Heavy vibratory plate compaction is an efficient technique for improvement of granular soils. However, its practical application is limited by insufficient knowledge about the compaction process and the optimum procedure of execution. In this study, compaction tests were conducted in the field with a 40.5-ton heavy vibratory plate compactor. The site consisted of partially saturated, overconsolidated medium-dense silty sand and sandy silt. Such conditions can generally be characterized as difficult for vibratory compaction. The objective of the tests was to study the compaction depth and the influence of treatment layout, duration of compaction, and vibration frequency. In-situ measurements conducted before, during and after treatment included static cone penetration tests, flat dilatometer, and heavy dynamic probing. The in-situ tests showed a statistically significant compaction after treatment. The main conclusions highlight the importance of a sufficient centrifugal force of the vibratory hammer to cause disconnection between the plate and the soil. Other important parameters are the vibration frequency and the duration of treatment, which can be optimized by field monitoring. Full coverage of the ground surface is required for compaction of the entire soil volume. It was also found that the compaction depth corresponds to the side length of the plate, in line with previous studies.

重型振动板压实是改良粒状土的有效技术。然而，由于对压缩过程和最佳执行过程的了解不足，其实际应用受到限制。在本研究中，使用 40.5 吨重型振动板式压实机在现场进行了压实试验。该场地由部分饱和、超固结的中致密粉砂和砂质粉砂组成。这样的条件通常可以表征为难以振动压实。测试的目的是研究压实深度和处理布局、压实持续时间和振动频率的影响。在处理之前、期间和之后进行的原位测量包括静态锥形穿透测试、平面膨胀仪和重动态探测。现场测试显示处理后的压实具有统计学意义。主要结论强调了振动锤足够的离心力导致板和土壤之间断开的重要性。其他重要参数是振动频率和治疗持续时间，可以通过现场监测进行优化。为了压实整个土壤体积，需要完全覆盖地表。还发现压实深度对应于板的边长，与先前的研究一致。其他重要参数是振动频率和治疗持续时间，可以通过现场监测进行优化。为了压实整个土壤体积，需要完全覆盖地表。还发现压实深度对应于板的边长，与先前的研究一致。其他重要参数是振动频率和治疗持续时间，可以通过现场监测进行优化。为了压实整个土壤体积，需要完全覆盖地表。还发现压实深度对应于板的边长，与先前的研究一致。