On June 5, 2025, the technical team of Hubei Junhui Geotechnical Engineering Co., Ltd. visited China Railway Siyuan Survey and Design Group Co., Ltd. (hereinafter referred to as "SY Group") to conduct a special technical seminar on cutting-edge technologies and engineering applications of soft soil foundation treatment. Relevant technical leaders and key personnel from both parties attended the meeting.

  SY Group is a backbone enterprise in the fields of domestic rail transit, railway, and comprehensive transportation survey and design, with profound technical accumulation and rich engineering practice in foundation treatment of railways, stations, and supporting projects in soft soil areas along rivers and coasts. This seminar aimed to strengthen technical alignment between the design and construction ends and promote the engineering application of new soft foundation treatment processes in the transportation infrastructure sector.

  At the meeting, our technical team systematically introduced two core patented construction methods independently developed by the company. The first is the deep rapid dewatering dynamic consolidation method (rapid consolidation method), which was iteratively upgraded from the traditional high-vacuum dynamic compaction method. Through the coordinated operation of deep well-type dewatering pipes, water-ring vacuum pump sets, water-gas separation tanks, and crawler-type dynamic compaction machines, it achieves deep rapid dewatering and multi-pass dynamic consolidation, featuring deep dewatering, fast consolidation, short construction period, and low cost. Excess pore water pressure can dissipate by more than 80% within 30 to 36 hours, and the construction period can be shortened by about two-thirds compared with conventional dewatering and dynamic compaction processes. The second is the rapid consolidation sand-free direct-drainage vacuum preloading technology, which adopts anti-clogging drainage boards, deep well-type dewatering pipes, seamless connections, and water-gas separation technology, eliminating the traditional medium-coarse sand cushion layer. The vacuum transmission path is shorter and the vacuum distribution is more uniform, effectively solving problems such as easy clogging of drainage boards and long vacuum pumping cycles in conventional vacuum preloading.

  Focusing on the applicable conditions and key design points of the above construction methods, both parties conducted in-depth discussions. Based on completed and ongoing engineering cases such as the Yangluo International Port Rail-Water Intermodal Yard, Nantong Weihua Port Equipment Base, and Yangtze River Delta Automobile Science and Technology Innovation Base, our company focused on explaining the permeability coefficient adaptation range, key design parameter values, dynamic monitoring during construction, and quality acceptance control standards of the construction methods in complex strata such as hydraulic fill, mucky soil, and fine silty sand, and presented data-based demonstrations of the achieved effective reinforcement depth, foundation bearing capacity, and compression modulus indicators. Experts from SY Group, considering the strict post-construction settlement control requirements of railway stations, logistics yards, and other projects, provided professional opinions on deep reinforcement of soft soil, uneven settlement control, design parameter selection, and testing and evaluation. Both parties fully exchanged views on conducting technical cooperation and process applicability research in relevant projects in the future.

  This technical seminar enhanced SY Group's understanding of the technical characteristics and engineering effectiveness of our patented construction methods and laid a good foundation for design-construction collaboration between both parties in the field of soft soil foundation treatment. In the next step, Hubei Junhui Geotechnical will continue to deepen the research and application of dewatering dynamic compaction and sand-free direct-drainage vacuum preloading technologies, strengthen technical linkage with survey and design units, and provide professional foundation treatment solutions for infrastructure construction in transportation, port, logistics, and other fields with reliable processes, controllable quality, and quantifiable data.