本文介绍了真空预压在单块面积为4000m~2的海淤土上进行加固的实验研究。加固中,膜下真空度达到87kPa,地基上的承载力由30kPa提高到78kPa,消除沉降70cm,平均团结度达到70％。认为是一种行之有效的加固方案。同时还测得砂井与淤泥中的真空度和不同深度土层中扎隙水压力的变化,为指导大面积的地基加固及今后的实验研究提供了有益的资料。 This paper introduces the experimental study of vacuum preloading on the sea silt soil with a single block area of ​​4000m~2. During the consolidation, the vacuum degree under the membrane reached 87 kPa, the bearing capacity on the foundation increased from 30 kPa to 78 kPa, the settlement was eliminated by 70 cm, and the average degree of unity reached 70%. Think of it as an effective reinforcement solution. At the same time, the vacuum degree in sand wells and silt and the change of the water pressure in the gaps in different depths were also measured, which provided useful information for guiding large-scale ground reinforcement and future experimental research.