| Citation: |
LAN Mingqing, QIU Min. Application Research of Precipitation Dynamic Compaction Technology in the Treatment of Silty Clay Sites: A Case Study of Yangluo Tieshui[J]. Hydrogeology & Engineering Geology, 2025, 52(0): 1-10. DOI: 10.16030/j.cnki.issn.1000-3665.202403046
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This study addresses the ineffective application of traditional soft foundation treatment methods in muck clay soil foundations. Using the Yangluoxiang project as an example, the study explores the reinforcement mechanism and construction process parameters of a new type of dewatering-intensive tamping technique in soft soil foundation treatment. The study innovatively combines the tamping technique with the well-point dewatering method, fully utilizing the characteristics of well-points to reduce excess pore water pressure generated by the tamping technique and to discharge the pore water. In the Yangluoxiang project, the groundwater level was lowered to 3 meters below the ground surface in about 2 days before the first round of tamping, to 5 meters below the ground surface in about 3 days before the second round of tamping, and to 5 meters below the ground surface in about 6 days before the tamping, with the entire dewatering cycle taking about 11 days. After the first round of tamping, the excess pore water pressure dissipated by 70% in about 7 days. The test results show that the dewatering-intensive tamping method can significantly improve the consolidation of soft clay in a short time, reduce the occurrence of the "rubber soil" phenomenon, effectively treat the soil to a depth of 6.0 meters, and significantly improve the bearing capacity of the soft soil foundation (>150 kPa). This study provides a theoretical basis and construction process parameters for soft soil foundation treatment projects that are widely distributed in the coastal regions of China.
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