卸荷作用下淤泥变形规律的试验研究

随着我国基础设施建设步伐的加快，在越来越多的工程中要涉及到对回弹变形的分析。通过大量试验，研究了淤泥在卸荷作用下的变形特性。淤泥的回弹变形存在临界卸荷比，当淤泥卸荷比小于临界卸荷比时，淤泥不发生回弹变形；当卸荷比大于临界卸荷比时，淤泥发生回弹变形，回弹变形可以分为主回弹变形、次回弹变形、附加次固结变形三部分，附加次固结变形的实质仍然是土骨架的蠕变。

Test research on deformation properties of ooze under unloading

There are many settlement deformation analyses about soft soil ground in the past engineering practice. With the rapid development of infrastructure construction, the rebound deformation analyses are needed in many engineerings. Deformation properties under unloading have been studied through large numbers of tests. For the ooze’s rebound defamation, a critical unload ratio is existed. When ooze’s unload ratio is lower than critical unload ratio, rebound deformation doesn’t happen; when ooze’s unload ratio is higher than critical unload ratio, rebound deformation will happen. The ooze’s deformation after unloading is divided into primary rebound; secondary rebound and appending secondary consolidation deformation. The essential of appending secondary consolidation deformation is creeping of soil framework.