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Ground behavior during the consolidation by vacuum preloading of soft clay layer

机译：真空预加载软黏土层固结过程中的地面行为

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This paper describes ground behaviors during the consolidation by vacuum preloading of soft clay layer with vertical drains beforehand installed. Based on four practical cases carried out in the last two years, it was confirmed that the reduction in pore pressure within the ground caused by vacuum pressure occurs down to the bottom of the vertical drains, and that the influenced area of ground surface deformation is limited only to a distance nearly equal to the drain length from the edge of improvement area. Settlement measurements at the center of the preloading areas showed a fact that the traditional one-dimensional prediction method far overestiamtes final settlement, and it was suggested that the traditional prediction method should be revised from the viewpoint of isotropic consolidation characteirstic in the case of consolidation by vacuumed water pressure.
机译：本文描述了在固结过程中通过预先安装垂直排水管对软黏土层进行真空预加载而产生的地基行为。根据最近两年进行的四个实际案例，可以确认由真空压力引起的地下孔隙压力的降​​低一直发生到垂直排水管的底部，并且限制了地表变形的影响范围距改善区域边缘的排水长度几乎等于排水长度。在预压区中心的沉降测量结果表明，传统的一维预测方法远远高估了最终沉降，建议从各向同性固结特性的角度对传统预测方法进行修正，以进行固结。真空水压。

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