Secondly, with the help of the fluid-mechanical coupling function in 3-dimentional finite difference program FLAC3D, the 3-dimentional coupling analysis on deep foundation excavation and dewatering is carried out to analyze settlement of surrounding buildings considering different working conditions and some settlement regularity is obtained.

By using principles of gray prediction,this paper made a prediction of subsidence of buildings on earth′s surface under the influence of shaking caused by mining.

Taking the commonality as aim,and based on the method for building settlement observation,and through making the dimensional extension of disturbance quantity and deformation quantity,this paper sets up a building s four-dimensional deforming-data detecting model frame.

The fluid-mechanical coupling function in the finite difference program FLAC3D and 3-dimentional numerical method are used to analyze different factors that affect the surrounding ground and building settlements induced by dewatering during excavation of deep foundation pit.

This paper analyses the data from the observation of some building settlement cases by means of curve fitting, exponential smoothing,and GM(1,1) models.

Combining with project example of settlement observation at the Minsheng Square in Nanning city,this paper applies regression analysis and gray prediction to deformation data analysis and prediction of buildings settlement,the prediction result shows the feasibility and reliability of the technique.

This paper analyses the data form some buildings settlement observation by means of curve fitting, indicator easement, and GM(1,1) models.

Research on forecasting building displacement with GM(1,1) weighted model;

The building displacement measuring system based on single chip microcomputer, including the electric circuits of signal transformation, adjustment, collection, handling, saving, showing, ports, etc.