Abstract：
A new long term prediction model is established based on Grey Theory and polynomial.The new model and the original index model are applied to the prediction of deep foundation pit of metro station in Urumqi region-specific geological conditions pebble,and the prediction results of the two models are compared,the prediction results show that the prediction accuracy of the new model is better than the index model,and the new model fit better in changes of the settlement curve .The new model can provide reference for the settlement prediction of similar foundation pit in Urumqi area,and have a certain significance about guiding the construction of follow-up projects to reduce the waste of resources.
