The pnnciple and the main step of trcatmcnt of soft soil in intertidal zone of Lianyungang with cacuum preloadmg are introduced in detatled through a case and the date of in situ monitoring is analysed deeply. The vacuum pressure of 80kpa is applied for about 100 days to consolidate the soft clay layer with thickness of 10m. The settlement is about 1m. The average degree of consolidation estimated according to the observation data is over 80％. The undrained shear strength of the soil is elevated remarkably after vacuum preloading. The bearing capacity of the foundation basically reaches the requirement of construction.which show that the vacuum preloading technology is suitable for consolidation of soft soil in intertidal zone of Lianyungang.%以实际工程为例.论述了真空预压排水固结法加固连云港沿海地区潮间带软土地基的原理和施工要点,对工程实际的观测结果进行了深入分析.实践证明,使用真空预压法,对地基施加相当于80 kPa荷载的真空压力,100 d后地基的总沉降量可达到1 m,地基土的平均固结度超过80%,经过加固的地基土抗剪强度明显增加,地基承载力基本满足后续施工要求.表明真空预压法适用连云港沿海潮问带软基加固,效果明显.
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