ISSN 1004-4140
CN 11-3017/P
吴传洋. 填方土体压实效果多道瞬态瑞雷波快速检测方法[J]. CT理论与应用研究, 2023, 32(6): 703-712. DOI: 10.15953/j.ctta.2022.243.
引用本文: 吴传洋. 填方土体压实效果多道瞬态瑞雷波快速检测方法[J]. CT理论与应用研究, 2023, 32(6): 703-712. DOI: 10.15953/j.ctta.2022.243.
WU C Y. Rapid and Continuous Detection Method for Soil-compaction Degrees of Fill Foundation Based on Multichannel Transient Rayleigh Wave Detecting[J]. CT Theory and Applications, 2023, 32(6): 703-712. DOI: 10.15953/j.ctta.2022.243. (in Chinese).
Citation: WU C Y. Rapid and Continuous Detection Method for Soil-compaction Degrees of Fill Foundation Based on Multichannel Transient Rayleigh Wave Detecting[J]. CT Theory and Applications, 2023, 32(6): 703-712. DOI: 10.15953/j.ctta.2022.243. (in Chinese).

填方土体压实效果多道瞬态瑞雷波快速检测方法

Rapid and Continuous Detection Method for Soil-compaction Degrees of Fill Foundation Based on Multichannel Transient Rayleigh Wave Detecting

  • 摘要: 大型工程场地挖填方地基处理面积大、工期紧,需要及时、快速掌握地基加固处理的质量情况,以确保工程质量和进度;同时为确保工程的安全稳定,大型工程对地基土体加固效果的均匀性往往有较高要求。地基土体压实效果常规检测方法主要有原位载荷试验、原位灌砂和土样测试等方法,这些方法要么设备笨重、耗时,要么会造成已加固的地基土体的破坏,从而无法对地基土体展开快速、连续检测。为克服上述问题,本文采用考虑道间时差相位的多道瞬态瑞雷波探测方法,辅以抽样点的取土试验测试,对某大型工程填方地基土体压实加固效果展开快速、连续检测,获得地基土体弹性波速的三维连续图像,进而生成附加应力影响深度范围内地基土体的瑞雷波相速度成像水平切片和地基土体深度平均压实系数水平分布成像。这些地基土体成像结果可以较好地反映出地基土体压实加固效果,从而为地基土体加固质量评价提供重要参考。

     

    Abstract: To address the large treatment area and tight construction period of large-scale engineering site filling foundations and to ensure the quality and progress of the project, understanding the foundation-reinforcement treatment quickly and accurately is essential. Additionally, to ensure the safety and stability of projects, large-scale projects often have higher requirements for the uniformity of the foundation-soil reinforcement effect. The quality-evaluation indices of foundation-soil compaction and reinforcement mainly include the foundation-bearing capacity, foundation-soil deformation modulus, and compaction coefficient. Conventional testing methods primarily include in-situ loading tests, in-situ sand filling, and soil-sample testing. These methods are either labor-intensive and time-consuming or harmful to the reinforced foundation-soil mass, preventing rapid and continuous detection of the foundation-soil mass. To perform rapid and continuous detection of the compaction and reinforcement effects of foundation-soil mass, the multichannel transient Rayleigh wave-detection method, considering the time difference phase between channels, was used in this study. Additionally, the method was supplemented by the sampling tests of soil mass at selected points in this study. Consequently, continuous three-dimensional imaging of the elastic wave velocity of the foundation-soil mass was obtained, along with the horizontal slice of the Rayleigh wave phase velocity imaging and the horizontal-distribution imaging of the depth-average compaction coefficient of the foundation-soil mass. The results reveal that the foundation-soil mass imaging can accurately reflect the compaction and reinforcement effects of the foundation-soil mass, thereby providing a reliable basis for evaluating the quality of foundation-soil mass reinforcement.

     

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