Calculating Methods For The Foundation Settlement Of Considering Lateral Deformation And Settlement Prediction

The calculation of the foundation settlement is always a difficult problem that puzzles researchers of geotechnical engineering. The precision of its calculating results has an direct effect on the design,construction and safe usage.In the typical calculation of the settlement of foundation, additional stress incurring by loading is calculated according to elastic theory which has the same characteristics in semi-indefinated space, the condesion of soil is decided by the condesion experiment of one-demension and the settlement is calculated by adding results of respective layer. Obviousely, it has difference between theory and realastic in stress and deformation to some extent. In order to overcome the disadvantages of the traditional calculating method,many researchers of geotechnical engineering like to use other calculating methods and analyze the oringinal settlement data to predict the settlement. Compared with the traditional calculating method, this method has the advantages of accuracy and convenience.There are two parts in this paper. In the first part, the deformaion behavior of soil loaded is analyzed. Then we construct the equation that considers the lateral deformaion of the settlement of foundation which is loaded by rectangle vertical equal loading through recongnizing the characteristics of deformation. In order to check the this method ,we apply it to the engineering example. Then we will find that the calculating result has more referring merits than method of the Code. The calculating result is not only same as the result of the model-predicting which is the best model we testmonied but also it is more safe than the method of the Code because it is larger.The second part studies the methods of settlement prediction. Because there are many factors that affect the settlement of soil.Furthermore, the relationship between timeand settlement is very complicated. In this paper we adopt the method that called the prediction method of multi-mthod and compile a program by C++ calculated for predicting. At the same timejt is proposed that the mean error ,maximum error and minimum error of the last 8 numbers between the measured results and predicting results are used as criteria in order that we can select the optimum model judge the accuracy and dispersion of measured results. Finally,by comparing with the predicting results of 3 engingeering examples,the prediction results of GM(1,1) model are proved to be better and more stability than other predicting models, the prediction method of multi- model and judging result are feasible.