Deep soft soil of the Yangtze River floodplain in Nanjing has a special interlayer structure, which provides favorable conditions for the application of vacuum tube-well dewatering technology. This paper focuses on the design, construction and treatment effect of vacuum tube-well dewatering technology. The hydrological parameters and the hydraulic connections between the various layers of the site have been ascertained through two simple single-well multi-holes pumping tests. Moreover, the layout of vacuum tube wells and depressurization wells in a test site with 84 m length and 84 m width was designed based on the above parameters. Field tests of vacuum tube-well dewatering technology were conducted on the test site. And the changes in groundwater level, ground settlement and pore water pressure during the test was monitored. The CPTU test technology was used to quickly evaluate the engineering properties of the site before and after treatment. Finally, combined with the settlement monitoring data, the hyperbolic method was used to predict the final settlement. The results indicated that the consolidation efficiency of vacuum tube-well dewatering technology has obvious advantages. Implications of this study can provide a reference for the construction design of the site's ground improvement consolidation and other similar projects.

南京长江漫滩深层软土具有特殊的层间结构，为真空管井脱水技术的应用提供了有利条件。本文重点介绍真空管井脱水技术的设计、施工及处理效果。通过两次简单的单井多孔抽水试验，确定了场地各层之间的水文参数和水力联系。并根据上述参数设计了长84m、宽84m的试验场真空管井和减压井的布置。在试验现场进行了真空管井脱水技术的现场试验。并监测试验过程中地下水位、地面沉降和孔隙水压力的变化。CPTU测试技术用于快速评估处理前后场地的工程性能。最后，结合沉降监测数据，采用双曲线法对最终沉降进行预测。结果表明，真空管井脱水技术固结效率具有明显优势。本研究的意义可为场地地基加固加固等类似工程的施工设计提供参考。