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Volume 46 Issue 11
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GE Chunwei, LIU Zhong, LAN Wei, YANG Ningye, WEN Lei, ZHOU Jie. Model tests on performances of DSM and CS-DSM piles[J]. Chinese Journal of Geotechnical Engineering, 2024, 46(11): 2420-2428. DOI: 10.11779/CJGE20230791
Citation: GE Chunwei, LIU Zhong, LAN Wei, YANG Ningye, WEN Lei, ZHOU Jie. Model tests on performances of DSM and CS-DSM piles[J]. Chinese Journal of Geotechnical Engineering, 2024, 46(11): 2420-2428. DOI: 10.11779/CJGE20230791
shu

Model tests on performances of DSM and CS-DSM piles

  • 1.

    ZheJiang Kunde Innovate Geotechnical Engineering Co., Ltd., Ningbo 315100, China

  • 2.

    Kunde Research Institute of Intelligent Geotechnical Technology, Ningbo 315100, China

  • 3.

    Central Research Institute of Building and Construction, MCC Group, Beijing 100088, China

  • 4.

    Department of Geotechnical Engineering, College of Civil Engineering, Tongji University, Shanghai 200092, China

  • 5.

    Key Laboratory of Geotechnical and Underground Engineering (Tongji University), Ministry of Education, Shanghai 200092, China

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  • Received Date: August 15, 2023
  • Available Online: March 24, 2024
    Graphical Abstract
    • Abstract
  • Using the small-scale model rig, a comparative experimental study is conducted to investigate the process control and quality control in the deep soil mixing (DSM) method and contra-rotational shear deep soil mixing (CS-DSM) method. The research emphasis is placed on the effects of cement content, blade rotation number T on the uniformity and unconfined compression strength (UCS) of mixing piles. A notably improved uniformity and continuity of the CS-DSM piles over the DSM piles is confirmed by the test results. The strength ratio Rs ranges from 1.41 to 6.4, and it shows an exponential decrease with the increasing T. Furthermore, the results from 24 model piles provide insights into the fundamental relationship and distinctions between UCS and T. On this basis, the construction parameters can be optimized to ensure the target design strength for both types of piles. The model test results clearly demonstrate the differences in the construction quality between the DSM method and the CS-DSM method. The technical basis established in this study serves as a cornerstone for the process control and quality assurance in installing high-quality CS-DSM piles.
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    • References (26)
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