangdong Province, Guangzhou 510610, China;
    3. The Emergency Technology Research Center of Guangdong Province for Public Events, Guangzhou 510610, China;
    4. College of Water Conservancy and Civil Engineering, South China Agricultural University, Guangzhou 510642, China;
    5. School of Civil Engineering and Transportation, South China University of Technology, Guangzhou 510641, China;
    6. Guangdong Qiyuan Architecture Engineering Design Co., Ltd., Guangzhou 510628, China

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  • Received Date: July 27, 2014
  • Published Date: July 27, 2014
    Graphical Abstract
    • Abstract
  • The soft soil of Pearl River Delta is the softest in China, which is characterized by high water content, high compressibility and low bearing capacity. In addition, it is of deep soil layer, low permeability, strong structure, rheology and preconsolidation. Those are likely to make the design and construction more difficulty, the project price higher and project accidents of foundation pits occur more frequently in this area. Especially when the excavation is 3~6 m (basement), some instability and local slip accidents are always induced because of the design, construction and management institutions' little attention. Aiming at the particularity of shallow pits in deep and soft soil areas and the problems found in engineering practices, some problems about retaining structures for the shallow pits in deep and soft soil areas are discussed: (1) common types and reasonable schemes; (2) modes of instability failures; (3) reasons of instability failures; (4) effects of passive zone improvement; (5) some project accidents about instability failures. This work may provide technical support for the design at shallow pits, and the relevant achievements may provide useful reference for optimizing the design and construction. It can be a good reference for similar projects.
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    • References (12)
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