Application of BP Neural Network to Forecast the Expansive Force of the Expansive Soil

At present it is troublesome to forecast the expansive force of the expansive soil because the method is complex and sometimes the test is quite difficult and the different initial conditions come to different results.Therefore this article introduces the BP network to carry on the forecast of the expansive force with effective results,which may be applied to forecast the expansive force of the same type of expansive soil.So it is of significance to use this method in civil engineering.