【摘要】 在不同振动条件下,软土的流动特性是不同的。本文通过一系列的拖球试验,研究了在整体振动和局部振动条件下,振动频率、含水率和围压对软土流动特性的影响,并总结了在不同影响因素下,整体振动和局部振动对软土流动特性的影响规律。试验结果表明:在局部振动条件下,振动频率、软土含水率和围压对软土流动特性的影响规律与整体振动基本一致。但是,由于振动条件的不同,两种效果之间存在着显著差异。与传统的整体振动相比,局部振动条件下,以上三种因素对软土的流动特性影响更大。在振动频率较低及土的含水率较低的情况下,局部振动对软土流动性能的影响效果和整体振动存在较大差距;随着振动频率及土含水率的增高,两种不同振动方式的影响效果的差距趋于减小。另一方面,围压的增加对局部振动和整体振动的软土流动特性影响差距很小。更多还原

【Abstract】 The flow characteristics of soft soil under different vibration conditions are different. In order to investigate the effects of vibration frequency,water content and confining pressure on the flow characteristics of soft soil,a series of pulling sphere experiments were conducted under whole and localized vibration conditions. The influences of whole vibration and localized vibration on the flow characteristics of soft soil under different influencing factors were summarized. Laboratory testing results indicate that under the condition of localized vibration,the influence rule of vibration frequency,water content of soft soil and confining pressure on the flow characteristics of soft soil is basically consistent with the whole vibration. However,there is a significant difference between the two effects due to the different vibration conditions. Compared with the conventional whole vibration,three factors above have more significant influence on the flow characteristics of soft soil under localized vibration.Under the low vibration frequency and the low soil water content,the effect of whole vibration and localized vibration on the flow characteristics of soft soil varies greatly. With the increase of vibration frequency and soil water content,the difference between the two vibration conditions tends to decrease. Besides,the increase of confining pressure has no significant influences on the flow characteristics of soft soil under localized vibration and whole vibration.更多还原