Study On The Deformation Behavior And Settlement Prediction Method Of Using Prefabricated Plastic Drain Preloading Improving The Soft Clay Foundation

The distribution of soft soil is very extensive in China,the characteristics of it are:high natural moisture content ratio,high natural void level and high compression ratio.The unfavorable characters of soft soil foundation are:the low carrying capacity,high settlement and long consolidation time.The soft soil consolidation problem of the buildings are set up on it which construct on the soft soil is a technical tickler.So it is very important to theory and actuality by probing the regularity of soft soil,forecast the final consolidation by the forecast model and methodology from the actual settlement data.A study is carried out to the application scope of stak preloading and dynamic compaction in soft foundation treatment of Nanitang in Yantan port of west port area of Shenzhen,the design of construction parameter,local observation.The examination and analysis are made on the reinforcement effect of this method.The result shows that the analyzer fulfills all design requirements,expounds the principle and implementation procedure of ANN.Two different modeling methods of neural network are used in the paper for different conditions and requirements in practical engineering.One is BP using implicit formula to express the connection between factors and settlement.The current settlement can be concluded by known factors when predicting.The other is Elman not considering the factors of settlement,but establishing the neural network model for the connection between current settlement and the past.Then the late settlement can be predicted by highly nonlinear curvefitting.Verify and contrast to the traditional layerwise summation method,some methods of curve fitting method such as hyperbolic method,exponential method,poission curve method and Asaoka method,and the sample training, the check are used to discuss the results of fitting and prediction so that all these methods can be evaluated by using an unified standard. It is shown that BP and the hyperbolic method are considered as the most effective ones among methods on settlement prediction in soft foundation treatment of Nanitang in Yantan port of west port area of Shenzhen.Because scarcity of the test final settlements date, The prediction effection of Asaoka method should be further validated in more projects in this area.