Experimental Research On Deformation Of Alluvial Flat Soft Ground Along Yiluo River

Considering the actual conditions of highway embankment constructed on the alluvial flat soft clay ground along Yi Luo River in the area of Yellow River, an insitu experimental scheme was designed to observe the deformation of soft clay ground. A continuous deformation observation of the soft clay ground beneath the highway embankment was made within more than two years, by the use of inclinometer tubes, settlements plats and border piles. And a large amount of data was drawn. On the basis of data analysis, the basic deformation principles of alluvial flat soft clay ground were summarized, and some important conclusions that can be referred in the design and construction of projects were put forward as follow: 1. When applied loads continuously and evenly, sedimentation of alluvial flat soft clay ground is basically proportional to the load. 2. Construction control should focus on horizontal displacement rather than on vertical sedimentation. 3. Incrustations of alluvial flat soft clay ground have obvious effects in reducing foundation deformation and in enhancing bearing capacity of subsoil. Accordingly, the treatment measures to the soft clay ground can be saved when the embankment is not high enough. 4. A method of construction control to the weakest layer is brought forward by the data analysis and conclusion about basic deformation principles. The weakest layer which causes horizontal movement distress can be the soft clay layer beneath incrustation or some deeper layer under alluvial flat soft clay ground. 5. Within the precompression period, sedimentation of soft clay ground has a clear hyperbola relationship to time history. Hence, hyperbola can be employed to deduce the eventual or residual sedimentation at any time.